Position Size Calculator
Trade with disciplined risk management. Define how much of your account you are willing to lose and where your stop sits, and get the exact position size to take.
Position size
20 units
$2,000.00 position value
- Amount at risk
- $100.00
- Stop distance
- +5.00%
- Position value
- $2,000.00
How it works
First the calculator finds your dollars at risk — your account size multiplied by the risk percentage you are comfortable losing on a single trade. Next it measures the stop distance as the gap between your entry and stop-loss, expressed as a fraction of the entry price. Dividing the dollars at risk by that fraction gives the total position value, and dividing again by the entry price converts it into units.
The result is a position where, if the price hits your stop-loss, your loss equals exactly the amount you chose to risk — no more.
FAQ
What risk percentage should I use?
Many traders risk 1–2% of their account per trade so that a string of losses does not severely damage their capital. The right number depends on your strategy and risk tolerance.
What does the long/short setting change?
It validates your stop placement. A long expects a stop below entry, while a short expects a stop above entry. The position math uses the absolute distance either way.
Does this include leverage or fees?
No. It sizes the position by risk only. Leverage, funding, and trading fees should be considered separately before you enter.
Not financial advice.