Futures Position Size Calculator
This futures position size calculator takes your account, your risk and your stop distance and gives you the contracts you can trade on ES, MES, NQ or MNQ. It always rounds down, then shows the dollars you're really risking and what percent of the account that is.
Contracts, rounded down
2x ES
- Your risk budget
- $500
- Actual dollars at risk
- $400
- Percent of account
- 0.8%
- One ES at this stop
- $200
ES: tick 0.25 points, $12.50 a tick, $50 a point. Your stop is 16 ticks.
How the number works
Position size has one job: make the loss at your stop equal the number you already decided on. So work backward from the loss. Think of your risk as a budget and your stop as the price of one contract. A 4-point stop on ES prices one contract at 4 x $50 = $200. A $500 budget buys two of them, with $100 left over. You can't buy half a contract, so the $100 stays in your pocket.
The stop comes first. Decide where the trade is wrong, then let that distance set your size. A wider stop means fewer contracts, and it's supposed to. The dollars at risk stay the same while the position shrinks to pay for the extra room.
Rounding only goes one way. Round 2.5 up to 3 and you've got $600 at risk, 1.2% of the account on a 1% plan. Do that on every trade and your real risk runs above your written risk, with nothing on your screen to show it. The position sizing guide digs into why doing this math by feel goes wrong under pressure.
The mistakes that blow up the math
The first one catches prop firm traders. A $50,000 account name makes 1% sound like $500. But if your drawdown is $2,000, that's the money you can actually lose, and $500 is a quarter of it. Four full stops and the account's gone. Run the same 1% on the $2,000 and you get $20, which pays for one MNQ at a 10-point stop and no wider. That's a tight stop on NQ, so plenty of setups won't fit, and that's the honest answer for that account. The trailing drawdown calculator tells you how much of that drawdown you've still got.
The second one is picking the size first. "I trade 2 ES" turns the stop into whatever the budget allows. The stop ends up at a price the market has no reason to respect, you get taken out on noise, and the setup goes on without you. Build the check into your pre-trade routine so the size is decided before the trade has your attention.
The third is treating zero as a broken answer. If one contract at your stop costs more than your budget, the calculator is telling you the trade doesn't fit this account. Drop to the micro. If the micro doesn't fit either, you skip it. That's the rule working.
One limit to keep in mind: this is the loss at your stop price. A fast market can fill you worse than that, and commissions come on top. When you're ready to think about size over months instead of one trade, the next contract calculator shows where each bigger size starts.
Worked example: $50,000, 1% risk, a 4-point ES stop
Setup: A $50,000 personal account, 1% risk per trade, trading ES with a 4-point stop.
- Step 1, set the budget: $50,000 x 1% = $500.
- Step 2, price one contract: ES is $50 a point, so 4 x $50 = $200.
- Step 3, divide: $500 / $200 = 2.5 contracts.
- Step 4, round down: 2.5 becomes 2. Never 3.
- Step 5, read the real risk: 2 x $200 = $400, and $400 / $50,000 = 0.8% of the account.
Result: 2x ES, $400 at risk, 0.8% of the account.
Change one thing: widen the stop to 12 points
One ES now costs 12 x $50 = $600, and $500 / $600 = 0.83, which rounds down to 0 ES. On MES, one contract costs 12 x $5 = $60. $500 / $60 = 8.33, which rounds down to 8. 8 x $60 = $480, or 0.96% of the account. Same trade idea, same budget, and only the micro can carry it.
This sizes one trade. The app keeps sizing them.
The calculator works from the account size you typed. UpSkalr reads your real balance as you log or import trades, works out your risk per trade each day, and records whether you kept your rules.
Try UpSkalr free for 7 daysFrequently Asked Questions
How do I calculate futures position size?
Divide the dollars you're willing to lose by what one contract loses at your stop, then round down. One contract loses your stop in points times its point value: $50 on ES, $20 on NQ, $5 on MES and $2 on MNQ. A $500 risk with a 4-point ES stop is $500 / $200 = 2.5, so 2 contracts.
Why does the calculator round down instead of to the nearest contract?
Rounding up means risking more than your plan allows. In a $500 budget at $200 a contract, 2.5 rounded up is 3 contracts and $600 at risk. You can always risk a little less than planned, and that's the only direction a rounding should go.
What does it mean if the answer is zero contracts?
One contract at your stop costs more than your whole risk budget. Check whether the micro fits: the calculator shows how many. If even one micro doesn't fit, skip the trade or wait for a setup with a stop your account can afford. Don't shrink the stop to make the math work.
How much should I risk per trade on futures?
There's no proven number. FTMO's published guidance is a maximum of 1% to 1.5% of the initial balance per trade, and The5ers recommends 1% or less, as read on November 4, 2026. That's firm guidance, not measured evidence. FTMO's 1% sits against a 10% maximum loss, so it works out to about a tenth of the loss limit. On a $2,000 drawdown, a tenth is $200. Treat that as a ceiling, not a target.
Should I use my balance or my drawdown on a prop firm account?
Your drawdown. On a $50,000 account with a $2,000 drawdown, you can only lose $2,000, so that's the capital at work. 1% of $50,000 is $500, a quarter of everything you can lose. 1% of $2,000 is $20.
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Educational tool, not financial advice. These numbers come from what you type. They don't include slippage, commissions or your firm's exact rules, and a stop can fill worse than the price you set. Trading futures involves substantial risk of loss.