Break-Even Win Rate Calculator: The Win Rate Your R Demands
At 1:2 you need to win a third of the time. That is the famous version. The useful version adds the spread and commission you pay on every trade, which quietly raises the bar.
Your break-even win rate is 1 divided by (1 plus your reward:risk). At 1:1 you need more than 50%, at 1:2 you need 33.3%, at 1:3 just 25%. Costs raise that bar, because spread and commission shrink every winner and enlarge every loser, and they bite hardest when your stop is small.
Break-even win rate
Textbook: 1 ÷ (1 + R). With costs: costs shrink each winner and enlarge each loser, so the required win rate rises. Both are shown.
The formula
Break-even win rate = 1 ÷ (1 + R), where R is your reward-to-risk ratio. At 1:1 you need more than 50%; at 1:2, 33.3%; at 1:3, 25%. That is the arithmetic every trading course quotes.
Now add the costs
Every trade pays the spread, and usually commission, whether it wins or loses. Those costs shrink the winner and enlarge the loser, so the real break-even win rate is higher than the textbook one. The calculator shows both, so you can see exactly how much of your edge the costs are eating - and why high-frequency approaches need a much better hit rate than they look like they do.
A better R usually comes from a better entry location. Chart Bound drills reading those locations, free.
Play free, no signup →What it means in practice
- A low break-even win rate is not a free lunch. Bigger targets are hit less often, and a 1:5 plan with a 15% hit rate produces long losing runs that are hard to sit through - see the risk of ruin calculator.
- Your realised R is not your planned R. Moving stops and taking profit early both pull the real number down. Measure it from a journal.
- Costs matter more the smaller your stop. A two-pip spread against a ten-pip stop is 20% of your risk before the trade starts.
The honest use
This calculator does not tell you whether you can hit the number. It tells you what the number is, so you can compare it with your measured win rate instead of your impression of it. If the measured rate is below the break-even rate, the plan needs a change in R, in costs, or in selectivity - not a bigger position.
Frequently asked questions
What is a break-even win rate?
The percentage of trades you must win, at your reward:risk, just to finish flat. Below it you lose money over time, however good any single trade looks.
Do trading costs change the break-even win rate?
Yes, and by more than most people expect on small stops. The calculator shows the with-costs number next to the textbook one.
Is a low win rate bad?
Not by itself. A 30% win rate at 1:3 is profitable on paper; the difficulty is psychological, because the losing runs are long.
How do I know my real win rate?
Only from a logged sample of your own trades. Anything else is an estimate flattered by memory.
Embed this calculator on your site
Free to use, on any site, with no signup: paste this one line where you want the tool to appear. It loads our hosted version, so it stays up to date, and the link under it credits back to this page.
420×620 by default and it scales down to fit a narrower column. Please keep the attribution link.
Keep learning
A better R usually comes from a better entry location. Chart Bound drills reading those locations, free.
Play free, no signup →