Free tools · no sign-up
Do the arithmetic before the trade.
Three calculators for Indian equity and F&O traders. They run in your browser on the numbers you type — no market data, no tips, nothing sent to us.
Position size calculator
How many shares or lots to buy so a stop-out costs no more than the share of capital you chose.
Open →Brokerage & charges calculator
Every charge on a round trip — brokerage, STT, exchange, SEBI, stamp duty, GST — and the net P&L.
Open →Option payoff at expiry
Breakeven, maximum loss and profit, and P&L around the strike for one call or put, bought or sold.
Open →Why these three
Most trading losses start with a position that was too big, costs nobody counted, or an option bought without knowing where it breaks even. Each tool answers one of those before you place the order. To understand the ideas behind them, see Learn.