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Tennis First-Serve Percentage from Serves-In and Serves-Out Calculator

First-serve % = first-serves-in / total-first-serves.

Compute a tennis player's first-serve percentage from a match's serve summary: First-serve % = (first serves in) / (total first serves attempted), expressed as a percentage. ATP/WTA averages: top servers 65-72 %; tour average ≈ 60 %; below 50 % is usually a losing recipe. Also reports double-fault rate from the unforced second-serve faults.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

1st-serve % = first-in / (first-in + first-out).

In depth

Compute a tennis player's first-serve percentage from a match's serve summary: First-serve % = (first serves in) / (total first serves attempted), expressed as a percentage. ATP/WTA averages: top servers 65-72 %; tour average ≈ 60 %; below 50 % is usually a losing recipe. Also reports double-fault rate from the unforced second-serve faults.