Trading calculators
Nine calculators for the arithmetic behind a trade and a trading account. Each one runs in your browser, shows its formula and a worked example, and keeps its inputs in the page address so a result can be bookmarked or shared.
Sizing a trade
- Position size calculatorLots, units, shares or contracts that keep the loss at your stop to a set amount. Forex, gold and silver, stocks, futures.
- Pip value calculatorWhat one pip is worth in your account currency for any forex pair, gold or silver, at any lot size.
- Risk reward ratio calculatorThe reward-to-risk ratio from entry, stop and target, and the win rate that ratio needs to break even.
Limits and drawdown
- Prop firm drawdown calculatorRoom left today and overall under daily loss and maximum loss rules, static or trailing, and which rule binds first.
- Drawdown recovery calculatorThe gain needed to return to a previous peak after a drawdown of any size, with a reference table.
Win rate, expectancy and growth
- Break-even win rate calculatorThe win rate at which average wins pay for average losses and trading costs.
- Trading expectancy calculatorThe average amount a set of trades makes or loses per trade, from win rate, average win and average loss.
- Risk of ruin calculatorHow often simulated accounts with your win rate, payoff and risk per trade fall to a set drawdown.
- Compounding calculatorA balance under a fixed percentage return each period, with deposits or withdrawals, charted period by period.
Arithmetic, not advice
Every figure on these pages comes from the numbers you enter and a published formula. Nothing is fetched from the internet: there are no live prices or exchange rates, so any conversion rate is one you type in. Nothing you enter leaves your device.
The calculators do not know your broker's contract specifications, your prop firm's rulebook or the market. Check contract sizes, pip definitions and rule wording against the source before relying on a result.
Stop calculating by hand. Journal it.
Import your trades from MetaTrader, cTrader, NinjaTrader, Tradovate or any CSV and see win rate, expectancy, drawdown and your prop-firm room — computed for you, stored only on your device.