How high over the net should you hit in tennis
Draw your margin. Aim at the window, not the line.
Move the idea yourself.
One instrument from The Program, free here. Drag it and watch the numbers change: models are labelled as models.
Launch window · calculated model
This sets the strength of downward lift. It is not an RPM scale. Speed stays at 25 m/s, launch at 12° and height at 1 m.
Dashed: zero lift. Lime: selected lift. Net at 11.89 m; far baseline at 23.77 m. Vertical scale expanded.
18.7 m
landing at the fixed 12° launch
0.71 m
clearance below the ball at the net
8.52–18.31° launch angles land in · width 9.79°.
Zero-lift width: 6.87°. Each interval varies the launch angle while keeping the other inputs fixed.
Calculation assumptions
57 g ball; 33 mm radius; air density 1.21 kg/m³; gravity 9.81 m/s²; fixed drag coefficient 0.507 and selected lift coefficient. Still air, no spin decay or bounce. Angles sampled every 0.01° from 0–30°. This model does not measure a player’s spin or accuracy.
Key facts
- 1m
The interactive example launches from a ball-centre height of 1 m at 25 m/s and 12°. It assumes still air and fixed aerodynamic coefficients.
- 22.9m
At zero lift, it lands 22.9 m from contact and clears the net by 1.23 m below the ball. With lift coefficient 0.20, those values are 18.7 m and 0.71 m.
- 6.02–12.89°
Varying launch angle instead gives successful intervals of 6.02–12.89° at zero lift and 8.52–18.31° at coefficient 0.20. These are calculated intervals, not measured player accuracy.
Why it works
Gravity pulls down; drag opposes motion through the air; Magnus force acts perpendicular to that motion and the spin axis.
In this example, added downward lift at the same launch lowers clearance and shortens the flight. To use that dip for a higher net target, adjust the launch angle too.
On court, start with a generous area and count what happens. Change one task constraint at a time so you can tell whether the result becomes more repeatable.
The line to say on court“Choose clearance and landing together.”
Drill: The slot
15 min · alone or with a partner- Choose two visible height references above the net and a broad landing area within the singles court. Keep the reference heights fixed; these are practice choices.
- Take ten similar feeds or drop feeds. Score one only if the ball passes between the references and its first bounce lands in the area. Net, low, high, long and wide attempts stay in the ten.
- Repeat under the same conditions, then try a separate ten-attempt rally block with a partner. Keep fed and live results separate.
More drills like this: practise alone
Faults and fixes
Questions players ask
How high should I hit over the net?
Use a target that gives you repeatable clearance and landing for the shot you are trying. Adjust it with the task and your results.
Does more topspin automatically clear the net higher?
No. In the fixed-launch example, added downward lift lowers the path. A higher launch can use the extra dip to recover clearance.
Can I use these intervals for my serve?
No. The displayed calculation is a baseline groundstroke example, not a serve model.
What this doesn't cover
The numerical implementation has been independently checked; physical calibration remains open. The calculation uses a 57 g ball, 33 mm radius, drag coefficient 0.507 and no spin decay or bounce. It does not map lift to RPM or predict a player’s success rate.