Position size calculator
Risk a fixed slice of the account per trade and let the stop distance set the size. Quantities floor to the venue step, exactly like an exchange fill.
Your trade
Market
USDT
%
USDT
USDT
x
Position
longPosition size
0.079BTC
raw 0.079744816586 floored to the 0.001 step - never oversized
R value50.00USDT risked at plan
Effective risk49.54after step rounding
Notional5,056.00position value, USDT
Margin @ 5x1,011.20initial margin, USDT
Stop distance627USDT per coin
size = (account × risk%) ÷ |entry − stop|, floored to the venue quantity step - the same ROUND_DOWN the TradeSurge engine applies before an order is placed. Effective risk is what the floored size actually puts at stake.
How it is computed
- R value
- account × risk%
- Position size
- R ÷ |entry − stop|, floored to the qty step
- Notional
- size × entry
- Margin
- notional ÷ leverage
Flooring to the step means the calculator never suggests more size than the venue will accept - your realized risk is always at or below the plan. Trading a prop account? Check the room first with the drawdown calculator and pace the payout with the consistency calculator.