The Trader's Position-Sizing Calculation Companion
Risk-based position sizes, R-multiples, running P/L, and FX or crypto quote conversions: type them the way you would sketch them on a trade sheet and read the answers next to each line.
Built for traders
Risk-Based Position Size
Define `account = 20000 USD`, `risk per trade = 1%`, `entry = 180`, and `stop = 172`, then `position size = account * risk per trade / (entry - stop)`. Change any input and the size updates instantly.
R-Multiples and P/L Percent
Reward-to-risk reads naturally: `r multiple = (target - entry) / (entry - stop)`. Percent moves stack line by line: `entry + 4%` for a target, `entry - 2%` for a hard stop.
FX and Crypto Quote Conversions
Convert between 200+ currencies, plus BTC and ETH, at rates refreshed hourly: type `500 EUR to USD` for a foreign broker balance or `0.25 BTC to USD` for an on-chain position, and read the answer next to the line.
One Tab Per Position
With Lifetime, keep every open trade on its own tab. Rename tabs by ticker or pair so a new setup does not overwrite the size and stop you just sketched for another position.
See It in Action
Position size from risk
account = 20000 USD
risk per trade = 1%
entry = 180
stop = 172
position size = account * risk per trade / (entry - stop)R-multiple check
entry = 180
stop = 172
target = 204
risk = entry - stop
reward = target - entry
r multiple = reward / riskRunning P/L
trade one = 320 USD
trade two = -140 USD
trade three = 210 USD
totalStart calculating smarter, traders.
Notes Calculator is free to start, runs in your browser, and works on every desktop. Upgrade later for sync and unlimited tabs.
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