Tennis String Tension Calculator
Find your ideal tennis racket string tension based on playing style, string type, and court surface.
Improve control, power, and feel.
String tension is one of the most important — and most misunderstood — aspects of tennis racket setup. It affects power, control, spin potential, and arm comfort. Getting it right for your playing style and level can meaningfully improve your game.
The Basic Rule
- Lower tension → More power (strings deflect more, creating a trampoline effect), more arm comfort, less control
- Higher tension → More control (strings deflect less, ball leaves strings faster), less power, more precise placement
This seems counterintuitive — many players assume high tension = more power — but the trampoline physics is clear: a tight string bed gives less dwell time to the ball, less energy return, less power.
Recommended Tension Ranges
| String Type | Beginner | Intermediate | Advanced |
|---|---|---|---|
| Nylon (syn gut) | 50–55 lb / 23–25 kg | 52–58 lb / 24–26 kg | 55–60 lb / 25–27 kg |
| Polyester (co-poly) | 45–50 lb / 20–23 kg | 47–53 lb / 21–24 kg | 50–57 lb / 23–26 kg |
| Natural gut | 52–58 lb / 24–26 kg | 55–62 lb / 25–28 kg | 58–65 lb / 26–30 kg |
| Multifilament | 50–58 lb / 23–26 kg | 53–60 lb / 24–27 kg | 55–62 lb / 25–28 kg |
Court Surface Adjustments
- Hard court: Use mid-range tension for the recommended range
- Clay court: Consider 1–2 lb lower (clay is slower — lower tension restores some power)
- Grass court: Consider 1–2 lb higher (grass is faster — higher tension improves control)
Playing Style Adjustments
- Baseline power hitter: Lower end of range for extra pace
- All-court player: Middle of range
- Serve-and-volley / control player: Higher end for precision
Humidity and Temperature
String tension drops about 5–10% within 24 hours of stringing, then stabilises. Cold weather reduces tension further — if playing in cold conditions, string 2–3 lb tighter. Polyester strings lose tension faster than natural gut.
Recommended Starting Point
If unsure, start at the manufacturer’s recommended mid-tension (printed on the racket throat or handle). Note how it feels for 2–3 hours of play, then adjust by 2 lb in either direction.
String Gauge
Thinner gauge strings (16L, 17, 18) generate more spin and feel but break sooner. Thicker gauges (15L, 16) last longer. Most recreational players use 16 or 16L gauge.