Free tool
Enter your account balance, risk percentage, entry, stop, and estimated fees to calculate a risk-based position size before the trade. The calculator also shows notional value and estimated margin. It works without an account, but you should verify the result against your broker's contract size, lot step, and fee schedule.
Free after signup. No paid plan required.
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This is the calculator from your Trevixe workspace. Explore the layout here; enter your own values and calculate inside a free account.
Once signed in, open the risk calculator in the sidebar. No paid plan needed.
Risk budget = account balance × risk percentage ÷ 100. Choose that percentage from your own trading plan; the preset values are examples, not recommendations. Position size should be the output of the risk budget and stop distance, not a number chosen first and justified afterward.
Position size = (risk budget − total estimated fees) ÷ absolute entry-to-stop distance. For a long trade, the stop must be below entry; for a short trade, it must be above. If fees equal or exceed the risk budget, the calculator returns no valid size within that budget.
With a $10,000 account, an illustrative 1% risk, a long entry at $100, a stop at $98, and zero fees, the risk budget is $100 and the stop distance is $2. Dividing $100 by $2 gives 50 units. At a $100 entry, that is $5,000 of notional value. With $4 in total fees, the tradable risk is $96 and the result becomes 48 units.
Leverage changes the estimated margin, not the position size produced by the stop and risk budget. A smaller margin requirement does not make the trade safer. Gaps, slippage, liquidity, and costs you did not enter can make the actual loss larger than the modeled loss at the stop.
The calculation assumes one unit gains or loses one currency unit for each one-unit price move. Stocks and spot crypto can often be checked directly. Forex output is displayed in standard lots, but pip value and account-currency conversion are not modeled. Futures contract multipliers, broker size increments, and liquidation prices are also outside this estimate.
Record the calculated size, entry, stop, risk budget, and estimated fees before execution. After the trade, compare them with the actual fill, commissions, slippage, and realized loss. That turns position sizing from a one-off calculation into a rule you can audit across a sample of trades.
Subtract total estimated fees from your risk budget, then divide the remainder by the absolute distance between entry and stop. Verify the output against the instrument's contract multiplier, pip value, minimum lot, and size increment.
Yes. With the same account risk, a wider entry-to-stop distance produces a smaller position, while a tighter distance produces a larger one. The stop should still follow the setup's invalidation level rather than being moved only to create a preferred size.
No. In this calculator, leverage changes the estimated margin required for the position; it does not change the risk-based size calculated from account risk, fees, and stop distance.
Yes. The calculator works without an account. It is an educational planning estimate, not personalized financial advice or a guarantee that your stop will limit the actual loss.
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