We built a free, no-signup HRV by age calculator: enter your age and your average overnight HRV, and it shows the typical range for your age group right in your browser. It's a quick gut-check — but the more useful story is what the number means once you stop comparing yourself to a chart and start watching your own baseline.
The tool is linked below under "See also" — open it, type your age and your HRV in milliseconds (the rMSSD figure smart rings and the Oura app report), and you'll get the typical band for your age plus a plain-English read of where you land. Nothing is uploaded; it all runs locally in your browser.
As rough population context, typical overnight HRV runs around 55–105 ms under 25, 45–95 ms at 25–34, 35–75 ms at 35–44, 30–65 ms at 45–54, 25–55 ms at 55–64, and 20–45 ms at 65 and over. These bands are wide on purpose — HRV varies enormously between people of the same age, so treat them as context, not a grade.
Heart-rate variability tends to decline gradually as you get older, which is exactly why comparing your number to a younger friend's is misleading. A "good" HRV at 25 looks different at 55. The fair comparison is you against yourself: regular easy aerobic exercise, consistent sleep and less alcohol near bedtime are the levers that reliably lift your own baseline over time.
A single reading against a population range can't tell you much — one night swings with sleep, stress, late meals and plain randomness. The signal lives in the trend, and that's hard to eyeball from a daily app score. Vitra learns your personal HRV baseline from months of your own data, shows where today sits against it, and lets you tag what might be moving it — a late workout, a couple of drinks, a short night — so you can see what genuinely lifts or suppresses your HRV, all computed locally on your Mac or PC with nothing sent to the cloud.
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