Futures Position Size Calculator
Easily calculate how many futures contracts to trade based on your account size, risk percentage, and stop distance.
For educational use only. Calculations do not account for commissions, exchange fees, NFA pass-through fees, slippage, or broker margin requirements. Results do not constitute trading advice. Futures trading involves substantial risk of loss and is not suitable for all investors.
How to Use This Calculator
- Select your contract from the dropdown.
- Enter your account balance.
- Choose a risk type (percent of account or fixed dollar amount) and enter your risk per trade.
- Set your stop distance in points or ticks.
- Optionally enter an R:R ratio to calculate a dollar profit target.
- Click Calculate position size.
The calculator returns the number of contracts to trade (always rounded down), your total dollar risk, risk per contract, and the percentage of your account at risk. You can also copy results to your clipboard for trade journaling.
What Is Futures Position Sizing?
Position sizing is the process of determining how many contracts to trade on a given setup. It is one of the most important decisions a futures trader makes, because in leveraged markets, size determines how much a wrong call actually costs you.
Position sizing connects your stop-loss placement to your account risk. If you know how far you’re willing to let a trade move against you, and how much of your account you’re willing to lose on that trade, the number of contracts follows from those two numbers.
For a deeper look at how the math works across different account sizes and market conditions, see our full guide: How Futures Position Sizing Works.
The Position Sizing Formula
Contracts = Dollar Risk ÷ (Stop Distance in Points × Point Value)
- Dollar risk is how much you’re willing to lose if the trade hits your stop.
- Stop distance is the number of points between your entry and your stop-loss level.
- Point value is the fixed dollar amount one full point of price movement is worth for that contract.
Example: You have a $2,000 account and decide to risk $30 on a trade, a fixed dollar amount that keeps losses manageable while you build consistency. You’re trading the Micro E-mini S&P 500 (MES), which has a point value of $5. Your stop is 4 points below your entry.
$30 ÷ (4 × $5) = $30 ÷ $20 = 1 contract (round down from 1.5)
Your actual risk is $20 (1 contract × 4 points × $5), which is 1% of the account. If the same setup had a wider 10-point stop:
$30 ÷ (10 × $5) = $30 ÷ $50 = 0.6 → round down to 0
That result tells you the stop is too wide for your risk amount on this contract. The fix is either to tighten the stop to a level that fits the setup, or accept that this particular trade doesn’t fit the account right now.
Always round down to the nearest whole number. Futures contracts cannot be traded in fractions.
Related: Futures Tick Value Explained
Frequently Asked Questions
What is a futures position size calculator?
A futures position size calculator determines how many contracts to trade based on your account balance, the amount you’re willing to risk per trade, and the distance to your stop-loss. It ensures your exposure on any trade stays within a defined risk limit.
How do I calculate position size in futures trading?
Divide your dollar risk per trade by the product of your stop distance in points and the contract’s point value. The result is your maximum number of contracts. Always round down to the nearest whole number, since futures cannot be traded in fractions.
Why is position sizing important in futures trading?
Position sizing is crucial in futures trading because it keeps your losses consistent and prevents over-leveraging. By using a position size calculator, traders can control exposure, reduce emotional decision-making, and trade more systematically.
How does risk percentage affect position size?
A higher risk percentage increases your position size and potential loss if the trade goes against you.
What is point value in futures?
Point value is the fixed dollar amount you gain or lose for every one-point move in a futures contract, per contract. It is set by the exchange. For example, one point on the ES contract is worth $50. On the MES, one point is worth $5.
What’s the difference between points and ticks in futures trading?
A tick is the minimum price increment a contract can move. A point is a full unit of price movement, made up of multiple ticks. On ES and MES, one point equals four ticks. Understanding both is important for calculating stop distances and P&L accurately.
How many contracts should a beginner trade?
Most new futures traders start with one micro contract such as MES or MNQ. The right number of contracts is always determined by the position sizing formula relative to your dollar risk, not by how much margin the account holds.
Why should I use the position size calculator before each trade?
Stop distances change from setup to setup. A position size that fits one trade may be too large or too small on the next. Running the calculation before each trade keeps your actual dollar risk consistent regardless of market conditions.
The content on this page is for informational and educational purposes only and should not be considered trading, investment, tax, or legal advice. Futures trading involves substantial risk and is not suitable for every investor. Past performance is not indicative of future results. You should carefully consider whether trading is appropriate for your financial situation. Always consult with a licensed financial professional before making any trading decisions. MetroTrade is not liable for any losses or damages arising from the use of this content.