A tennis court may look like a simple rectangle, but every line and measurement has a specific purpose. From the baselines and sidelines to the service boxes and net, the dimensions are carefully defined to create a consistent playing area. Understanding these measurements makes it easier to follow the layout of the court, whether you are playing a match, marking a new court, or simply trying to understand the different lines.
The standard tennis court dimensions remain the same for the length, while the width changes depending on whether the court is being used for singles or doubles. A standard court is 23.77 metres (78 feet) long, 8.23 metres (27 feet) wide for singles, and 10.97 metres (36 feet) wide for doubles. The court also has specific measurements for the service lines, doubles alleys and net height.
What are the Standard Tennis Court Dimensions?
A standard tennis court is 23.77 m (78 ft) long. The playing width is 8.23 m (27 ft) for singles and 10.97 m (36 ft) for doubles. The additional width in a doubles court comes from the two doubles alleys positioned outside the singles sidelines.
The main dimensions you need to know are:
- Court length: 23.77 m (78 ft)
- Singles court width: 8.23 m (27 ft)
- Doubles court width: 10.97 m (36 ft)
- Doubles alley width: 1.37 m (4.5 ft) on each side
- Distance from net to service line: 6.40 m (21 ft)
- Net height at centre: 0.914 m (3 ft)
- Net height at posts: 1.07 m (3.5 ft)
These measurements define the playing court itself. The additional space around the court, such as the area behind the baselines and beside the sidelines, is separate and can vary depending on the type of facility and level of competition. Court measurements are taken to the outside of the lines.
Tennis Court Dimensions in Metres and Feet
For anyone looking for the tennis court size in feet and metres, the following table provides the key measurements in both units. The court length stays at 23.77 m (78 ft) for both singles and doubles. The main difference is the width, as doubles uses the additional space provided by the two alleys.
| Court Feature | Metres | Feet |
| Court length | 23.77 m | 78 ft |
| Singles width | 8.23 m | 27 ft |
| Doubles width | 10.97 m | 36 ft |
| Doubles alley, each side | 1.37 m | 4.5 ft |
| Net to service line | 6.40 m | 21 ft |
| Net height at centre | 0.914 m | 3 ft |
| Net height at posts | 1.07 m | 3.5 ft |
How Long is a Tennis Court?
The standard tennis court length is 23.77 m (78 ft). This is the distance from one baseline to the other and remains unchanged whether the match is singles or doubles.
The baselines form the rear boundaries of the court. Players serve from behind these lines, and the centre mark on each baseline helps identify the correct position from which a player serves. Because the court length remains fixed, players competing at different venues are working with the same baseline-to-baseline distance.
So, when you need to know how long a tennis court is, the standard measurement is 23.77 metres or 78 feet.
How Wide is a Tennis Court?
The tennis court width depends on the format being played. Singles uses a narrower playing area, while doubles includes the additional space between the singles and doubles sidelines.
Singles Court Width
A singles court is 8.23 m (27 ft) wide. The two singles sidelines define the lateral boundaries used during singles play. Since players compete individually on each side of the net, the narrower width gives them a more compact playing area while maintaining the standard 23.77 m court length.
Doubles Court Width
A doubles court is 10.97 m (36 ft) wide. The extra width comes from the two doubles alleys located outside the singles sidelines. Each doubles alley measures 1.37 m (4.5 ft). Together, the two alleys add 2.74 m (9 ft) to the singles court width, taking the total width from 8.23 m to 10.97 m. The length does not change, so both singles and doubles courts remain 23.77 m (78 ft) long.
What are the Doubles Alleys?
The doubles alleys, often called tramlines, are the strips of court between the singles and doubles sidelines. They are not part of the singles playing area but become part of the court during doubles matches.
Each alley is 1.37 m (4.5 ft) wide. There is one alley on each side of the court, which accounts for the difference between the singles width of 8.23 m and the doubles width of 10.97 m.
This means that a standard tennis court does not need to be physically extended for doubles. The same court contains both playing areas, with the appropriate sidelines determining which width applies to the match.
Tennis Service Court Dimensions
The service area is the section of the court where a player’s serve must land to begin a point. On each side of the net, the service line is positioned 6.40 m (21 ft) from the net and runs parallel to it. The service area extends across the singles court width of 8.23 m. A centre service line divides it into two equal sections, creating the two service courts on each side.
Each service court therefore measures: 6.40 m × 4.115 m (21 ft × 13.5 ft)
The 6.40 m measurement represents the distance from the net to the service line, while 4.115 m represents half of the 8.23 m singles court width. The two service courts together therefore occupy the full singles width.
During a serve, the ball must land in the diagonally opposite service court. This is why the service lines and centre service line are essential parts of the court layout.
Tennis Court Lines and Their Measurements
The different lines on a tennis court divide the playing area into sections and determine which areas are used during singles, doubles and serving.
