TOOLS · RISK MANAGEMENT
Position Size Calculator
Calculate how many shares or units you can take based on your trading capital, risk per trade and stop-loss distance.
Calculator
Results
Recommended Quantity
250 sharesBased on 1% risk and a stop-loss distance of ₹10Risk Amount
₹2,5001% of trading capitalRisk per Share
₹10|Entry − Stop Loss|Position Value
₹1,25,000Quantity × Entry PriceCapital Used
50%Position value ÷ Trading capitalMaximum Loss at Stop
₹2,500If stop-loss is hitThis position uses 50% of your trading capital. Ensure you have sufficient capital and consider overall portfolio risk.
Trade Setup Summary
| Direction | Entry Price | Stop Loss | Risk per Share | Quantity | Total Risk | Position Value |
|---|---|---|---|---|---|---|
| Long | ₹500 | ₹490 | ₹10 | 250 | ₹2,500 | ₹1,25,000 |
Worked Examples
Compare how direction and stop-loss distance affect quantity while the risk budget stays the same.
Long trade
Long (Buy)- Trading capital
- ₹2,50,000
- Risk per trade
- 1%
- Risk amount
- ₹2,500
- Entry price
- ₹500
- Stop-loss price
- ₹490
- Risk per share
- ₹10
A ₹10 stop distance gives 250 shares within a ₹2,500 risk budget.
Short trade
Short (Sell)- Trading capital
- ₹2,50,000
- Risk per trade
- 1%
- Risk amount
- ₹2,500
- Entry price
- ₹500
- Stop-loss price
- ₹510
- Risk per share
- ₹10
The stop is above entry. The same ₹10 distance gives the same quantity and planned risk.
Wider stop-loss
Long (Buy)- Trading capital
- ₹2,50,000
- Risk per trade
- 1%
- Risk amount
- ₹2,500
- Entry price
- ₹500
- Stop-loss price
- ₹480
- Risk per share
- ₹20
A ₹20 stop distance halves the quantity to 125 shares while keeping planned risk at ₹2,500.
Learn About Position Sizing
Start with the amount you are willing to risk, then use your trade setup to calculate a quantity.
What is Position Sizing?
Position sizing is the process of deciding how many shares or units to trade. This calculator connects that quantity to your trading capital, chosen risk percentage and stop-loss distance.
A position’s value and its planned risk are different. For example, 250 shares at ₹500 have a position value of ₹1,25,000, while a ₹10 stop distance gives a planned loss of ₹2,500.
How It Works
- Choose a risk percentage and calculate its rupee amount from your trading capital.
- Set an entry and a stop-loss: below entry for a long trade, above entry for a short trade.
- Divide the risk amount by the stop distance, then round the quantity down to whole units.
- Check position value, available capital and any instrument-specific lot or margin rules.
Why It Matters
The same number of shares can carry very different risk across trade setups. A wider stop distance increases the planned loss per share, so a fixed risk budget calls for a smaller quantity.
Consistent sizing helps you compare trades and avoid increasing exposure simply to recover a previous loss. Consider total portfolio exposure too: several positions can move against you together. Explore Risk Management for more context.
Position Sizing Formula
Risk Amount = Trading Capital × (Risk % ÷ 100)
Risk per Unit = |Entry Price − Stop Loss|
Quantity = floor(Risk Amount ÷ Risk per Unit)
Maximum Loss at Stop = Quantity × Risk per Unit
The quantity is rounded down so its planned stop-loss risk stays within the chosen budget. Actual execution, gaps and charges can change the final loss.
Key Takeaways
- Set a small, predefined risk percentage that fits your trading plan.
- Choose a clear stop-loss before calculating your quantity.
- When volatility calls for a wider stop, reduce quantity to keep the same risk budget.
- Consistent sizing supports discipline; avoid increasing size to recover losses.
- Check capital and lot requirements separately. Margin availability does not define an appropriate risk limit.
Related Tools
FAQs
What is a position size calculator?
It estimates how many shares or units fit your chosen risk budget, using your trading capital, risk percentage and the distance between entry and stop-loss.
Why is position sizing important?
It links trade quantity to a planned loss limit. Using the same method across trades helps keep risk consistent even when prices and stop distances differ.
What risk percentage should I use?
The calculator does not prescribe a percentage. Choose a limit that fits your trading plan and total portfolio exposure. The 1% default is an example, not a recommendation.
Can I use this for intraday trading?
Yes. Enter your planned entry and stop-loss, then select Long or Short. Separately check available funds, broker rules, fees and execution risk before deciding your order quantity.
Does a larger stop-loss mean a smaller position size?
Yes. For the same risk budget, a wider distance between entry and stop-loss means fewer shares or units. A tighter distance allows a larger calculated quantity, but does not make a trade safer by itself.
Can I use this for options trading?
The arithmetic can help estimate units for a simple option-premium entry and stop. It does not model option Greeks, contract multipliers, lot sizes, expiry or multi-leg positions. Convert units to valid lots and assess the option strategy separately.
Is position sizing only for stocks?
No. The risk-budget method can apply to other instruments when prices and quantities use consistent units. This page labels quantity as shares; contract-based instruments need their applicable lot size and multiplier.
Does this calculator include brokerage and charges?
No. The displayed risk assumes an exit at the entered stop price. Brokerage, taxes, exchange charges, slippage and price gaps can change the actual cost or loss.