Position Size Calculator
Estimate shares or lots from your capital, planned risk and stop distance.
This position ties up ₹50,000 — 50% of your ₹1,00,000 capital.
This is an educational calculator, not investment advice — pick a risk-per-trade that fits your own plan. F&O lot sizes are revised periodically by the exchanges on contract review; the autofilled value is a convenience only, so always verify the current lot size with your broker before you trade.
Frequently asked questions
How is position size calculated?
Quantity = planned cash risk ÷ the absolute difference between entry and stop price, rounded down to whole shares or lots. This is planned risk, not a loss cap: gaps, slippage and fees can increase the actual loss.
What risk per trade should I use?
Many disciplined traders risk 0.5%–2% of capital per trade. This is an educational tool, not advice — pick a number that fits your own plan.
PnL Book records your planned risk and actual position on every trade you import — so you can see whether you sized to plan and how discipline maps to your P&L over time, automatically.
Start freePut the numbers in context.
A calculation is a plan. Your journal shows what happened when you traded it.