Perform arithmetic operations on hexadecimal numbers with real-time decimal and binary conversion.
Type an arithmetic expression in hexadecimal and the tool evaluates it in base 16, showing the decimal and binary value of every operand and of the result as you type. Because each hex digit stands for exactly four binary bits, the binary column lines up with the hex digits one for one, so a sum like A4 visibly becomes 1010 0100. The thing most users trip on is that hex has no decimal-looking shorthand: a number like 10 in hex means sixteen, so the decimal column, not the hex display, is where you confirm what a result is really worth.
A concrete input and expected output from the current implementation.
Input
7F + 25
Expected output
A4 (decimal 164, binary 1010 0100)
F + 5 is 20 decimal, which is 16 + 4, so the units column writes 4 and carries 1; 7 + 2 + 1 is then 10 decimal, written as the digit A. The result A4 converts to 164 decimal, and each hex digit becomes four bits: A is 1010, 4 is 0100.
Base-16 arithmetic uses the same carry and borrow rules as decimal, except a column carries when its sum reaches 16 instead of 10. Digits run 0 through 9, then A through F for 10 through 15. In 7F + 25, the units column sums F + 5 = 20 decimal, writes 4 and carries 1; the next column sums 7 + 2 + 1 = 10 decimal, written as the digit A.
Each hex digit maps to exactly four binary bits, so the binary column is a per-digit rewrite of the hex value: 7 is 0111, F is 1111, and A4 is 1010 0100. The decimal column instead sums each digit times a power of 16, counting from 16^0 at the rightmost position. Both columns recompute as the expression changes, so a mistyped digit shows up immediately in every view.
It is correct: in hex, 10 is sixteen and 20 is thirty-two, and 16 + 16 is 32. Each digit position in base 16 is worth sixteen times the one to its right, so the display is not a typo. The decimal column confirms it by showing 32, the value the expression actually denotes.
That depends on the implementation, and the site does not document a limit. If you work with values at or above about 4.3 billion, which is 0xFFFFFFFF, watch for a result that looks truncated or wraps around, and confirm large results in the decimal column. When in doubt, split the calculation into smaller pieces.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
Calculate percentages, percentage change, and what percent one number is of another with step-by-step breakdowns.
Calculate tips and split bills between multiple people with customizable tip percentages and rounding options.
Calculate monthly payments, total interest, and generate amortization schedules for loans and mortgages.
Calculate Body Mass Index from height and weight with category classification and healthy range guidance.
Calculate sale prices, savings amounts, and final costs after single or stacked percentage discounts.
Compute mean, median, mode, standard deviation, variance, and other descriptive statistics from a data set.