Calculate forex trade P&L with entry/exit prices, lot size, swap rates, and commission across multiple currency pairs.
A favorable price move does not translate into a fixed cash gain across every forex trade. This calculator combines the currency pair, buy or sell direction, entry price, exit price, and lot size, then accounts for swap and commission to estimate gross and net P&L. It treats rising prices as favorable for buys and falling prices as favorable for sells. A common mistake is entering a one-way commission as the complete round-trip charge, or using a swap rate that does not match the position direction and holding period.
A concrete input and expected output from the current implementation.
Input
Pair: EUR/USD; direction: Buy; entry: 1.1000; exit: 1.1010; lot size: 1.00 standard lot (100,000 EUR); swap: 0 USD; commission: 0 USD
Expected output
Gross P&L: +100.00 USD; Swap: 0.00 USD; Commission: 0.00 USD; Net P&L: +100.00 USD
The price increased by 0.0010 USD per EUR. Multiplying 0.0010 by 100,000 EUR gives a 100.00 USD gross profit, and zero costs leave the net result unchanged.
In EUR/USD, EUR is the base currency and USD is the quote currency. For a buy, gross P&L is the exit price minus the entry price, multiplied by the base-currency position size. For a sell, the price subtraction is reversed. One standard lot represents 100,000 base-currency units, so even a small price change can produce a material result.
The price result is adjusted for financing and transaction charges. Swap can increase or reduce P&L depending on the pair, trade direction, entered rate, position size, and holding period. Commission reduces the result. Net P&L should reconcile as gross P&L plus the applicable signed swap amount minus commission. With both costs set to zero, gross and net P&L are equal.
Yes. A buy that closes above its entry, or a sell that closes below its entry, has a favorable gross price result. Net P&L can nevertheless be negative when commission and adverse swap exceed that gross gain. Review the gross result and each cost separately before interpreting the final figure.
Not necessarily. A close match requires the same executed prices, position size, commission scope, swap amount, and currency conversion used by the broker. Differences can also arise from rounding or from substituting quoted prices for actual fills. The calculator is suitable for reconciliation only when its inputs reflect the broker's recorded transaction values.
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