A tennis court is 78 feet long, and 36 feet wide for doubles or 27 feet for singles — the outer tramlines are doubles alleys. The net stands 42 inches at the posts and 36 inches at center. Service boxes run 21 feet from the net.
The measurements
| Element | Dimension |
|---|---|
| Court length | 78' |
| Doubles width | 36' |
| Singles width | 27' |
| Service boxes | 21' × 13.5' (four) |
| Net height | 42" posts · 36" center |
| Recommended pad | 60' × 120' (min 56' × 114') |
Why the pad is nearly double the lines
Players need 21 feet behind each baseline and 12 feet beside each sideline for real play — that's how a 78' × 36' court becomes a 60' × 120' pad. Skimp on run-back and the court plays cramped forever. One tennis pad also converts cleanly to four pickleball courts — see the conversion guide and the resurfacing guide for what that costs.