Free, no-signup calculators for funded futures and forex account math: profit splits, drawdown limits, position sizing, and the probability your account survives. Built by traders who automate this stuff daily.
What you really take home from a funded account.
The exact lot size for your stop loss and risk %.
Your exact breach point in dollars.
How much room is left in today’s session.
Expected trades to pass your evaluation.
The probability the account dies before it pays.
Keep profit in the account vs monthly payouts.
Check your payout passes the consistency rule.
Why prop firm math beats prop firm hype
Prop firm marketing sells the 90% split and the dream account. The math decides who keeps it: a 5% daily loss limit is a cliff you can step off in one session, a trailing drawdown quietly follows your best equity up, and a consistency rule can reject a payout you already earned. Every calculator on this site exists because a rule like that has a formula, and formulas can be checked before money is on the line.
Start with the account rules, in dollars
Open your prop firm’s rules page, enter the percentages into the max drawdown calculator and the daily loss limit calculator, and write the dollar floors on a sticky note. Traders who know the exact breach number trade smaller than traders who only know the percentage. That single habit separates most funded accounts from most failures.
Guides
How prop firm profit splits actually work · Max daily drawdown rules explained · Position sizing math for evaluations · Prop firm payout math · Risk of ruin, explained
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PropFirmMath is an independent educational site. Nothing here is financial advice. Trading involves substantial risk of loss.