Padel Ball vs Tennis Ball: Size, Pressure, Bounce and Price Compared (2026)

Quick Answer: A padel ball and a tennis ball weigh the same (56.0 to 59.4 g in both rulebooks) and look alike, but the padel ball is slightly smaller (6.35 to 6.77 cm against 6.54 to 6.86 cm) and runs lower internal pressure: the International Padel Federation’s limit works out to about 10.1 to 11.5 psi, while Tennis Warehouse says most tennis balls sit at 12 to 14 psi. That extra pressure makes a tennis ball play quicker and higher on a padel court, so use padel balls for padel. In the US a can of padel balls costs $4.95 to $7.99, against $4.49 to $5.99 for tennis balls.

From across the court, a padel ball and a tennis ball are the same yellow felt sphere. They even come in the same three-ball cans. The differences sit in two rulebooks: the International Padel Federation (FIP) specification for padel balls and the ITF Rules of Tennis. We put the two side by side, line by line, and added what each ball costs at US retailers in November 2026. This is a research comparison built on the federations’ published specs and retailer listings; we didn’t run our own ball tests.

By the numbers

• 2 cm: the gap between the top of the padel bounce window (135 to 145 cm) and the top of the standard tennis bounce window (135 to 147 cm). Both balls are dropped from the same 2.54 m (100 in) height onto a hard surface (FIP specification; ITF Rules of Tennis 2026, Appendix I).
• 10.1 to 11.5 psi: the FIP’s internal pressure limit for a padel ball, converted from its 4.6 to 5.2 kg per square inch. Tennis Warehouse’s ball guide puts most tennis balls at 12 to 14 psi; the ITF itself sets no pressure figure for pressurized balls.
• 1.4 mm: how much smaller a padel ball is at the midpoint of each legal size range (6.56 cm against 6.70 cm).
• Identical: weight (56.0 to 59.4 g), forward deformation (0.56 to 0.74 cm), return deformation (0.80 to 1.08 cm) and the nine-match durability limits. The FIP copied these lines from the ITF’s medium-pace ball.
• $3.54 vs $5.42: cost per can in the cheapest 24-can case of each we found on November 5, 2026: Penn Championship tennis balls ($84.95 at Tennis Warehouse) against Dunlop Pro Padel ($129.99 at Dunlop’s US store).
• Most of 10: in a 2023 lab test commissioned by the Swedish testing company Testfakta at the Instituto de Biomecánica de Valencia, an FIP-accredited lab, most of the ten padel balls tested missed at least one official requirement, and bounce and speed varied widely between brands.

Padel ball vs tennis ball: the rulebooks side by side

The padel column comes from the FIP’s “Certifications: Approved Balls” document, which reprints the ball articles of the Rules of Padel and the technical specification table. The tennis column comes from Appendix I of the ITF Rules of Tennis 2026. Read together, the FIP’s table is the ITF’s medium-pace table with a smaller diameter, a bounce ceiling 2 cm lower and a pressure line added.

Size: the padel ball is 1 to 2 mm smaller

The FIP allows a padel ball diameter of 6.35 to 6.77 cm. The ITF requires 6.54 to 6.86 cm for its Type 1 (fast) and Type 2 (medium) tennis balls, the ones sold in standard cans. The smallest legal padel ball is 1.9 mm smaller than the smallest legal tennis ball, and the largest legal padel ball is 0.9 mm smaller than the largest legal tennis ball.

The two ranges overlap between 6.54 and 6.77 cm, so you can’t always tell the balls apart by eye or in your hand. The ITF’s slow Type 3 ball, made for fast courts such as grass, is the outlier at 7.00 to 7.30 cm and clearly bigger than any padel ball.

Pressure: the spec that actually separates them

Pressure is the only line in the padel rules with no tennis equivalent. The FIP text says the ball “must have an internal pressure of between 4.6 kg and 5.2 kg per 2.54 square centimetres.” That unit only makes sense as per square inch, since 2.54 cm is one inch. Read that way, the padel limit is about 10.1 to 11.5 psi (roughly 70 to 79 kPa).

The ITF doesn’t set a pressure figure for pressurized tennis balls. It specifies the result instead: bounce and deformation. Tennis Warehouse’s guide to tennis balls fills the gap, saying “most tennis balls are between 12 and 14 PSI” and citing one manufacturer whose target spec was 15 psi. That puts a typical fresh tennis ball 0.5 to 4 psi above the padel limit.

These are gauge figures, meaning pressure above the surrounding air. If you see a tennis ball quoted at 25 to 27 psi elsewhere, that is absolute pressure, which adds the roughly 14.7 psi of sea-level air. It’s the same ball described a different way.

Bounce: the drop tests barely differ

Both rulebooks drop the ball from 2.54 m onto a hard surface. A legal padel ball must rebound 135 to 145 cm; a legal medium tennis ball 135 to 147 cm, and a fast Type 1 tennis ball 138 to 151 cm. On the drop test alone, a standard tennis ball can bounce at most 2 cm higher than a padel ball, and a fast tennis ball up to 6 cm higher.

That small gap is why the pressure line matters. The drop test is a slow, low-energy check; it says little about how a ball behaves off a hard smash into the back glass. The FIP’s lower pressure window is the lever that keeps padel balls tamer than tennis balls in play.

Brand matters as much as category, too. In Testfakta’s 2023 lab test of ten padel balls at the Instituto de Biomecánica de Valencia, the lab found “significant variance between the different brands,” with some balls very fast, others slow and some bouncing “considerably higher than others,” even though the makers declared similar specs. The lab simulated play with 666 strokes per ball, and most of the balls missed at least one official requirement. Our best padel balls ranking sorts the current FIP-approved balls by speed and conditions.

