Productivity & Time

Time Card Calculator Exact hours across midnight and clock changes. World Building Bible and Consistency Checker Your world, your calendar, no contradictions. Light Year Distance Calculator Exact definitions, every digit shown. City Distance Calculator As the crow flies, measured on the ellipsoid. Satellite Pass Predictor Real orbit math from current elements. Cross Stitch Pattern Maker Every square a stitch, every symbol a color. CM Checklist Maker Create customizable checklists with groups, due dates, and priorities for any project. DP Daily Planner Creator Design a printable daily planner with time blocks, goals, and priority sections. TS Typing Speed Test Measure your typing speed in WPM and accuracy with real-time feedback and stats. FT Focus Timer with Ambient Sounds Pomodoro timer with built-in ambient noise (rain, cafe, forest) generated via Web Audio API oscillators. PT Pomodoro Timer Stay focused with a customizable Pomodoro timer featuring work and break intervals. ST Stopwatch A precise stopwatch with lap tracking, split times, and exportable results. CT Countdown Timer Set a countdown timer for events, deadlines, or presentations with audio alerts. WC World Clock & Timezone Converter View current times across multiple timezones and convert between them instantly. MC Meeting Cost Calculator Calculate the real cost of meetings based on attendee count, salaries, and duration. HT Habit Tracker Track daily habits with streaks, completion rates, and visual progress charts. RD Random Decision Maker / Wheel Spinner Spin a customizable wheel or flip a coin to make random decisions quickly. TZ Time Zone Meeting Planner Select participants' timezones and find overlapping business hours. Interactive visual timeline for scheduling. SR Screen Ruler On-screen pixel ruler to measure anything on the page. Horizontal and vertical guides with draggable positioning. IG Image Gallery Layout Planner Plan responsive image gallery layouts with grid, masonry, and carousel previews. CH Clipboard History Manager Track clipboard copies during your session. Search, re-copy, and organize snippets using the Clipboard API. PG Printable Grid Paper Generator Generate and print custom grid paper (square, isometric, dot grid, hex grid) with configurable spacing. GP Graph Paper Maker Create printable graph paper with customizable grid size, line weight, margins, and color options. LP Lined Paper Generator Generate printable lined paper with adjustable line spacing, margins, and ruled/college/wide options. DP Digital Protractor & Ruler On-screen protractor for measuring angles and ruler for measuring distances in images or on screen. PS Presentation Slide Maker Create simple presentation slides with title, content, image layouts, and slide transitions for export. BC Burndown Chart Generator Create sprint burndown and burnup charts from story point data with ideal trend lines. PC Printable Calendar Designer Design custom printable calendars with monthly/weekly/yearly views, events, and color themes. ST Schedule Template Maker Create printable weekly and monthly schedule templates with customizable time slots and categories. RC Resume / CV Builder Build professional resumes with multiple layout templates, sections, and print-ready formatting. WN White Noise Generator Generate white, pink, and brown noise for focus, sleep, and sound masking. SR Screen Recorder Record screen, window, or tab with audio using browser MediaRecorder API. WR Webcam Recorder Record video from webcam with optional microphone audio and mirror preview. CG Certificate Generator Create customizable certificates and awards with templates, text, and borders. SC Soundboard Creator Create custom soundboards with uploaded audio clips and hotkey triggers. OA Online Alarm Clock Set multiple alarms with custom labels, repeat options, and notification sounds using Web Audio API. BR Break Reminder Timer Configurable break reminder that notifies you to stand, stretch, or rest your eyes at set intervals. FM Focus Mode / Site Blocker Block distracting websites during focus sessions with a configurable blocklist and session timer. AS Ambient Sound Mixer Mix and layer ambient sounds like rain, thunder, wind, birds, and cafe chatter with individual volume sliders. OM