Baselines
The baselines are located at opposite ends of the court and form its rear boundaries. The distance between the two baselines is 23.77 m (78 ft).
A centre mark is placed at the midpoint of each baseline. It helps players identify their serving position when standing behind the baseline.
Singles Sidelines
The singles sidelines define the width of the court used during singles matches. The distance between the two singles sidelines is 8.23 m (27 ft).
Doubles Sidelines
The doubles sidelines mark the outer boundaries of the full court used in doubles matches. They are 10.97 m (36 ft) apart.
Doubles Alleys
The area between each singles sideline and the corresponding doubles sideline is the doubles alley. Each one measures 1.37 m (4.5 ft) wide.
Service Lines
There is one service line on each side of the net. Each service line is positioned 6.40 m (21 ft) from the net and runs parallel to it.
Centre Service Line
The centre service line divides the service area into two equal service courts. It runs perpendicular to the net and connects the service line to the net.
Tennis Net Dimensions
The net divides the court into two equal halves, but its height is not the same across its entire width. It is slightly lower at the centre than it is at the posts.
The official net measurements are:
- Net height at centre: 0.914 m (3 ft)
- Net height at posts: 1.07 m (3.5 ft)
A centre strap holds the net down at the required height. The difference between the centre and post heights creates the characteristic slight dip in the tennis net. For doubles courts, the centres of the net posts are positioned 0.914 m (3 ft) outside the doubles court on each side.
Tennis Court Dimensions: Singles vs Doubles
Although singles and doubles are played on the same overall court, the width used for each format is different. The important difference is the width. Singles uses the inner sidelines, while doubles uses the outer sidelines and includes both doubles alleys. The length and net measurements remain the same.
| Feature | Singles | Doubles |
| Length | 23.77 m (78 ft) | 23.77 m (78 ft) |
| Width | 8.23 m (27 ft) | 10.97 m (36 ft) |
| Doubles alleys | Not included | 1.37 m (4.5 ft) each |
| Net height at centre | 0.914 m (3 ft) | 0.914 m (3 ft) |
| Net height at posts | 1.07 m (3.5 ft) | 1.07 m (3.5 ft) |
How are Tennis Court Measurements Taken?
When a tennis court is measured, the position and width of the lines need to be considered. Standard court measurements are taken to the outside of the lines, which helps ensure that the playing area is marked consistently.
The lines themselves also have specified widths. Most court lines are between 2.5 cm and 5 cm (1–2 inches) wide, while the baselines can be up to 10 cm (4 inches) wide. The centre service line and centre mark are 5 cm (2 inches) wide.
These specifications are particularly important when constructing or remarking a court because changing the position or width of a line can affect the actual playing area.
Does the Size of a Tennis Court Vary?
The dimensions of a standard tennis playing court are fixed, so players can expect the same basic court size at different venues. However, the overall area required around the court can vary considerably.
A tennis facility needs additional space outside the playing lines for players to move safely, as well as fencing, seating, officials and other equipment. Competition venues may also have larger clearances around the court than recreational facilities.
Therefore, the playing court itself should not be confused with the total footprint of a tennis facility. The standard playing dimensions remain 23.77 m long, 8.23 m wide for singles, and 10.97 m wide for doubles.
Conclusion
The standard tennis court dimensions are designed to provide a consistent playing area for singles and doubles. The court is 23.77 m (78 ft) long, with a width of 8.23 m (27 ft) for singles and 10.97 m (36 ft) for doubles. The additional doubles width comes from the 1.37 m (4.5 ft) alley on each side.
The service lines are positioned 6.40 m (21 ft) from the net, creating service courts measuring 6.40 m × 4.115 m (21 ft × 13.5 ft). The net stands 0.914 m (3 ft) high at the centre and 1.07 m (3.5 ft) at the posts.
Once you understand these measurements, the layout of a tennis court becomes much easier to read. Every line has a purpose, and together these dimensions create the standard court used for tennis around the world.
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Frequently Asked Questions
A standard tennis court is 23.77 m (78 ft) long. It is 8.23 m (27 ft) wide for singles and 10.97 m (36 ft) wide for doubles.
A tennis court is 78 ft long, 27 ft wide for singles, and 36 ft wide for doubles. Each doubles alley is 4.5 ft wide.
The standard court is 23.77 m long. Its width is 8.23 m for singles and 10.97 m for doubles.
Each service court measures 6.40 m × 4.115 m, which is approximately 21 ft × 13.5 ft. The service line is 6.40 m (21 ft) from the net.
A tennis net is 0.914 m (3 ft) high at the centre and 1.07 m (3.5 ft) high at the posts.
A doubles tennis court is 10.97 m (36 ft) wide. Each doubles alley adds 1.37 m (4.5 ft) to either side of the singles court.
