# PropFirmMath

> Free prop firm calculators and trading math guides: profit splits, drawdown limits, position sizing and risk of ruin.


## Posts

- [Risk of Ruin: Why Win Rate Alone Won't Save Your Account](https://propfirmmath.com/risk-of-ruin-explained/): Win rate is the stat traders brag about; risk of ruin is the stat that decides whether the account still exists in six months.
- [What You Really Take Home: Prop Firm Payout Math](https://propfirmmath.com/prop-firm-payout-math/): Getting funded is the headline. Collecting is the business.
- [Position Sizing Math: Risk Per Trade Formulas That Pass Evaluations](https://propfirmmath.com/position-sizing-math-risk-per-trade/): Position sizing is the single highest-leverage skill in prop trading.
- [Max Drawdown Rules Explained: The Math That Fails Most Traders](https://propfirmmath.com/max-daily-drawdown-explained/): Drawdown rules kill more funded accounts than bad strategies do, because traders read the percentage and never compute the dollar line.
- [How Prop Firm Profit Splits Actually Work](https://propfirmmath.com/how-prop-firm-profit-splits-work/): "Up to 90% profit split" is the most quoted number in prop firm marketing, and the most misunderstood.
- [Hello world!](https://propfirmmath.com/hello-world/): Welcome to WordPress. This is your first post. Edit or delete it, then start writing!

## Pages

- [Affiliate Disclosure](https://propfirmmath.com/affiliate-disclosure/): PropFirmMath is reader-supported.
- [Disclaimer](https://propfirmmath.com/disclaimer/): All content on PropFirmMath is published for educational purposes only and does not constitute financial, investment or trading advice.
- [Privacy Policy](https://propfirmmath.com/privacy-policy/): PropFirmMath (propfirmmath.com) respects your privacy. This policy explains what data the site handles.
- [Contact](https://propfirmmath.com/contact/): Questions, calculator requests or bug reports are welcome.
- [About PropFirmMath](https://propfirmmath.com/about/): PropFirmMath started with a simple frustration: prop firm rules are written as percentages and marketing, but accounts are lost in dollars and decimals.
- [Prop Firm Calculators & Trading Math](https://propfirmmath.com/): Free, no-signup calculators for funded futures and forex account math: profit splits, drawdown limits, position sizing, and the probability your account survives.
- [Consistency Rule Calculator](https://propfirmmath.com/calculators/consistency-rule-calculator/): A consistency rule says no single day may contribute more than a set percentage of your total profit, often 30-45%.
- [Compounding Calculator for Funded Accounts](https://propfirmmath.com/calculators/compounding-calculator/): Funded account compounding is not the classic "reinvest everything" story, because most firms reset your balance after each payout.
- [Risk of Ruin Calculator](https://propfirmmath.com/calculators/risk-of-ruin-calculator/): Risk of ruin answers the question every prop trader should ask first: given my strategy statistics and the account's drawdown limit, what is the probability the account dies before it pays?
- [Profit Target Calculator (Trades to Pass)](https://propfirmmath.com/calculators/profit-target-calculator/): An evaluation target is not a wish, it is an expectancy problem.
- [Daily Loss Limit Calculator](https://propfirmmath.com/calculators/daily-loss-limit-calculator/): Daily loss limits are the rule that ends the most funded accounts, because they are hit in a single bad session, not over weeks.
- [Max Drawdown Calculator](https://propfirmmath.com/calculators/max-drawdown-calculator/): Every prop account has a maximum drawdown line.
- [Position Size Calculator (Lot Size)](https://propfirmmath.com/calculators/position-size-calculator/): Failing a prop firm evaluation is almost never one bad trade, it is a wrong lot size.
- [Prop Firm Profit Split Calculator](https://propfirmmath.com/calculators/profit-split-calculator/): Most prop firms advertise an "80% profit split" or even "90% up to 100%", but the number that matters is what lands in your bank account after the evaluation is passed and the payout is processed.
- [All Calculators](https://propfirmmath.com/calculators/): All eight calculators, one page. Each one runs entirely in your browser: no signup, no data leaves your device, and results update instantly.


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