Indian F&O Risk Tool

Indian Option Risk Calculator

Calculate risk per lot, maximum position size, capital required, and adjusted risk-reward before entering an options trade.

No login required
Calculations stay in your browser
Editable lot sizes
Includes slippage and charges

Enter your trade details

Use your planned entry, stop-loss, target, and maximum acceptable risk.

How do you define risk?

Trading capital Capital currently available for this options position.

Maximum risk percentage Percentage of total capital you accept losing.

Contract details

Instrument Lot size remains editable for every instrument.

Lot size Verify the current contract size with the exchange or broker.

Price levels

Entry premium Planned option-buying entry premium.

Stop-loss premium Price at which you plan to exit the losing position.

Target premium optional Add a target to calculate adjusted risk-reward.

Lots you plan to take We will compare this position with your entered limits.

Trading friction

Expected slippage points Extra adverse price movement expected during execution.

Estimated charges per lot Enter an estimated round-trip cost per lot.

Your risk result will appear here

Enter your trade details and calculate to see permitted lots, planned position risk, capital required, and risk-reward.

Within risk limit

Your planned position fits

Your planned position remains within the entered risk and available capital.

Maximum executable position 0 lots

Risk budget

₹0

Adjusted risk per lot

₹0

Lots permitted by risk

Lots affordable by capital

Planned position risk

₹0

Adjusted risk-reward

—

Stop-loss distance 0 points

Premium required per lot ₹0

Capital required for planned lots ₹0

Planned quantity 0

Risk budget remaining ₹0

Maximum one-lot stop distance 0 points

Estimated planned reward —

Important: Stop-loss execution is not guaranteed. Fast markets, gaps, slippage, charges, and contract changes can increase actual losses.

Calculation Method

How LotLogic calculates option risk

The calculator first determines the maximum loss you have selected, then compares that limit with the estimated risk and premium required for each lot.

Core formulas


            Risk budget = Capital × Risk percentage
            


            Price risk per lot = |Entry − Stop| × Lot size
            


            Adjusted risk per lot = Price risk + Slippage + Charges
            


            Maximum lots by risk = Floor(Risk budget ÷ Adjusted risk per lot)
            


            Final lots = Lower of risk-permitted lots and capital-affordable lots

Worked Example

₹12,000 capital with a ₹500 risk limit

Assume an option entry at ₹20, a stop-loss at ₹13, and a lot size of 65.

Stop distance 7 points
Price risk per lot 7 × 65 = ₹455
Premium required per lot 20 × 65 = ₹1,300
Maximum lots permitted by risk 1 lot
Risk budget remaining ₹45 before costs

Educational calculator, not investment advice

LotLogic provides mathematical estimates based only on the values entered by you. It does not recommend securities, strikes, entries, exits, quantities, or trades. Verify lot sizes, charges, margins, and exchange specifications before placing an order.