Win Rate to Profit Factor Calculator
Convert a win rate and reward-to-risk ratio into profit factor, the break-even win rate, and the edge per dollar risked.
How it works
Profit factor = (win rate × payoff) ÷ (1 − win rate) · Break-even win rate = 1 ÷ (1 + payoff) · Edge per $ = win rate × payoff − loss rate
Profit factor is gross profit divided by gross loss; anything above 1.0 makes money and most robust systems land between 1.3 and 2.0. It ties together the two levers you control — how often you win and how much you win versus lose. Raising the reward-to-risk ratio lowers the win rate you need to break even, which is why letting winners run and cutting losers short can turn a coin-flip hit rate into a profitable system.
Worked example
With a 50% win rate and a 1.5:1 reward-to-risk ratio, gross wins are 0.5 × 1.5 = 0.75 and gross losses are 0.5, so profit factor is 1.5. The break-even win rate at 1.5:1 is 1 ÷ 2.5 = 40%, so your 50% comfortably clears it, with a 0.25 edge per dollar risked.
Frequently asked questions
What is a good profit factor?
Above 1.0 is profitable before costs. Most durable systems sit between roughly 1.3 and 2.0; values far above that on limited data often signal overfitting rather than a genuine edge.
What is the break-even win rate?
It is the win rate at which wins exactly offset losses for a given reward-to-risk ratio: 1 ÷ (1 + payoff). At 1:1 you need 50%; at 2:1 you need only 33.3%; at 3:1 just 25%.
How does reward-to-risk change what win rate I need?
The bigger your average win relative to your average loss, the lower the win rate you can tolerate. This is why trend systems survive on 35–40% win rates — their large winners drop the break-even bar well below their hit rate.
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Educational estimate, not investment advice. Trading involves risk of loss.