Online Metronome Precise metronome with adjustable BPM, time signatures, accent patterns, and tap-tempo using Web Audio API. TI Tabata / Interval Timer Customizable interval timer for Tabata, HIIT, and circuit training with audio cues and round tracking. GT Goal Tracker Set and track personal and professional goals with milestones, progress bars, and deadline countdowns. DL To-Do List App Simple to-do list with priorities, due dates, categories, and drag-and-drop reordering saved locally. WP Weekly Planner Plan your week with a 7-day grid view, time blocks, and recurring event support with local persistence. WH Work Hours Calculator Calculate total work hours from clock-in and clock-out times with break deductions and overtime tracking. CV Calendar View / Event Planner Interactive monthly and weekly calendar with event creation, color-coded categories, and local storage. DC Date Countdown / Event Countdown Count down to any future date with days, hours, minutes, and seconds display and shareable countdown links. DC Day Counter / Days Since Track how many days have passed since a specific date, useful for streaks, milestones, and anniversaries. TT Time Tracker / Task Timer Track time spent on tasks with start/stop controls, project categories, and exportable time logs. RT Reading Time Calculator Paste text or set word count to estimate reading and speaking time at adjustable speeds. PT Presentation Timer Full-screen countdown timer for presentations with color-coded warnings and customizable time segments. CC Chess Clock / Game Timer Two-player chess clock with multiple time control modes including Fischer, Bronstein, and simple delay. SC Sleep Calculator Calculate optimal sleep and wake times based on 90-minute sleep cycles for better rest quality. ST Screen Time Tracker Track how long the current browser tab has been active with daily totals and session history. DJ Daily Journal Write daily journal entries with timestamps, mood tracking, and searchable history stored locally. GJ Gratitude Journal Log daily gratitudes with date stamps, review streaks, and browse past entries from local storage. SC Screenshot Capture Tool Capture screenshots of visible tab content or selected areas with annotation tools and instant download. MN Meeting Notes Template Structured meeting notes with attendees, agenda items, action items, and decisions fields with auto-timestamps. EC Event Countdown Widget Create beautiful countdown widgets for events with customizable styles, backgrounds, and embeddable code. WI Water Intake Tracker Track daily water consumption with glass-filling animation, reminders, and streak tracking. WM Weekly Meal Planner Plan meals for the week with breakfast, lunch, dinner, and snack slots with grocery list generation. PS Pomodoro Statistics Dashboard Track Pomodoro sessions over days and weeks with productivity charts, focus scores, and streak counters. RL Reading List / Bookshelf Tracker Track books you want to read, are reading, and have finished with ratings and notes stored locally. BR Birthday Reminder List Store birthdays with names and dates, sorted by upcoming, with age calculation and countdown display. PL Packing List Maker Create travel packing lists with categories, checkboxes, weather suggestions, and reusable templates. PC Pros and Cons List Create weighted pros and cons lists with importance scores and a visual balance comparison chart. FM Focus Music Player Looping ambient music player with lo-fi, classical, and nature categories synced to focus timer sessions. HS Habit Streak Calendar Visual calendar showing daily habit completion with GitHub-style contribution heatmap and streak counters. MT Meditation Timer Customizable meditation timer with interval bells, ambient background sounds, and session history logging. BE Breathing Exercise Timer Guided breathing exercises (4-7-8, box breathing, Wim Hof) with animated visual guide and cycle counting. 22 20-20-20 Eye Break Timer Reminds you every 20 minutes to look at something 20 feet away for 20 seconds to reduce eye strain. DS Desk Stretch Break Timer Periodic reminders with illustrated desk stretches and exercises to prevent repetitive strain injuries. WC World Clock Dashboard Display analog and digital clocks for multiple cities simultaneously with daylight/nighttime indicators. GP Gratitude Prompt Generator Get daily gratitude prompts with categories for relationships, achievements, experiences, and growth. 