Free calculators

Trading math calculators

Transparent tools for user-entered values. No market feeds, ticker lookups, setup scores or recommendations.

Privacy by design: calculations run in your browser. Calculator inputs are not intentionally sent to a PreBreakout application server.
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Risk Reward Calculator

Calculate risk per unit, reward per unit and reward-to-risk ratio from values you enter. No market data, signals or recommendations.

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Position Size Calculator

Calculate a hypothetical position size from account value, chosen risk percentage, entry and stop. Inputs stay in your browser.

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Breakout Target Calculator

Calculate a measured-move result from a hypothetical pattern high, low and breakout level. The output is a formula result, not a price forecast.

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ATR Stop Distance Calculator

Calculate a hypothetical stop level from entry, ATR and a multiplier you choose. No multiplier is recommended by the site.

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Drawdown Recovery Calculator

Calculate the percentage gain required to recover from a hypothetical percentage drawdown.

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Break-Even Win Rate Calculator

Calculate the theoretical break-even win rate from a reward-to-risk ratio, before costs and execution effects.

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Trading Expectancy Calculator

Calculate hypothetical expectancy in R from a win rate, average win and average loss that you enter.

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Percentage Move Calculator

Calculate absolute and percentage change between any two positive values.

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Profit and Loss Calculator

Calculate hypothetical gross and net P/L from entry, exit, quantity, direction and optional total costs.

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Average Price Calculator

Calculate a weighted average value for two hypothetical lots using quantities and unit values you enter.

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Distance to Level Calculator

Calculate the absolute and percentage distance between a current value and any reference level you enter.

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Volume Ratio Calculator

Calculate a simple ratio between an observed volume value and a reference average that you supply.

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Range Percentage Calculator

Calculate the absolute width and percentage width of a hypothetical high-low range.

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Gap Percentage Calculator

Calculate the percentage gap between a prior reference close and a new opening value you enter.

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R-Multiple Calculator

Calculate realized or hypothetical R-multiple from entry, stop and exit values you provide.

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Stop Loss Calculator

Calculate stop distance, percentage distance and modeled loss from entry, stop and quantity values you enter. No stop level is recommended.

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Maximum Drawdown Calculator

Calculate maximum peak-to-trough drawdown from an ordered series of positive values you paste. The series stays in your browser.

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Profit Factor Calculator

Calculate profit factor and net sample result from gross profit and gross loss values you enter. No strategy rating, market data or recommendation.

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Win Rate Calculator

Calculate observed win rate from winning and losing outcomes you enter, with optional break-even outcomes kept separate. No strategy rating or forecast.

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