Tennis Court Dimensions
Official tennis court measurements for singles and doubles play
What are the Official Tennis Court Dimensions?
Tennis court dimensions are standardised by the International Tennis Federation (ITF) and have remained virtually unchanged since the modern game was codified in the 1870s. The court is a rectangle 23.77 metres long and either 8.23 metres (singles) or 10.97 metres (doubles) wide. These measurements apply to all surfaces — hard, clay, and grass — and all levels of play from club tennis to Grand Slams.
The net divides the court in half at 0.914 metres (3 feet) at the posts and sags to 0.914 metres at the centre strap. Each half is divided into a service box and backcourt. The service boxes are 6.4 metres deep and 4.115 metres wide — the area the serve must land in. The baseline is the farthest boundary from the net.
Surface type significantly affects the game despite having identical dimensions. Clay courts (Roland Garros) produce high-bouncing, slow rallies. Grass courts (Wimbledon) are fast with low bounce. Hard courts (US Open, Australian Open) are medium-paced. The dimensions remain constant but the tactical game changes completely by surface.
How to Use This Calculator
Key Court Zones
- • Service box: 6.40m deep × 4.115m wide — serve must land here
- • No man's land: Baseline to service line — avoid lingering here
- • Alley (doubles): 1.372m wide each side — active in doubles only
- • Baseline area: Most groundstrokes played from here
- • Net clearance: Ball must clear 0.914m net at centre
?Frequently Asked Questions
Are all tennis courts the same size?
Yes — all standard tennis courts are identical in dimensions regardless of surface type, tournament level, or location. The ITF Laws of Tennis specify exact measurements that are used worldwide from local club courts to Wimbledon. The only variation is between singles play (narrower) and doubles play (wider), which uses additional alleys on each side.
Why is the net lower in the middle than at the posts?
The net sags naturally due to gravity and tension, and this sag is intentional and standardised. The net is 1.07m at the posts and 0.914m at the centre. This lower centre point is why cross-court shots are easier to clear than shots hit directly down the line — the net is lower in the middle, giving more margin. Players exploit this by directing most shots cross-court.
How much run-off space is required behind the baseline?
The ITF recommends a minimum of 6.4 metres of run-off space behind each baseline and 3.66 metres on each side, for tournament play. This means a complete singles tennis facility requires approximately 36.57m × 18.29m of total space. Recreational club courts often have less run-off, which is acceptable for club-level play but not for professional tournaments.