Free trading calculators for Indian traders
Work out how many shares or lots to buy with the 1% rule, check a trade's risk-reward before you enter, and see the contract value and rough margin of a Nifty, Bank Nifty or XAUUSD position. Everything runs in your browser; nothing is saved or sent.
Position size calculator (1% rule)
The 1% rule: never lose more than a fixed share of your capital on one trade. Enter your capital, the % you are willing to risk, your entry and your stop-loss.
Risk-reward calculator
Compare what you can lose with what you hope to make, and see the win rate you need just to break even (before brokerage and taxes).
Lot size & margin calculator
Pick the contract, enter the price and number of lots, and the margin rate your broker shows. Index lot sizes below are the NSE/BSE values as of our last r in October 2026 (Nifty 65, Bank Nifty 30, Fin Nifty 60, Midcap Select 120, Sensex 20). The exchanges revise them from time to time, so check the current contract specification before you trade. XAUUSD uses the common 100-ounce standard lot; your broker's contract may differ.
These calculators do arithmetic only. They are not advice and do not include brokerage, taxes, slippage or exchange margin changes. Index futures margins (SPAN + exposure) change daily; your broker's margin calculator has the exact figure. Option buyers pay the premium, not the futures margin.
Want the rules behind these numbers?
The free course walks through a full trading routine, and the guides explain the 1% rule and lot sizes with worked examples.