Control Trading Risk
Set a clear maximum loss for each trade before committing your capital.
Risk Management Calculator
Position Size Calculator
Calculate the appropriate position size for your trade based on your account balance, risk percentage, entry price, and stop-loss level.
Trade Details
Enter your trade information below to calculate a risk-controlled position size.
What Is a Position Size Calculator?
A Position Size Calculator is a risk management tool that helps traders determine how many shares, units, coins, or contracts they should purchase in a trade. Instead of choosing a position size based on emotion, the calculator uses your account balance, risk tolerance, entry price, and stop-loss price.
Correct position sizing can help protect your trading account from oversized losses. Even when a trade does not perform as expected, your potential loss remains close to the risk limit you selected before entering the position.
Use Consistent Sizing
Apply the same risk management method across different assets and trades.
Protect Your Capital
Avoid placing an excessive percentage of your account into a single setup.
Position Size Formula
The calculator first determines your maximum risk amount. It then divides that amount by the difference between your entry price and stop-loss price.
Position Size Formula
Position Size = Risk Amount ÷ Risk Per Unit
For example, suppose your account balance is $10,000 and you want to risk 1% on a trade. Your maximum risk amount is $100. If the entry price is $100 and the stop-loss price is $95, your risk per unit is $5.
Dividing the $100 risk amount by the $5 risk per unit produces a recommended position size of 20 units.
How to Use the Position Size Calculator
1
Enter Your Account Balance
Add the total trading capital you currently have available in your account.
2
Choose Your Risk Percentage
Enter the percentage of your account that you are prepared to lose if the stop-loss is reached.
3
Add Entry and Stop-Loss Prices
Enter your planned entry price and the price where you will exit the trade to limit your loss.
4
Review the Position Size
The tool will display the recommended number of units, total position value, risk amount, and risk-to-reward ratio.
Why Position Sizing Matters
Position sizing is one of the most important parts of a structured trading strategy. A profitable strategy can still produce serious losses when individual trades are too large. Similarly, a trader can experience several losing trades without severely damaging the account when each position is sized carefully.
Account Balance
Your account balance determines how much capital is available. The calculator uses this amount as the base for calculating your maximum risk.
Risk Percentage
Risk percentage represents the portion of your account you are willing to lose on one trade. Many traders use a relatively small percentage to reduce the effect of a series of losing trades.
Stop-Loss Distance
A wider stop-loss creates a larger risk per unit and therefore a smaller position size. A tighter stop-loss creates a smaller risk per unit and may allow a larger position size.
Frequently Asked Questions
Position size is the number of shares, units, coins, or contracts included in a trade. It determines how much capital is exposed to market movement.
Position size is calculated by dividing your maximum risk amount by the difference between your entry price and stop-loss price.
The appropriate percentage depends on your strategy, financial situation, market experience, and tolerance for loss. Many traders choose a small percentage, but there is no universal percentage suitable for everyone.
Yes. The calculator can be used for assets priced per unit, including stocks, cryptocurrencies, commodities, and similar instruments.
No. The basic calculation does not automatically include commissions, spreads, funding charges, taxes, or slippage. These costs should be considered before placing a trade.
Disclaimer: This calculator is provided for educational and informational purposes only. It does not provide financial or investment advice. Trading involves risk, and actual results may differ from calculated estimates.