3D 30-Day Challenge Tracker Track 30-day challenge progress with daily checkboxes, streak counter, and completion certificate. MR Morning Routine Builder Build a timed morning routine with sequential tasks, duration allocation, and daily completion tracking. BU Bulk URL Opener Open multiple URLs at once in new browser tabs from a list for batch website checking and review. DJ Daily Journal App Write daily journal entries with mood tracking, tags, and search. All entries stored locally in your browser. VL Volume & Liquid Converter Convert between liters, gallons, cups, milliliters, fluid ounces, tablespoons, and more. PU Pressure Unit Converter Convert between PSI, bar, atm, Pascal, mmHg, and other pressure units instantly. EU Energy Unit Converter Convert joules, calories, BTU, kilowatt-hours, electron volts, and foot-pounds. PC Power Converter Convert between watts, horsepower, BTU/hr, kilowatts, and foot-pounds per second. TC Torque Converter Convert newton-meters, foot-pounds, inch-pounds, kilogram-force meters, and dyne-cm. FE Fuel Economy MPG Converter Convert MPG, L/100km, km/L, and miles per imperial gallon for any vehicle. KM Kitchen Measurement Converter Convert cups, tablespoons, teaspoons, milliliters, ounces, and grams for recipes. FY Fabric Yardage Converter Convert between fabric widths (45", 54", 60") and calculate yardage for different bolt sizes. PS Paper Size Converter Compare and convert A-series, B-series, US Letter, Legal, Tabloid, and custom paper sizes. FC Frequency Converter Convert hertz, kilohertz, megahertz, gigahertz, RPM, and radians per second. AR Angle & Radian Converter Convert degrees, radians, gradians, arc minutes, arc seconds, and turns. DC Density Converter Convert kg/m³, g/cm³, lb/ft³, lb/gal, and other density units for materials. FR Flow Rate Converter Convert gallons per minute, liters per second, cubic feet per hour, and other flow rates. IC Illuminance Converter Convert lux, foot-candles, phot, and nox for lighting design and photography. FC Force Converter Convert newtons, pounds-force, dynes, kilogram-force, and kips with precision. TD Time Duration Unit Converter Convert milliseconds, seconds, minutes, hours, days, weeks, months, and years precisely. VC Viscosity Converter Convert centipoise, pascal-second, stokes, and SAE grades for fluids and oils. MF Magnetic Field Converter Convert tesla, gauss, oersted, and ampere per meter for magnetic field calculations. RC Radioactivity Converter Convert becquerel, curie, rutherford, and disintegrations per second for radiation measurements. IS International Shoe Size Converter Convert shoe sizes between US, UK, EU, and centimeter systems for men, women, and kids. OA Online Alarm Clock Set multiple alarms with custom labels, snooze intervals, and alarm sounds in your browser. IT Interval Timer Create custom work/rest intervals for HIIT, Tabata, circuit training, and study sessions. EC Event Countdown Create beautiful countdown timers to holidays, birthdays, launches, and milestones. WN Week Number Calendar View ISO week numbers for any year with holiday highlights and quarter boundaries. TD Time Duration Calculator Add and subtract hours, minutes, and seconds to calculate total durations and elapsed time. WH Work Hours Tracker Log daily clock-in and clock-out times, track overtime, and calculate weekly totals. SS Sunrise & Sunset Calculator Calculate sunrise, sunset, golden hour, and blue hour times for any location and date. YP Year Progress Tracker Visualize how much of the current year, quarter, month, and week has elapsed. SS Shift Schedule Planner Create rotating shift schedules for teams with day, swing, and night shift patterns. WT Weekly Time Card Calculator Calculate weekly pay from daily time entries with overtime rules and break deductions. MS Meeting Scheduler Find overlapping availability across multiple participants and time zones. UT Unix Timestamp Tool Convert Unix timestamps to human-readable dates and back with millisecond precision. MP Moon Phase Calendar View moon phases, full moon dates, new moon dates, and lunar cycles for any month. MT Multi Timer