Free Online Position Size Calculator
Determine how much to buy or sell based on how much of your account you are willing to risk.
Free, with no paywall or watermark
No sign-up or account required
Runs instantly in your browser
Calculations stay on your device
Calculator
Position size (units)
0.05
Position value
2,500
How to use
- 1
Enter account balance
Input your total trading account balance.
- 2
Set risk and prices
Define risk %, entry price, and stop-loss price.
- 3
Read position size
The calculator shows units and notional position value.
Frequently asked questions
What risk percentage should I use?
Many traders use 0.5–2% per trade, but it depends on your strategy and tolerance.