Tools · Position size
Position size calculator
Work out how many shares to buy from your capital, the risk percent you accept, your entry, and your stop-loss. Get the rupee at risk and the reward-to-risk (R-multiple) on a target. Built for NSE traders. No login.
The answer
To size a stock position, divide the rupees you are willing to lose (your capital times your risk percent) by the per-share distance from entry to stop-loss: on a 1,00,000 account risking 1 percent (1,000) with a 50-rupee stop, you buy 20 shares and risk exactly 1,000 if the stop hits.
BazaarBaaziSource & method
Size your tradeInstant · in your browser
Enter capital, the risk percent you accept, your entry, and your stop. The share count, the rupee at risk, and the reward-to-risk update as you type. Nothing is sent anywhere.
20 shares
Buy 20 shares at 1,450 (long), a position of 29,000, risking 1,000 if the 1,400 stop is hit, which is 1 percent of a 1,00,000 account.
Capital at risk
₹1,0001% of account
Risk / share
₹50.00entry to stop
Position value
₹29,0000.29x capital
Budgeted risk
₹1,0001% cap
R-multiple helper · reward to risk
R-multiple
3.00Rhealthy: 2R or better
Reward at target
₹3,000on 20 shares
Risk on this trade
₹1,000if stop hits
Method: risk per share = the gap from your ₹1,450 entry to your ₹1,400 stop. Shares to buy = floor of (capital × risk percent) ÷ risk per share, so a stop-out costs no more than your budgeted 1 percent of capital. R-multiple = the move from entry to target measured in units of that per-share risk. Figures are pre-tax and pre-brokerage and ignore slippage; treat them as a sizing guide, not a guarantee. FY25-26, NSE cash and F&O context.
Why size by risk, not by rupeesThe method
The discipline that separates a survivable account from a blown one.
Most retail losses are not bad picks, they are bad sizing. Buying "as many as I can afford" ties your loss to the share price instead of to a plan. Sizing by risk flips it: you decide the most you will lose on the trade first, usually 0.5 to 2 percent of capital, and the stop distance then dictates the quantity. A wide stop means fewer shares, a tight stop means more, but the rupee loss if you are wrong stays constant. That is what lets a normal losing streak stay survivable.
The R-multiple is the other half. Once your risk is fixed at 1R, every target is just a multiple of it. A setup that risks 1R to make 2R can be wrong more often than it is right and still compound. Pairing a fixed-fraction size with a 2R-or-better target is the simplest edge-preserving rule on the desk, and it is built into the tool above so you read both numbers before you commit capital.
FAQ5 reader questions · AEO-eligible
Position sizing and risk, distilled and schema-marked for AI Overview, Perplexity, and reader search.
How do I calculate position size from my risk?
Multiply your capital by the percent you are willing to risk to get the rupees at risk, then divide by the per-share distance from your entry to your stop-loss. On 1,00,000 at 1 percent risk with a 50-rupee stop, that is 1,000 divided by 50, so 20 shares.
What percent of capital should I risk on one trade?
Most disciplined traders risk 0.5 to 2 percent of capital per trade. At 1 percent on a 1,00,000 account you lose 1,000 if the stop hits, so it takes a long run of losers to do real damage. Higher than 2 percent and a normal losing streak can wreck the account.
What is an R-multiple?
R is your risk on the trade, the rupees you lose if the stop hits. An R-multiple measures the move from entry to target in units of that risk. A target 100 away on a 50-rupee stop is a 2R trade, so a winner pays twice what a loser costs. A 2R floor is a common rule.
Does the position size include brokerage and tax?
No. The shares-to-buy figure is the raw risk-based size. Brokerage, STT, GST, stamp duty, and slippage are extra and reduce your net reward. Use the brokerage calculator alongside this to see the all-in cost of the trade before you place it.
Can I use this for short trades and F&O?
Yes for direction: put the stop above your entry and the tool reads it as a short and still sizes it. The share count is cash-segment logic. For F&O, treat the output as the underlying-equivalent quantity, then convert to lots and check that the margin fits your capital.
Related tools and reading
Size the trade here, then cost it, project it, and read the name.