Position Size Calculator

How to Use the Position Size Calculator

Determine the right position size for any trade based on your account size, risk tolerance, and stop-loss level. Essential for disciplined risk management in crypto and stock trading. The calculator is designed to give a fast answer, but the quality of the answer still depends on accurate inputs and a clear idea of what decision you are trying to support.

1. Enter Account Size, Risk per Trade, and Entry Price using the same units you plan to compare or report.
2. Add Stop-Loss Price and review the inputs before calculating.
3. Read the main position size first, then use the supporting outputs to understand the trade-offs behind that result.
4. Compare your numbers with the worked examples below if you want a quick reasonableness check.

What Your Result Means

Position size converts account-level risk into a trade size you can actually place, making the stop-loss distance central to the final exposure. On this page, the primary output is position size.

Scenario 1: $10,000 account, 1% risk, entry $50,000, stop $47,500. Inputs used: accountSize: 10000, riskPercent: 1, entryPrice: 50000, stopLoss: 47500. Example result: $2,000 position size. With a $100 maximum loss (1% of $10,000) and a $2,500 gap to stop-loss, you can buy 0.04 units, equal to a $2,000 position size.

Formula and Assumptions

Core formula: position size = (account risk / |entry - stop|) * entry price. Risk per trade is converted into a cash amount first, then divided by the stop-loss distance to determine how many units you can buy without exceeding that risk.

1. A tighter stop allows more units for the same risk.
2. If entry and stop are identical, the tool returns zero units to avoid false precision.

When to Use This Position Size Calculator

Use this calculator before entering a trade so the risk plan is defined before emotions or momentum take over. Related paths for follow-up analysis include crypto profit calculator and roi calculator.

Common Mistakes to Avoid

Most bad outputs come from a few repeated input errors or interpretation mistakes. Use this short checklist before relying on the result.

1. Setting the stop loss after choosing a position size instead of before.
2. Ignoring how tighter stops can increase slippage risk in volatile markets.
3. Risking a fixed dollar amount without relating it to total account size.