Run multiple named timers simultaneously for cooking, workouts, or project tracking. DC Daily Calorie Calculator Estimate daily caloric needs based on age, weight, height, activity level, and goals. MN Macro Nutrient Calculator Calculate optimal protein, carb, and fat ratios for cutting, bulking, or maintenance. WI Water Intake Tracker Track daily water intake, set hydration goals, and get reminders based on your body weight. SC Sleep Cycle Calculator Calculate optimal bedtimes and wake times based on 90-minute sleep cycles. OR One Rep Max Calculator Estimate your 1RM for any lift using Epley, Brzycki, and Lombardi formulas. RP Running Pace Calculator Calculate pace, speed, finish time, and splits for 5K, 10K, half marathon, and marathon. CB Calorie Burn Calculator Estimate calories burned during 100+ activities based on duration, weight, and intensity. BF Body Fat Percentage Calculator Estimate body fat percentage using Navy, BMI, and skinfold methods with visual guides. PD Pregnancy Due Date Estimator Calculate estimated due date, trimester timeline, and key milestones from LMP or conception. HR Heart Rate Zone Calculator Calculate training heart rate zones using Karvonen method for fat burn, cardio, and peak. WH Waist-to-Hip Ratio Calculator Calculate waist-to-hip ratio and assess health risk categories with visual indicators. BA Blood Alcohol Calculator Estimate blood alcohol content based on drinks, weight, gender, and time elapsed. IW Ideal Weight Calculator Calculate ideal weight range using Devine, Robinson, Miller, and Hamwi formulas. BE Breathing Exercise Timer Guided breathing patterns for box breathing, 4-7-8, and Wim Hof with visual animations. WR Workout Rep Counter Track exercise sets, reps, and rest periods with audio cues and workout logging. SR Stretching Routine Builder Build custom stretching routines with hold timers, body part targeting, and visual guides. LB Lean Body Mass Calculator Calculate lean body mass and fat-free mass using the Boer, James, and Hume formulas. PI Protein Intake Calculator Calculate daily protein needs based on body weight, activity level, and fitness goals. VM VO2 Max Estimator Estimate VO2 max from running times, Cooper test, or resting heart rate methods. SD Steps to Distance Converter Convert daily steps to distance walked in miles or kilometers based on stride length. PC Paint Calculator Calculate how much paint you need based on room dimensions, coats, and door/window cutouts. FC Flooring Calculator Calculate flooring material needed in square feet or meters with waste factor for tile, hardwood, or laminate. WC Wallpaper Calculator Calculate rolls of wallpaper needed for any room with pattern repeat and obstacle adjustments. RA Room Area Calculator Calculate square footage for rectangular, L-shaped, and irregular rooms with visual layout. FL Furniture Layout Planner Drag and drop furniture pieces onto a room grid to plan layouts before moving day. CB Curtain & Blinds Calculator Calculate curtain width, length, and fabric needed based on window measurements and fullness. FM Fence Material Calculator Calculate posts, rails, pickets, and concrete needed for wood, vinyl, or chain-link fencing. DB Deck Board Calculator Calculate decking boards, joists, screws, and concrete footings for your deck project. AE Appliance Electricity Cost Calculator Calculate monthly and yearly electricity costs for appliances based on wattage and usage hours. MB Moving Box Calculator Estimate how many boxes and packing supplies you need based on home size and rooms. CC Concrete Calculator Calculate cubic yards or bags of concrete for slabs, footings, columns, and walls. GM Gravel & Mulch Calculator Calculate tons of gravel or cubic yards of mulch needed for paths, beds, and driveways. LL Lighting Layout Planner Plan recessed light spacing and placement based on room size, ceiling height, and lumen needs. PL Packing List Generator Generate smart packing lists based on destination, trip length, weather, and activities. FT Flight Time Calculator Estimate flight duration between cities accounting for distance, wind, and layover time. JL Jet Lag Calculator Plan light exposure and sleep schedules to minimize jet lag when crossing time zones. TB Travel Budget Planner Plan trip expenses for