Weight, feel and durability: copied from tennis

Weight, forward deformation and return deformation are identical in both rulebooks. So are the durability limits: after a lab procedure that simulates nine matches, neither a padel nor a tennis ball may lose more than 0.4 g or 4.0 cm of bounce, and deformation may change by at most 0.08 cm forward and 0.10 cm on return.

The pressureless rules match word for word in substance. Both federations cap a pressureless ball at 7 kPa of internal pressure and require 60 days of acclimatisation at the altitude of a tournament. The construction differs: the FIP says approved pressureless padel balls are filled with “a microcellular material” that simulates internal pressure, while Tennis Warehouse describes pressureless tennis balls as having thicker core walls, which makes them heavier, harder and less arm-friendly.

Altitude: the padel ball that exists only on paper

Both sports define a slower ball for high courts. The ITF’s high-altitude tennis ball must bounce 122 to 135 cm and is meant for courts above 1,219 m (4,000 ft). The FIP’s version bounces 121.92 to 135 cm, which is exactly 48 to 53 inches, and the technical table names the same 1,219 m threshold. The rules extract in the same FIP document says another ball type may be used above 800 m, so the federation gives two different altitude figures.

The bigger catch is supply. The FIP states that “all approved balls are STANDARD balls,” so its list of 45 approved models contains no high-altitude padel ball. Tennis players in Denver or Salt Lake City can buy high-altitude cans from Penn, Wilson and Dunlop; Tennis Warehouse lists seven high-altitude tennis ball cases. Padel players at altitude play standard balls and pick by conditions instead: Wilson’s product copy recommends its standard Premier Padel ball, not the Premier Padel Speed, for altitude over 600 m (see our Wilson Premier padel balls guide).

What a can costs: padel vs tennis in the US

Prices from Tennis Warehouse on November 5, 2026, plus the padel boxes and cases that Tennis Warehouse doesn’t stock:

The median single can of padel balls at Tennis Warehouse cost $6.99, against $5.24 for tennis balls, about a third more. The gap is wider in bulk: the cheapest padel case per can, Dunlop Pro Padel at $5.42, still costs more than a single can of Penn Championship tennis balls at $4.99. Tecnifibre’s $4.95 Padel Team and $5.95 X-One are the cheapest padel cans at Tennis Warehouse, but neither appears on the FIP’s approved list; the Tecnifibre ball on that list is the Padel Tour. HEAD’s current Pro+ and Pro S+ replaced the Padel Pro and Pro S, which are the HEAD names on the FIP list.

If you’re buying padel balls by the case, our guides to Dunlop Pro padel balls, HEAD padel balls and Babolat padel balls cover the per-can math in more detail.

Can you use tennis balls for padel?

For a casual knock with friends when nobody brought padel balls, yes. For a real game, no:

• It isn’t legal in sanctioned play. The FIP requires balls from its approved list in official competition, and no tennis ball is on it.
• It carries more pressure. A fresh tennis ball is typically pressurized above padel’s 11.5 psi ceiling, so expect a livelier ball, especially off the back glass where padel points are built.
• A dead tennis ball isn’t a padel ball either. A tennis ball that has lost pressure bounces lower, but it is still a tennis-sized ball with a tennis felt, and its bounce keeps dropping.
• Green-dot balls aren’t a shortcut. The ITF’s Stage 1 (green) ball bounces 120 to 135 cm, close to padel’s high-altitude range, but it weighs 47.0 to 51.5 g, well under padel’s 56.0 g minimum.

Can you use padel balls for tennis?

You can rally with them, and a spare can of padel balls works for kids or a slow warm-up. They aren’t ITF approved, so they don’t belong in sanctioned tennis. A padel ball is slightly smaller and runs lower pressure, so it plays a touch slower than a fresh tennis ball. With padel cans costing about a third more, it rarely makes sense to buy padel balls for tennis on purpose.

Which ball should you buy?

Quick ways to tell them apart

• Read the can. Padel cans say “padel,” and FIP-approved balls state that approval on the can or the product page; tennis cans name the ball type, such as extra duty or regular duty.
• Check the approved lists. The FIP publishes its approved padel balls on padelfip.com; the ITF publishes approved tennis balls on itftennis.com.
• Look at the colour. Standard tennis balls must be white or yellow under the ITF rules. Padel’s rules also allow any other colour that contrasts with the court surface.

The bottom line

A padel ball is a tennis ball with a 1 to 2 mm smaller size and a pressure cap. The FIP keeps the tennis weight, deformation and durability limits, trims the size range to 6.35 to 6.77 cm, lowers the bounce ceiling by 2 cm and limits internal pressure to about 10.1 to 11.5 psi, below the 12 to 14 psi that Tennis Warehouse says is typical for tennis balls. Use padel balls for padel and tennis balls for tennis; the swap works for a casual hit but not for a real game. Expect to pay about a third more per can for padel balls in the US. For the best current padel balls, see our best padel balls ranking, and for the rest of the kit differences, our padel vs tennis, padel racket vs tennis racket and padel shoes vs tennis shoes comparisons.

Sources, checked November 5, 2026: International Padel Federation “FIP Certifications: Approved Balls” document (Rules of Padel ball articles, technical specification table, durability limits, approved-ball list of 45 models); ITF Rules of Tennis 2026, Appendix I (ball types, Stage 1 to 3 balls, durability); Tennis Warehouse “How to Choose the Right Tennis Balls” guide (pressure, felt and pressureless construction) and padel and tennis ball listings; Dunlop Sports US (Pro Padel case); PadelUSA product listings; Testfakta press release “Lab Test Reveals the Best Padel Balls” (August 24, 2023).