OhMyCalc

Position Size Calculator

Calculate optimal trade position size based on account balance, risk percentage, entry price, and stop-loss level.

How to Use the Position Size Calculator

  1. Enter your total account balance.
  2. Enter the percentage of your account you want to risk.
  3. Enter the planned entry price and stop-loss price.

クイックリファレンス

変換元変換先
$10K account, 2% risk$200 max loss
$50K account, 1% risk$500 max loss
$200 risk, $2 stop distance100 shares
Conservative risk0.5–1% per trade
Moderate risk1–2% per trade

使用例

計算式

Position Size = floor((Account × Risk% / 100) / |Entry − Stop Loss|).

よくある質問

What risk percentage should I use?
Most traders risk 1–2% per trade. Never risk more than you can afford to lose.
Does this work for short positions?
Yes, the calculator uses the absolute difference between entry and stop-loss.
Is it free?
Yes, all calculators are completely free.