Racket Grip Size Calculator
Measure your hand once, get your grip size in US inches and EU L numbers, and find out whether the handle you play with is making your elbow work overtime.
A handle that is clearly too small forces the wrist extensors, the same tendon group injured in tennis elbow, to squeeze harder on every off-centre hit. The fix costs a ruler and sometimes an overgrip. Measure from your palm's middle crease to the tip of your ring finger, enter it below, and compare against what you currently play with.
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Find your grip size
Hand flat, fingers together. Measure from the middle (proximal) crease of your palm to the tip of your ring finger.
Use whichever your ruler shows; the result is given in both systems
Typical adult range: 10–12 cm (4–4¾ in)
Padel handles come small by design; the result converts to overgrip count
Printed on the butt cap of most tennis rackets
Grip sizing reduces one risk factor. It does not treat an already irritated tendon; structured loading does.
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How to measure, two methods
Method 1: The ruler measurement
Open your dominant hand flat, fingers together and extended. Find the middle of the three creases crossing your palm (the proximal palmar crease) and measure from where it meets the line of your ring finger up to the ring fingertip. That length in inches is your grip size directly: 4¼ in means a 4¼ (L2) grip. This is the technique popularised by orthopedic surgeon Robert Nirschl, the clinician behind much of the modern tennis elbow literature.
Method 2: The index finger test
Hold your racket in an Eastern forehand grip (shake hands with the handle). Slide the index finger of your free hand into the gap between your fingertips and the base of your thumb. It should fit snugly. If there's room to spare, the grip is too big. If the finger doesn't fit at all, too small. Use this as a sanity check on the ruler number, especially if your measurement lands between sizes.
Grip size conversion chart
| US size (in) | EU size | Circumference (mm) | Hand measurement | Typical player |
|---|---|---|---|---|
| 4" | L0 | 100–103 | ≤ 10.2 cm / 4 in | Juniors, small hands |
| 4⅛" | L1 | 103–106 | 10.3–10.6 cm / 4⅛ in | Smaller adult hands |
| 4¼" | L2 | 106–110 | 10.7–10.9 cm / 4¼ in | Most women |
| 4⅜" | L3 | 110–113 | 11.0–11.2 cm / 4⅜ in | Most men, larger women's hands |
| 4½" | L4 | 113–118 | 11.3–11.6 cm / 4½ in | Larger men's hands |
| 4⅝" | L5 | 118–120 | 11.7–11.9 cm / 4⅝ in | Very large hands |
| 4¾" | L6 | 120+ | ≥ 12.0 cm / 4¾ in | Rare, special order |
One overgrip adds roughly 1/16 in (half a size). A replacement grip in a thicker gauge adds up to 1/8 in (a full size).
What grip size has to do with your elbow
The stabiliser problem
Every off-centre ball contact tries to twist the racket out of your hand. The muscles resisting that torsion are the wrist extensors, anchored at the lateral epicondyle, exactly where tennis elbow lives. A handle that is too thin gives your fingers less leverage against the twist, so the extensors compensate with raw squeeze force, hundreds of times per session. Kelley et al. (1994) measured this directly with EMG: players with lateral elbow pain showed markedly higher wrist extensor activation during strokes, and grip mechanics were a consistent contributor.
The honest caveat
Precision matters less than you'd think. Hatch et al. (2006) tested grips a quarter inch above and below each player's measured size and found no significant EMG difference across that narrow window. The practical reading: don't agonise over L2 vs L3. Do fix a grip that is clearly wrong, a full size or more off, or one you're compensating for by death-gripping the handle. The calculator above flags exactly that case.
Why "too big" is also a problem
An oversized handle blocks the fingers from wrapping fully, which reduces grip security a different way and limits forearm rotation on serves and topspin. It also can't be fixed: you can build a small handle up with overgrips, but you can't shave a big one down without replacing the pallets (tennis) or the racket. That asymmetry is why every stringer gives the same advice: when between sizes, take the smaller one.
Padel is a different game
Padel rackets ship with a deliberately thin handle (roughly the equivalent of a tennis L1) and players customise upward with overgrips, one to three is typical. Because padel involves more wrist action than tennis, players tend to run slightly smaller grips than their tennis size. Padel's rapid growth has also brought a wave of elbow injuries to players who never had them in tennis; our padel elbow report covers the numbers.
How to use this calculator
Ruler against your open dominant hand, middle palm crease to ring fingertip. Measure twice; a 3 mm error is half a grip size.
Type the measurement, pick your sport, and select the grip size printed on your current racket's butt cap if you know it. The tool shows your recommended size and the gap to what you play with now.
Half a size small: add one overgrip. Full size small: replacement grip in a thicker gauge plus an overgrip, or resize at a pro shop. Too large: that handle can't shrink; factor it into your next racket purchase.
If your elbow already hurts, a better grip stops adding insult but doesn't rebuild the tendon. The Tennis Elbow Oracle app runs the daily eccentric protocol on your phone, offline, with your symptoms steering the load.
FAQ
How do I measure my tennis grip size at home?
Open your dominant hand flat, fingers together. Measure from the middle (proximal) crease of your palm to the tip of your ring finger with a ruler. That length in inches is your grip size: 4¼ in equals L2, 4⅜ in equals L3, and so on. Cross-check with the index finger test described above.
Should I size up or down if I'm between grip sizes?
Size down and add an overgrip. One overgrip adds roughly 1/16 inch, half a size, and is reversible. A handle that's too large can't be reduced, while a smaller handle can always be built up in 1/16-inch steps.
Can the wrong grip size cause tennis elbow?
It's a contributing factor rather than a sole cause. A grip that's clearly too small forces the wrist extensors to work harder to stabilise the racket against twisting. Kelley et al. (1994) measured higher forearm activation with poor grip mechanics, while Hatch et al. (2006) found a quarter inch either way made little difference. Fix grips that are badly wrong; don't obsess over one step.
What about padel grip size?
Padel rackets ship with one nominally small handle and players build up with overgrips. The calculator converts the gap between your hand measurement and the bare handle into a recommended overgrip count, each adding about 1/16 inch.
Is my data sent anywhere?
No. The calculation runs entirely in your browser and values persist in localStorage on your device. Nothing is uploaded and no account is needed.
Sources: Nirschl RP, clinical grip-sizing technique; Kelley JD et al., Am J Sports Med 1994; Hatch GF et al., Am J Sports Med 2006; AAOS clinical guidance on lateral epicondylitis.
Related tools and guides
Right grip in hand. Now fix the tendon.
Tennis Elbow Oracle pairs equipment guidance with a daily calibrated eccentric program, 15 minutes a day, offline.
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