Prop Firm Position Size Calculator — Free Futures Sizing Tool | FundedSizer
Free for prop traders · No account needed · 60 seconds

Prop Firm Position Size Calculator

Never blow a prop account from bad position sizing again

You're probably trading the wrong number of contracts right now. This tells you the right number for every account, based on today's drawdown. Takes 60 seconds.

Any firm
Works with every prop firm
1,000
Simulations stress-test your strategy
11,235
Reports generated & counting

Which accounts are you protecting today?

Your drawdown is what's at risk on each account. Enter the real number from today. The calculator uses it to protect all of them at once.

0 accounts · $0 total drawdown
Add an account
$
Your max loss is fixed from your starting balance
$
Set a target to see payout odds & timeline
1

How much are you risking?

1.00% = $0 per trade
Conservative
Drag to adjust risk %
0 consecutive losses before breach

What are you trading?

points

Your Sizing Plan for Today

CONTRACT ALLOCATION
YOUR RISK PROFILE

Can your strategy survive 1,000 trades?

Run a Monte Carlo simulation to stress-test your sizing plan. See your worst losing streaks, blow-up probability, and whether your edge holds up over time.

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Nice — your plan is ready.

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Disclaimers & Risk Disclosure

Last updated: March 2026

General Risk Disclosure

Trading futures, stocks, forex, options, cryptocurrencies, or other financial instruments involves a high degree of risk and is not suitable for all investors. You may lose more than your initial investment. Past performance is not indicative of future results.

No Investment Advice

Nothing on FundedSizer, including calculators, simulations, or educational content, should be considered financial, investment, tax, or other professional advice. All tools are provided for informational and educational purposes only. Users are solely responsible for their own trading decisions. Consult a qualified financial advisor before trading.

Calculator & Simulation Accuracy

Position sizing calculators, expectancy tools, and Monte Carlo simulations use simplified mathematical models that cannot account for all real-world trading conditions including slippage, liquidity, partial fills, platform outages, or sudden market events. Results are estimates only and should not be relied upon as guarantees of performance.

No Prop Firm Endorsement

FundedSizer references third-party proprietary trading firms for calculator compatibility. Inclusion of any firm does not constitute an endorsement, recommendation, or verification. We are not affiliated with, sponsored by, or partnered with any prop firm. Firm rules, fees, and account parameters may change without notice.

Hypothetical & Simulated Results

Hypothetical or simulated performance results have inherent limitations and do not represent actual trading. Results may over- or under-compensate for market factors and are subject to hindsight bias. No representation is made that any account will achieve similar results.

By accessing or using FundedSizer, you acknowledge and agree to these disclaimers. If you do not agree, please do not use the site.