Free calculator
If you win this share of points, how often do you win?
Matches turn on a few points in every hundred. Move the slider and see how far a small change goes.
Your chance on each point
Chance of winning the match
70%
How this works
This is a simple scoring model. Each point is treated as independent and at the same chance. It ignores the serve, the return and pressure, so read it as a picture of how scoring works, not a forecast of your next match.
Two numbers that are easy to mix up
This page uses your chance on each point. That is different from the share of points you actually won in one match, which moves around a lot. One match is a snapshot; several matches are a trend.
Why we call it 55
One of the greatest players of all time won 54% of the points played. 55 is what we help players aim for. It is an aim, never a promise.
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See where your points went
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