flights, hotels, food, activities, and transportation with daily breakdowns. LW Luggage Weight Checker Check carry-on and checked baggage weight limits for major airlines and calculate fees. RT Road Trip Fuel Planner Calculate total fuel cost for a road trip based on distance, MPG, and gas prices. TC Travel Checklist Builder Create comprehensive pre-trip checklists for documents, electronics, toiletries, and more. IC International Clothing Size Converter Convert clothing sizes between US, UK, EU, and Asian sizing for shirts, pants, and dresses. VD Vacation Day Calculator Optimize PTO usage by finding the best days to take off around weekends and holidays. WP World Power Plug Guide Find the correct power plug type, voltage, and frequency for any country. TE Tipping Etiquette Guide Look up tipping customs, expected percentages, and etiquette for countries worldwide. TI Travel Itinerary Builder Build a day-by-day travel itinerary with activities, locations, notes, and time slots. DT Driving Time Calculator Estimate driving time between two points with rest stop scheduling and speed adjustments. TZ Time Zone Converter Convert any time between multiple time zones simultaneously with DST awareness. FC Fuel Cost Calculator Calculate gas or diesel costs per trip, week, month, or year based on commute and MPG. CM Car Maintenance Scheduler Track oil changes, tire rotations, brake inspections, and other maintenance by mileage intervals. TS Tire Size Calculator Compare tire sizes, calculate speedometer differences, and find plus-size fitments. EH Engine Horsepower Calculator Estimate engine horsepower from quarter-mile time, dyno data, or displacement formulas. AL Auto Loan Payment Calculator Calculate monthly payments, total interest, and amortization for auto loans. EC EV Charging Calculator Calculate charging time, electricity cost, and range for Level 1, Level 2, and DC fast charging. CD Car Depreciation Calculator Estimate vehicle depreciation over time and calculate future resale value by year. TC Towing Capacity Checker Check if your vehicle can safely tow a trailer based on GVWR, tongue weight, and payload. GV Gas vs Electric Cost Comparison Compare total ownership costs of gas vs electric vehicles including fuel, maintenance, and insurance. RI Recipe Ingredient Scaler Scale recipe ingredients up or down by servings or multiplier with automatic unit conversion. IS Ingredient Substitution Finder Find ingredient substitutions for allergies, dietary needs, or missing pantry items. OT Oven Temperature Converter Convert between Fahrenheit, Celsius, gas mark, and fan-assisted oven temperatures. CT Cooking Timer Set Run multiple labeled kitchen timers simultaneously for different dishes and courses. MC Meat Cooking Temperature Guide Reference internal temperatures for beef, pork, poultry, and seafood by doneness level. BP Baking Pan Size Converter Convert batter volumes between round, square, and rectangular pans of different sizes. YC Yeast Conversion Calculator Convert between active dry yeast, instant yeast, fresh yeast, and sourdough starter amounts. MP Meal Prep Planner Plan weekly meals, generate grocery lists, and schedule prep times for batch cooking. BF Butter & Fat Converter Convert between sticks, cups, tablespoons, grams, and ounces for butter, oil, and fats. ES Egg Size Converter Convert egg quantities between small, medium, large, XL, and jumbo sizes for recipes. FW Flour Weight Converter Convert cups to grams for all-purpose, bread, cake, whole wheat, and gluten-free flours. SC Slow Cooker Time Converter Convert oven recipes to slow cooker times and vice versa with temperature adjustments. CI Caffeine Intake Tracker Track daily caffeine from coffee, tea, soda, and energy drinks with half-life visualization. KG Knitting Gauge Calculator Calculate stitch and row counts from gauge swatches to resize knitting patterns. YY Yarn Yardage Calculator Estimate yarn needed for scarves, blankets, and sweaters based on project dimensions. SA Seam Allowance Calculator Calculate pattern piece sizes with seam allowance adjustments for garments and quilts. BF Board Foot Calculator Calculate board feet of lumber from thickness, width, and length for woodworking projects. QF Quilt Fabric Calculator Calculate fabric yardage for quilt