Educational tool: calculations are illustrative and are not investment advice or predictions.
Risk management

Position Size Calculator

Calculate position quantity from account balance, risk percentage, entry price and stop loss.

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Formula-based educational calculator · Tested with worked examples · View methodology

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Example values are pre-filled. Replace them with your own.

How this calculator works

Why position sizing matters

Position sizing starts with the amount you can afford to lose, not the number of shares you want to buy. A wider stop produces a smaller position; a tighter stop produces a larger one for the same planned loss.

Example

With ₹1,00,000 capital, 1% risk, entry at ₹500 and a stop at ₹490, the planned risk is ₹1,000 and risk per share is ₹10. The resulting position is 100 shares.

What is position sizing?

Position sizing converts a risk limit into a tradable quantity. Instead of choosing shares or lots first, define how much of the account may be lost if the stop is reached. The calculator divides that budget—after estimated charges—by the distance between entry and stop, then checks whether the position fits the available buying power.

Position size example

With a ₹1,00,000 account, 1% risk allows a ₹1,000 loss. An entry at ₹500 and stop at ₹490 creates ₹10 risk per share. Before fees and buying-power limits, the risk-based size is 100 shares. Gaps and slippage can make the realised loss larger, so the result is a planning limit rather than a guarantee.

Frequently asked questions

Can this result predict a trade?

No. It only applies a formula to your assumptions. Market prices, fills, fees and outcomes can differ.

Does TradeCalcZen store my values?

Calculations stay in your browser. Turn on Remember my inputs to save a scenario locally; turn it off to remove that saved scenario. No calculator values are sent to our servers.

Related calculators

Brokerage ComparisonPosition SizeRisk / RewardStop Loss

Learn with a worked example

How to Calculate Position Size