Reading grip strength as a share of body weight
A dynamometer reading on its own rewards size: 90 lb of grip means something different at 130 lb of body weight than at 220 lb. Relative grip strength removes that by dividing grip by body weight. This calculator takes your body weight and both hand readings, averages the two hands, reports the ratio as a percentage, and shows which hand is stronger and by how much relative to the stronger side.
The optional target field is there because this page deliberately carries no reference table. If a protocol or a clinic has given you a target ratio, enter it and the calculator reports how many pounds the two-hand average still needs. Measurements are compared at the same single decimal place shown on screen, so the number and the conclusion never point in different directions. Figures and method current as of October 2026.
Grip readings depend on the device, the handle setting, elbow position and how many attempts you take, and this page corrects for none of that. Compare readings taken the same way on the same device. It does not grade you, estimate overall strength or make any health judgement. A sudden drop in grip, wrist or hand pain, or numbness are reasons to see a clinician rather than to retest.
FAQ
A raw dynamometer reading favours heavier people. Dividing by body weight gives a ratio that can be compared across body sizes, and it is the form several national fitness batteries report.
The widely circulated grip tables either come from a single source or disagree with each other, so putting a grade on your number would be inventing a standard. Enter a target from the table you trust instead.
This page reports the gap as a number only and sets no normal range, because no verified standard was available. A stronger dominant hand is common. See a clinician for pain or a sudden drop.