What is the Win Rate / Expectancy Calculator?
The Win Rate / Expectancy Calculator is a free online tool that helps you expectancy from win rate and R:R It runs entirely in your browser, gives an instant result, and needs no sign-up, download or spreadsheet.
A trading edge is win rate combined with average win versus average loss; expectancy tells you whether, over many trades, the system makes money at all.
Whether you trade stocks, forex, options, crypto or futures, the win rate / expectancy is the same calculation — so this tool works for any market. Use it before you place a trade to base your decision on real numbers instead of a guess.
How to use the Win Rate / Expectancy Calculator
Using the win rate / expectancy calculator takes only a few seconds:
- Enter your figures in the win rate / expectancy calculator above — the fields are filled with an example you can replace.
- Read the highlighted result; it updates instantly as you type.
- Add your broker’s fees or commissions where relevant for a true net figure.
- Change any input to compare scenarios before you commit to the trade.
Win Rate / Expectancy formula & example
The win rate / expectancy formula is: Expectancy = (win % × avg win) − (loss % × avg loss).
When to use the Win Rate / Expectancy Calculator
Reach for the win rate / expectancy calculator whenever you’re planning a trade and need to know your win rate / expectancy in advance. Running the number first keeps your decisions consistent and stops a single trade from doing outsized damage to your account. Traders who make this a habit — checking before every entry — are the ones who protect their capital over the long run.
Why use a win rate / expectancy calculator?
Doing win rate / expectancy by hand is slow and error-prone — a misplaced decimal or a forgotten fee can turn a winning plan into a losing one. The win rate / expectancy calculator removes that risk: it applies the correct formula every time, updates the moment you change an input, and lets you test several scenarios in seconds.
That speed matters in live markets. When a setup appears you can size it, check the reward against the risk, and act before the opportunity passes — without second-guessing your arithmetic.
- Instant, accurate win rate / expectancy with no spreadsheet
- Free, with no account, login or download
- Works on mobile and desktop, right in your browser
- Useful for stocks, forex, options, crypto and futures
Tips for accurate win rate / expectancy
- Use your real entry, exit and size — not round-number guesses.
- Include fees and spread; small costs add up across many trades.
- Recalculate whenever your price, size or stop changes.
- Round against yourself to leave a margin for slippage.