Tennis Court Dimensions: Facts, Figures & Measurements

Every competitive advantage in tennis starts with knowing your court.

Tennis is a game of angles, and the player who understands how much space they have to work with makes better tactical decisions. I always tell my students to think of the court in zones, not just as one big rectangle. When you know that the doubles alley is only 4.5 feet wide, you realize how precise your passing shots need to be. This guide covers every official measurement, from baseline to net, so you can use the court’s geometry to your advantage.

Standard Tennis Court Dimensions

The “Rules of Tennis,” published annually by the International Tennis Federation (ITF), specify the precise dimensions of a regulation tennis court. Every measurement in this article is based on the official ITF Tennis Rules, the same standard used at every Grand Slam and ATP/WTA tournament worldwide.

Key Tennis Court Dimensions

A full tennis court measures 78 feet (23.77m) long by 36 feet (10.97m) wide. However, only doubles matches use the entire width. The singles court is 78 feet long and 27 feet (8.23m) wide, which means those doubles alleys sit unused during singles play. Let’s break down each component of the court.

Interactive Court Diagram

Hover over or tap any zone to see its dimensions. Use the toggles to compare tennis court size with pickleball and children’s courts.

Lines of a Tennis Court

Baseline 27 ft / 8.23m (Singles) 36 ft / 10.97m (Doubles)

The baseline runs parallel to the net and defines the back boundary on each side. Most rallies in modern tennis happen within a few feet of this line. Players like Novak Djokovic and Iga Swiatek build their game around controlling the baseline.

Center Mark 4 in / 10 cm long

Players must serve diagonally from the correct side of the court. The center mark, a small 4-inch line at the midpoint of each baseline, divides the deuce and ad sides.

Service Line 27 ft / 8.23m wide

The service line runs parallel to the net, exactly 21 feet (6.40m) from it, marking the midway point between the net and the baseline. Any serve that lands beyond this line is out.

Center Service Line 21 ft / 6.40m long

The center service line runs perpendicular to the net, dividing the two service boxes and defining the deuce and advantage sides of the court.

Singles Sidelines 39 ft / 11.89m long

The singles sidelines mark the outer boundary of the singles court, sitting 13.5 feet (4.11m) from the center on each side. They run the full length from baseline to baseline.

Doubles Sidelines 39 ft / 11.89m long

The doubles sideline runs along the court’s outer edges when the court’s full width is used for doubles play.

The white lines that mark the court are also uniform in thickness. All court lines should be at least 2 inches (5cm) wide, with the baseline up to 4 inches (10cm) wide.

Areas of a Tennis Court

Total Court Area Singles: 2,106 sq ft Doubles: 2,808 sq ft

The singles court covers 2,106 sq. ft (195.7 sq m), while a doubles court covers 2,808 sq. ft (260.9 sq m). That extra 702 sq. ft from the doubles alleys changes the game significantly.

Service Boxes 21 ft x 13.5 ft / 6.40m x 4.11m

Each service box is 21 feet long and 13.5 feet wide. The center service line divides the area between the net and service line into two equal boxes, one on the deuce side and one on the ad side.

Backcourt / No Man’s Land 18 ft x 27 ft / 5.49m x 8.23m

This area between the baseline and the service line is the largest zone on the court. It’s called “no man’s land” because standing here leaves you vulnerable to balls at your feet. Most coaches, myself included, teach players to either commit to the net or stay behind the baseline.

Doubles Alleys 39 ft x 4.5 ft / 11.89m x 1.37m

Each doubles alley is 39 feet long and just 4.5 feet wide. These narrow strips on either side of the court are only in play during doubles. At 4.5 feet, they require precise shot placement to exploit.

Tennis Net Dimensions

The net divides the court into two equal halves and spans the full width between the net posts. A steel cable threaded through the top keeps it taut, and a center strap anchors the net to the court surface.

The ITF standard net height is 3.5 feet / 1.07m (42 inches) at the posts and 3 feet / 0.914m (36 inches) at the center, with a total width of 42 feet (12.80m) between the posts. That 6-inch dip in the center is why you’ll often see players aim passing shots down the middle. It’s the lowest point of the net and gives the best margin for error.

Final Thoughts

Understanding your court’s dimensions gives you a real edge. When you know that the service box is only 13.5 feet wide, or that the net dips 6 inches in the center, you start making smarter shot selections. Take these numbers to the court, visualize the zones, and use the geometry to your advantage.

If you’re still building your tennis foundation, check out our complete guide to tennis rules and scoring.