A free grip strength checker from Catalyst Performance, a longevity-focused personal training studio in the Singapore CBD. Enter your handgrip reading in kilograms and it returns your percentile for your age and sex, plus whether you sit above or below the AWGS sarcopenia thresholds. Grip strength is one of the strongest single predictors of all-cause mortality, which is why the number is worth knowing rather than guessing. The calculator runs entirely in your browser as deterministic maths against published norm tables. There is no account, no email capture and no server call, so nothing you enter is stored. Every threshold traces back to a primary source, and the sources are listed on the page. It is one of eleven free calculators in the suite, alongside fitness age, VO2 max percentile, waist-to-height ratio, the sitting-rising test, GLP-1 muscle loss, fat loss, running pace, heart rate zones, protein intake and body fat percentage. All eleven are free to embed on any other website.