Calculate first serve percentage from serves in and total attempts.
The serve percentage is the share of first serve attempts that first serves in represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small. Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where higher is better.
Tennis Serve Percentage
First Serve Percentage = First serves in ÷ First serve attempts × 100
These figures are estimates based on population-average formulas and are intended for training and recreational planning only. They are not medical advice. Consult a qualified health professional before starting or changing an exercise programme, particularly if you have an existing medical condition.
First Serve Percentage = First serves in ÷ First serve attempts × 100 The serve percentage is the share of first serve attempts that first serves in represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small.
Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where higher is better.
This calculator takes 2 inputs: First serves in, First serve attempts. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.