Sports
How long is a tennis court?
A tennis court is 23.8 m · 78 ft long.
Tennis court at true scale
- Tennis court 23.8 m · 78 ft
- Tyrannosaurus rex 12 m · 39.4 ft
- New Routemaster bus 11.2 m · 36.9 ft
- Orca up to 9.75 m · 32 ft
Tennis court (blue) beside a Tyrannosaurus rex, a New Routemaster bus and an orca, all on one scale.
The ITF Rules of Tennis define the court as a rectangle 78 ft (23.77 m) long, 27 ft wide for singles and 36 ft wide for doubles. The game measures it from baseline to baseline.
Tennis court dimensions
Singles and doubles use the same 78 ft (23.77 m) court length; the doubles alleys add 4½ ft on each side, and the net is lower in the middle than at the posts.
| Measurement | Size |
|---|---|
| Length, baseline to baseline | 78 ft (23.77 m) |
| Width, singles | 27 ft (8.23 m) |
| Width, doubles | 36 ft (10.97 m) |
| Service lines, from the net | 21 ft (6.40 m) |
| Net height at the centre | 3 ft (0.914 m) |
| Net height at the posts | 3½ ft (1.07 m) |
Source: ITF — Rules of Tennis (2021), Rule 1: The Court (checked 2026-09-29).
Compared with familiar things
- A tennis court is about 2.0× a Tyrannosaurus rex (12 m · 39.4 ft).
- A tennis court is about 2.1× a New Routemaster bus (11.2 m · 36.9 ft).
- A tennis court is about 2.4× an orca (up to 9.75 m · 32 ft).
- A tennis court is about 3.2× a football goal (7.32 m · 24 ft).
Can you guess it by eye?
Play five comparisons featuring a tennis court: resize each object beside a fixed reference, then see how close you were. No sign-up needed.
Play five comparisonsWhat is measured
Court length, baseline to baseline: 23.8 m · 78 ft. ITF Rules of Tennis: the court is a rectangle 78 feet (23.77 m) long.
Source: ITF — Rules of Tennis (2021). Checked 2026-09-28. The silhouette is scaled so this measurement is exact; its other proportions are illustrative.