F&O Position Size Calculator
Stop guessing how many lots to trade. Enter your capital and risk tolerance — get the exact position size in seconds.
Free to use · No signup required · Works for equity cash & F&O
Result
Why position sizing is the #1 survival skill for F&O traders
Protect your capital
Most retail traders blow up because of a single oversized trade, not a bad streak. A fixed-risk rule limits any one trade to a small % of your capital — even with a 40% win rate, you survive.
Compound consistently
Risk 1% per trade consistently and a 50% win rate with a 2:1 reward-risk ratio grows capital at ~50% annually. Risk 10% per trade and one bad month wipes you out.
Lots, not units
In NSE F&O, positions come in lot sizes. This calculator rounds down to the nearest lot so you never accidentally over-risk because you rounded up.
Track your actual position sizing over time
This calculator gives you the right size for one trade. TradeDNA tracks every trade you make and shows you: how often did you actually follow your own position-size rules?
- ✓Discipline Score — are you sticking to 1% risk?
- ✓Outlier trade detector — catch the blow-up setups
- ✓Segment breakdown — F&O vs equity risk profiles
- ✓Weekly AI report — your biggest behavioural leak
₹499/month · No card required
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Compounding Projector
Project capital growth over 12–36 months given target monthly return and risk parameters.