Position size calculator
Position size is how much you buy so that, if your stop is hit, you lose only the amount you planned to risk. Most traders risk 0.5% to 2% of their account per trade.
Enter your account balance, the percent you want to risk, your entry price and your stop loss. Add a target to see your risk-reward ratio and potential profit. It works for stocks, crypto, forex and futures prices, and needs no account.
How the calculation works
Dollar risk = account balance × risk %. Risk per share = entry price − stop price. Position size = dollar risk ÷ risk per share.
So if you risk a fixed share of your account, a wider stop means a smaller position and a tighter stop means a larger one. The loss at your stop stays the same either way.
How to read the results
Shares / units is how many to buy. Position value is what that costs at your entry price.
Risk-reward compares the distance to your target with the distance to your stop. 1:2 means the target is twice as far as the stop.
Fees and slippage are not included. Leave some room for them, especially on short-term crypto trades.
Frequently asked questions
Is the calculator free?
Yes. The position size calculator is free and needs no account.
How much should I risk per trade?
Many traders use 1% to 2% of their account. Lower risk per trade means a losing streak does less damage.
Does it work for crypto and forex?
Yes. Enter prices in the asset's quote currency. For forex lots or futures contracts, divide the units by the contract size.
Where do I get entry, stop and target levels?
Use your own plan, or run AI Chart Analysis on a chart to get suggested levels, then size the trade here.
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Educational analysis only. Not financial advice. Trading involves substantial risk of loss.