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Risk Per Trade Calculator

Check the exact rupee and percentage of capital a planned trade puts at risk if the stop-loss is hit.

Quick answer: The risk per trade calculator measures the downside of a position you have already sized. It multiplies the distance from entry to stop by the quantity to get the rupee loss if the stop triggers, then expresses that as a percentage of your capital. A gentle warning appears when the figure crosses two percent, a common rule-of-thumb ceiling for a single trade.

Trading capital (₹)Quantity (total units)

Entry priceStop price

How to use it

Enter capital, the total quantity you will hold (lots multiplied by lot size), and the entry and stop prices. The output is the rupee loss at the stop and that loss as a percentage of capital. Quantity is in units, so a one-lot Nifty position is 75 units. The calculation excludes charges, which make the real loss slightly larger.

Formula

Rupee risk = |Entry − Stop| × Quantity ; Risk% = Rupee risk ÷ Capital × 100

Quantity is total units held. For lot-based instruments, Quantity = number of lots × lot size.

Frequently asked questions

How is this different from the position size tool?

The position size tool starts from a target risk and gives you a quantity. This tool does the reverse: you supply the quantity and it tells you the resulting risk, which is useful for checking a trade you have already planned.

Why warn at two percent?

Losing more than about two percent on a single trade is a widely cited rule-of-thumb ceiling because a run of such losses erodes capital quickly. The warning is a prompt to reconsider, not a hard rule.

Should quantity be in lots or units?

Units. Multiply lots by the lot size first. One Nifty lot is 75 units, so three lots is 225 units.

Does a wider stop always mean more risk?

For a fixed quantity, yes, because the loss at the stop grows with the entry-to-stop distance. To keep risk constant with a wider stop you must reduce quantity, which the position size tool handles.

Are charges included?

No. The output is pure price risk. Brokerage, STT, exchange and stamp charges plus slippage add to the real loss.

Runs entirely in your browser — no data leaves your device. Illustrative and educational only; real-world charges and market conditions apply in practice.