blocks, sashing, borders, and backing by quilt size. CH Crochet Hook & Yarn Guide Match crochet hook sizes (US, metric, UK) to yarn weights with gauge recommendations. WJ Wood Joint Reference Guide Browse wood joint types with strength ratings, difficulty levels, and use case recommendations. BC Bead Count Calculator Calculate the number of beads needed for bracelets, necklaces, and other jewelry projects. MT Metronome with Tap Tempo A precise metronome with adjustable BPM, time signatures, accent patterns, and tap tempo. CG Chromatic Guitar Tuner Tune your guitar using your microphone with visual pitch detection for standard and alternate tunings. GC Guitar Chord Chart Browse and display guitar chord diagrams for major, minor, 7th, and extended chords. MS Music Scale Finder Explore major, minor, pentatonic, blues, and modal scales with note displays and audio playback. BT BPM Tap Counter Tap to the beat to detect the tempo of any song in beats per minute. MI Music Interval Trainer Practice identifying musical intervals by ear with audio playback and scoring. KS Key Signature Reference View sharps, flats, and relative minor/major keys for all 15 key signatures. CF Circle of Fifths Explorer Interactive circle of fifths diagram showing keys, chords, and harmonic relationships. PC Piano Chord Player Play chords and notes on a virtual piano keyboard with sustain and octave selection. SK Song Key Finder Identify the musical key of a song by selecting the chords used in the progression. NF Note Frequency Chart Reference table of musical note frequencies across all octaves in Hz with A4 calibration. RD RPG Dice Roller Roll standard and custom dice (d4, d6, d8, d10, d12, d20, d100) with 3D animation and history. CS Card Shuffler & Dealer Shuffle a standard 52-card deck and deal hands for poker, blackjack, or custom card games. GS Game Score Tracker Track scores for multiple players across rounds with running totals and winner highlights. TB Tournament Bracket Maker Generate single or double elimination brackets for 4 to 64 players or teams. TR Team Randomizer Randomly split a list of players into balanced teams for sports, games, or group work. SW Spin the Wheel Create a custom spinning wheel with labeled wedges for random selection and game shows. BC Bingo Card Generator Generate printable bingo cards with custom words, numbers, or images for game nights. VC Virtual Coin Flipper Flip a virtual coin with animation and track heads/tails statistics over multiple flips. CG Chess Game Clock A two-player chess clock with increment, delay, and multiple time control presets. RN Random Number Picker Pick random numbers within a range with options for no repeats, quantity, and lottery presets. CN Character Name Generator Generate character names by genre, origin, and style for fiction, RPGs, and screenwriting. PI Plot Idea Generator Generate random plot premises with protagonist, conflict, and setting combinations. CO Chapter Outline Planner Plan book chapters with scene breakdowns, POV tracking, and word count targets. DF Dialogue Formatter Format screenplay and novel dialogue with proper punctuation, attribution, and style guides. WS Writing Statistics Dashboard Analyze text for sentence length, paragraph count, reading time, syllable count, and vocabulary level. RF Rhyme Finder Find perfect rhymes, near rhymes, and slant rhymes for songwriting and poetry. WC Word Count Goal Tracker Track daily word counts against a target with progress charts and streak tracking. SF Screenplay Formatter Format text into industry-standard screenplay format with scene headings, action, and dialogue. SS Story Structure Planner Plan stories using three-act, Hero Journey, Save the Cat, or Freytag pyramid structures. PE Photography Exposure Calculator Calculate equivalent exposures with aperture, shutter speed, and ISO adjustments. DF Depth of Field Calculator Calculate depth of field, hyperfocal distance, and near/far focus limits for any lens. GR Golden Ratio Overlay Apply golden ratio, golden spiral, and phi grid overlays to uploaded images for composition. RT Rule of Thirds Grid Overlay a rule-of-thirds grid on uploaded images to analyze and improve composition. PP Photo Print Size Calculator Calculate maximum print size at 300 DPI from image resolution with