Put a padel ball and a tennis ball side by side and most people can't tell them apart. Same yellow felt, same round shape, same approximate size. But they're designed for different courts, different rackets, and different physics — and using the wrong one will noticeably change how the game plays.
The Key Difference: Internal Pressure
A tennis ball is pressurised to approximately 8 PSI (pounds per square inch) at sea level, designed to bounce off a 23m tennis court to a specific height and pace. A padel ball is pressurised lower — typically around 4.6–5.5 PSI — because the smaller 20m court and enclosed walls would make a full-pressure tennis ball bounce too high, travel too fast, and feel uncontrollable.
The lower pressure makes padel balls slightly squishier when squeezed, and they bounce lower and more predictably off the glass walls.
Size
Padel balls are marginally smaller than tennis balls:
- Tennis ball diameter: 6.54–6.86cm
- Padel ball diameter: 6.35–6.77cm
The difference is small but deliberate — padel's stringless racket face requires a slightly smaller ball to interact correctly with the surface during impact.
Felt
Both use felt — but padel balls typically have slightly thinner or different-density felt designed for the harder, consistent surface of padel court materials (artificial grass, resin, or concrete), rather than the variable conditions of outdoor tennis courts.
What Happens If You Use Tennis Balls in Padel?
It will work — nothing will break — but:
- The ball will bounce higher than intended off the court floor
- It will come off the glass walls faster and with less predictable arc
- Rallies will feel faster and harder to control than they should
- Wall play — central to the game — becomes harder to learn correctly
For casual first sessions it won't ruin the experience. For regular play and for developing wall-reading skills, using proper padel balls is worth it.
How Long Do Padel Balls Last?
Padel balls lose pressure gradually as you play. Most players notice a significant difference after 3–5 hours of use — the ball starts to feel slower and less lively. Competitive players often open a new can each session. Recreational players typically stretch a can over 2–3 sessions.
You can test pressure by dropping a ball from shoulder height. On most surfaces, a fresh padel ball should bounce back to between 65–85cm. If it's bouncing noticeably lower, the pressure has dropped and it's time for a new can.
Which Brand?
Head, Babolat, Dunlop, and Wilson all make padel-specific balls. Most courts in India stock one of these. For buying your own, any of the four major brands in a padel-specific tube (not tennis balls repackaged) will serve you correctly. Check that the can specifically says "padel" — not "tennis" and not "all-court."