Longevity calculator
Grip strength and longevity — what PURE actually found
Compare a handgrip reading with the population mean for your age and sex, then read the associations the PURE study published per 5 kg of grip. The page reports the study's numbers; it does not turn them into a personal risk. Free, instant, no sign-up.
This is here so the association below can be quoted once against a distance you can see. It is not an exponent. Raising a hazard ratio to the power of your personal shortfall invents a risk multiplier the study never estimated.
✓ Inside PURE's enrolment range (35–70)
What PURE found, per 5 kg lower grip
| Outcome | Hazard ratio | 95% CI |
|---|---|---|
| Death from any cause | 1.16 | 1.13–1.20 |
| Cardiovascular death | 1.17 | 1.11–1.24 |
| Non-cardiovascular death | 1.17 | 1.12–1.21 |
| Myocardial infarction | 1.07 | 1.02–1.11 |
| Stroke | 1.09 | 1.05–1.15 |
Each row is a cohort-level rate ratio over one follow-up window, for each 5 kg lower grip. It is not a probability and it is not your probability.
Outcomes the same study found no association with
- New diagnosis of diabetes
- Hospital admission for pneumonia or COPD
- Injury from a fall
- Fracture
These ship alongside the positive findings, because a page that lists only the hits is describing a different paper.
A weak reading is a reason to look at overall training and health, not a reason to buy a hand gripper. The coach can tell the difference.
The finding, stated plainly
Leong and colleagues (The Lancet, 2015) measured handgrip with a Jamar dynamometer in 139,691 people across 17 countries and followed them for a median of four years, during which 3,379 people — about 2 percent — died. Each 5 kg lower grip was associated with a 16 percent higher rate of death from any cause. In that cohort grip strength was a stronger predictor of all-cause and cardiovascular death than systolic blood pressure. That is a genuinely striking result from a measurement that takes five seconds, which is why it gets repeated, and why it gets overstated.
Why this page will not give you a risk number
A hazard ratio is a ratio of event rates between groups in one cohort over one follow-up window. It does not compound. Taking 1.16, raising it to the power of your personal shortfall in five-kilogram steps, and printing the result gives a number the study never estimated, extrapolates a term far outside the range it was fitted over, and attaches a cohort average to one individual where it does not belong — and the published confidence interval does not cover any of it. So this page shows your gap and the study's ratios as separate things, and never multiplies them together. Several calculators do multiply them.
Grip is a proxy, and squeezing is not the mechanism
Grip strength stands in for whole-body muscle mass, for nutrition, for undiagnosed illness and for frailty, all at once. The authors close the paper by noting that whether improving grip strength reduces mortality has not been tested. That distinction survives everything else on this page: a low reading is a reason to look at overall health and overall training, and it is not evidence that a hand gripper changes anything about the outcomes in the table.
Two studies stacked, not one continuous finding
The reference means come from Massy-Westropp and colleagues (BMC Research Notes, 2011), an Australian population sample of 1,366 men and 1,312 women, reported as right-hand values without stratifying by which hand the participant favoured. The hazard ratios come from PURE. They are two separate claims placed side by side because that is the most useful arrangement, not one measurement that runs from your reading to an outcome. PURE's associations were similar across country-income strata for every outcome except cancer and respiratory admission — and in high-income countries the cancer association ran the other way.
Getting a reading worth comparing
Use the same dynamometer and the same grip-span setting every time. Switching devices changes the number more than months of training do, and a reading taken on a different device is not comparable to the one you took last year, let alone to a population mean. Sit with the elbow bent to roughly 90 degrees and tucked in, squeeze hard for three seconds without swinging or leaning, take three attempts per hand with a short rest, and record the best.