aspect ratio previews. PA Photo Aspect Ratio Cropper Crop photos to standard aspect ratios (4:3, 16:9, 1:1, 3:2) for print and social media. PE Photo EXIF Shutter Count Extract shutter count and detailed EXIF data from camera photos to check actuations. TL Time Lapse Calculator Calculate interval, frame count, shooting duration, and final video length for time-lapse projects. PS Plant Spacing Calculator Calculate how many plants fit in a garden bed with row, grid, and hexagonal spacing options. SA Soil Amendment Calculator Calculate how much compost, peat moss, or fertilizer to add based on bed size and soil type. UG USDA Growing Zone Finder Find your USDA hardiness zone by ZIP code with frost dates and planting season info. SS Seed Starting Calendar Generate a seed starting schedule based on frost dates and plant-specific timing. RB Raised Bed Soil Calculator Calculate cubic feet of soil mix needed to fill raised garden beds of any shape. WS Watering Schedule Planner Create plant-specific watering schedules adjusted for season, soil type, and climate. GB Garden Bed Layout Planner Design garden bed layouts with companion planting suggestions and crop rotation tracking. CR Compost Ratio Calculator Balance green-to-brown ratios for optimal composting with material weight and volume inputs. LF Lawn Fertilizer Calculator Calculate the right amount of fertilizer for your lawn based on area, grass type, and NPK ratio. GS Garden Sunlight Tracker Log and track sun exposure hours in garden zones to match plants with ideal light conditions. PA Pet Age Calculator Calculate your dog or cat age in human years using breed-specific aging curves. PF Pet Feeding Calculator Calculate daily food portions for dogs and cats based on weight, age, and activity level. PW Pet Weight Tracker Track your pet weight over time with growth charts and ideal weight range indicators. PV Pet Vaccination Scheduler Track and schedule vaccinations, boosters, and vet appointments for dogs and cats. DB Dog Breed Size Guide Browse dog breeds by size category with adult weight ranges and exercise requirements. AV Aquarium Volume Calculator Calculate water volume for rectangular, bowfront, and cylindrical aquariums in gallons and liters. LR LED Resistor Calculator Calculate the correct resistor value for LEDs based on supply voltage, forward voltage, and current. BL Battery Life Calculator Estimate battery runtime from capacity (mAh), load current, and efficiency factor. CC Capacitor Calculator Calculate capacitance in series and parallel, RC time constants, and energy storage. WG Wire Gauge Calculator Find the correct AWG wire gauge for current, distance, and voltage drop requirements. PT PCB Trace Width Calculator Calculate PCB trace width for target current based on copper thickness and temperature rise. VD Voltage Divider Calculator Calculate output voltage and resistor values for voltage divider circuits. IC Inductor Calculator Calculate inductance for series and parallel inductors, RL time constants, and impedance. PS Power Supply Calculator Calculate total wattage needed for PC components or project power supply sizing. PP Planet Position Viewer View current positions of planets in the solar system with orbital paths and distances. TM Telescope Magnification Calculator Calculate magnification, true field of view, and exit pupil for telescope-eyepiece combinations. WC Wind Chill Calculator Calculate wind chill factor from temperature and wind speed with frostbite risk warnings. HI Heat Index Calculator Calculate heat index from temperature and humidity with heat exhaustion risk levels. DP Dew Point Calculator Calculate dew point temperature from air temperature and relative humidity. BP Barometric Pressure Converter Convert between inHg, hPa, mbar, mmHg, and atm with weather condition indicators. SP Swimming Pace Calculator Calculate swim pace per 100m/yd, total time, and split targets for pool and open water. CP Cycling Power Calculator Estimate watts per kilogram, FTP zones, and power-to-weight ratio for cycling performance. NL Noise Level Meter Measure ambient noise levels in decibels using your device microphone with visual gauge. CT Color Temperature Converter Convert between Kelvin color temperature, RGB values, and white balance presets for lighting.