Knowing the exact tennis court dimensions matters whether you’re building a backyard court, coaching junior players, or just settling a debate about the service box.
This guide breaks down every measurement you need, based on official International Tennis Federation (ITF) standards.
Standard Tennis Court Dimensions
Singles Court Dimensions
A singles tennis court is 78 feet long and 27 feet wide. That’s the tightest legal footprint for competitive tennis. The sidelines run the full 78-foot length, marking the outer boundary for singles matches.
Doubles Court Dimensions
A doubles court keeps the same 78-foot length but widens to 36 feet. The extra 9 feet comes from the doubles alleys, a 4.5-foot strip on each side used only during doubles play.
These alleys are the biggest source of confusion for new players, since they sit outside the singles sidelines but inside the doubles boundary.
Tennis Court Dimensions in Feet, Yards, and Meters
For US audiences working in feet, the full court is 78 feet by 36 feet. In yards, that converts to 26 yards long and 12 yards wide. In metric terms, a doubles court measures 23.77 meters by 10.97 meters.
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Tennis Court Layout and Key Areas
Baseline, Service Line, and Center Service Line
The baseline marks each end of the court, 78 feet apart. The service line sits 21 feet from the net on each side, creating the boundary for a legal serve. The center service line splits the service boxes into two equal halves, running perpendicular to the net.
Deuce Court and Ad Court (Service Boxes)
Each side of the court has two service boxes: the deuce court and the ad court. Each box measures 13.5 feet wide by 21 feet long. The deuce court sits on the right side (from the server’s view) and is used when the score is even. The ad court sits on the left and comes into play on advantage points.
No Man’s Land Explained
No man’s land is the open space between the service line and the baseline. Coaches warn players against standing here, since it leaves no time to react to a fast groundstroke or an incoming lob. Understanding this zone helps players position themselves better during rallies.
Net Height and Net Post Dimensions
Net Height at the Center vs. the Posts
The tennis net stands 3 feet tall at the center and 3.5 feet tall at the net posts. This slight dip in the middle is intentional. It gives players a slightly easier target for cross-court shots while keeping the outer edges of the court properly defended.
Net Post Placement and Spacing
Net posts sit 3 feet outside each doubles sideline, spacing them 42 feet apart total. This placement keeps the net taut and level across the entire width of the court, whether it’s set up for singles or doubles.
Indoor vs. Outdoor Tennis Court Dimensions
Ceiling Height Requirements for Indoor Courts
Indoor tennis courts need a minimum ceiling clearance of 35 feet according to ITF guidelines, though many club-level facilities build to 40 feet for extra comfort on high lobs. Lower ceilings restrict shot types and can affect tournament certification.
Run-Off and Clearance Space Around the Court
Beyond the playing lines, ITF standards call for at least 21 feet of run-off behind each baseline and 12 feet on each side. This buffer zone protects players chasing wide shots and gives room for umpire chairs, ball kids, and spectator sightlines at competitive venues.
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Tennis Court Construction Specifications
Court Orientation and Surface Drainage Slope
Outdoor courts should run north to south to reduce sun glare during peak playing hours. Surface drainage typically requires a slope of about 1 inch per 10 feet, allowing rainwater to run off without pooling near the baseline or net.
Line Width and Marking Standards
All boundary lines must be 2 inches wide, except the baseline, which can be up to 4 inches wide. Lines are usually painted in white or yellow for contrast against the court surface, whether it’s clay, hard court, or grass.
FAQ’s About Tennis Court Dimensions
How big is a tennis court in feet?
A doubles tennis court is 78 feet long and 36 feet wide. A singles court is 78 feet long and 27 feet wide.
Are singles and doubles tennis courts the same size?
No. Both share the same 78-foot length, but doubles courts are 9 feet wider due to the added doubles alleys.
What is the standard net height on a tennis court?
The net measures 3 feet tall at the center and 3.5 feet tall at the net posts.
How much space do you need around a tennis court?
ITF standards recommend 21 feet of run-off behind each baseline and 12 feet along each side for safe play.
What is the total area of a tennis court in square feet?
A doubles court covers about 2,808 square feet, while a singles court covers roughly 2,106 square feet.
James Walker is a content researcher and writer specializing in dimensions, measurements, size comparisons, and conversion topics. He creates clear, practical, and easy-to-understand guides that help readers visualize and understand real-world measurements.