How to use this position size calculator
- Enter the capital allocated to the trading plan.
- Choose the maximum percentage you are willing to risk.
- Enter the planned entry and stop-loss prices.
- Enter the contract lot size, or use 1 for individual shares.
Why position sizing matters
Position sizing connects a trade idea to a defined amount of capital at risk. A wider stop-loss generally means fewer units for the same rupee risk; a tighter stop-loss generally permits more units, subject to liquidity and execution conditions.
For NSE, BSE, F&O and MCX trades, check the current contract lot size and include transaction costs, slippage, gaps and margin requirements in your own plan.
Common questions
How is position size calculated?
The calculator divides your planned risk amount by the rupee difference between entry and stop-loss, then rounds the result down to complete lots.
What lot size should I enter?
Enter the exchange or contract lot size for the instrument. Use 1 for cash equity or any instrument where you want quantity calculated unit by unit.
Does the result include brokerage and taxes?
No. The result estimates planned price risk only. Brokerage, STT, exchange charges, GST, stamp duty, slippage, gaps and funding costs can change the final outcome.