Position Size Calculator for Indian Stocks
Calculate exact quantity to buy or sell based on your capital and risk per trade — NSE, BSE & F&O.
This is an educational tool. Actual position sizing should account for liquidity, circuit limits, and your broker's margin requirements. Not SEBI registered advice.
What is Position Sizing in Stock Trading?
Position sizing is the process of determining how many shares or contracts to buy or sell in a single trade based on your account size and risk tolerance. It is one of the most important concepts in risk management for traders on NSE and BSE. Without proper position sizing, even a profitable trading strategy can lead to significant losses due to over-exposure in a single trade.
The position size calculator india approach used here is a fixed-fraction risk model: you decide how much of your capital you are willing to lose if the stop loss is hit, and the calculator converts that into quantity. It is intentionally simpler and more conservative than full Kelly-style sizing.
How to Use This Position Size Calculator
Enter your total trading capital, the percentage of capital you are willing to risk on this trade (most professional traders recommend 1–2%), your planned entry price, and your stop loss price. Click Calculate to get the exact quantity to buy or sell.
- Total Capital: Your full trading account balance in Indian rupees.
- Risk per Trade: The percentage of capital you are comfortable losing if the trade hits your stop loss. Start with 1% if you are new to position sizing nse.
- Entry Price: The price at which you plan to enter the trade.
- Stop Loss Price: The price at which you will exit the trade to limit losses. For long trades, this is below entry; for short trades (including intraday shorting), this is above entry.
Position Size Formula
Example Calculation
Inputs: Capital ₹5,00,000 | Risk 1% | Entry ₹500 | Stop Loss ₹480
Risk Amount = ₹5,00,000 × 1% = ₹5,000
Risk per Share = |₹500 − ₹480| = ₹20
Quantity = FLOOR(₹5,000 ÷ ₹20) = 250 shares
Position Value = 250 × ₹500 = ₹1,25,000 (25% of capital)
SEBI / NSE Guidelines on Risk Management
SEBI's margin framework requires brokers to collect and maintain prescribed margins for leveraged products including F&O. Intraday leverage policies are broker-specific and can change with volatility or internal risk controls. This calculator helps you determine position size before considering leverage — always verify the actual margin available with your broker.
Source: SEBI Circular SEBI/HO/MRD/MRD-PoD-3/P/CIR/2021/582 on margin requirements and risk per trade calculator india frameworks.
Frequently Asked Questions
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Many traders keep risk per trade around 1–2% of capital because smaller fixed-fraction risk usually keeps drawdowns more manageable than oversized positions. Beginners often start even lower until they have a strategy with a proven edge and stable execution.
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Yes. For futures, use the futures price as the entry price. Then divide the share-equivalent quantity by the current exchange lot size for that contract to convert the result into lots. Lot sizes are revised periodically, so always check the latest contract specification before placing the order.
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No. Lot size is the minimum contract quantity fixed by NSE and cannot be changed. Position sizing tells you how many lots to trade based on your individual capital and risk parameters. You may find that your ideal position size is 1.7 lots — in which case you would round down to 1 lot to stay within your risk limit.
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Yes. For short trades your stop loss will be above your entry price. The calculator uses the absolute difference between entry and stop loss, so it works correctly for both long and short positions including intraday short selling on NSE equity and F&O short positions.