How do I calculate my max heart rate?

A quick estimate is 220 minus your age, though it varies by person.

Is 220 minus age accurate?

It's a rough guide; actual max can be 10–12 beats higher or lower.

Should I exercise at my maximum heart rate?

No; most training happens well below it, in target zones.

What Is Your Maximum Heart Rate?

Published 9/17/2025 · 3 min read · Health calculators

Sofia Nunes — Health & wellness writer at OneKitly

Nutrition · Hydration

Checked against 2 sources

View profile →

In short

Your maximum heart rate is the highest your heart can beat during all-out effort, and a common estimate is 220 minus your age — so about 190 for a 30-year-old. It's a rough guide with wide individual variation; newer formulas like 208 − 0.7 × age fit many people better. Training zones are set as percentages of it.

A quick estimate is 220 minus your age, but it varies widely. Here's what max heart rate means, why it's only a guide, and how to use it for training.

What it is and the classic formula

Your maximum heart rate is simply the fastest your heart can beat when you push to complete exhaustion — the ceiling of your cardiovascular effort, in beats per minute. The best-known way to estimate it is the old rule of 220 minus your age: a 30-year-old lands near 190, a 50-year-old near 170. It's popular because it's easy to remember and needs nothing but your age, which is also its weakness.

Why it's only an estimate

The 220-minus-age rule is a population average, and real people scatter widely around it — an individual's true maximum can sit 10 to 12 beats higher or lower. It's largely set by genetics and age, not fitness, so a very fit person doesn't necessarily have a higher max. Because the classic formula drifts for older adults, researchers proposed better fits such as 208 − 0.7 × age. Any formula is a starting estimate, not a personal measurement.

How to find yours more accurately

The only way to know your real maximum is to measure it, and because that means a genuinely exhausting all-out effort, it's best done as a supervised test — on a treadmill in a lab, or a hard field test under professional guidance, especially if you're older or have any health concerns. Modern sports watches also estimate it over time from your hardest sessions, which is safer and, with enough data, reasonably close. Don't attempt a max test alone if you're unsure.

Using it for training zones

The main practical use of your max is to set training zones, each a band of intensity defined as a percentage of it. Easy aerobic work sits around 60–70%, steady endurance 70–80%, and hard threshold efforts 80–90%. Keeping most of your training in the lower zones — and only occasionally near the top — builds fitness while managing fatigue. You almost never train at your true maximum; it's the reference point the useful zones hang from.

Max heart rate calculatorFind your max heart rate and training zones.Try the tool →

Frequently asked questions

How do I calculate my max heart rate?: A quick estimate is 220 minus your age, though it varies by person.
Is 220 minus age accurate?: It's a rough guide; actual max can be 10–12 beats higher or lower.
Should I exercise at my maximum heart rate?: No; most training happens well below it, in target zones.

Articles you may find interesting

All guides →

ExplainerHeart Rate Zones Explained (and How to Find Yours)Heart rate zones split your effort into five bands, from easy to all-out. Here's what each does, how to estimate your zones, and how to train with them.ExplainerWhat Is VO2 Max?VO2 max is the most oxygen your body can use during hard exercise — a benchmark of aerobic fitness. Here's what it means, typical values, and how to raise it.ExplainerThe One-Mile Walk Test, and What a VO2max Estimate AssumesThe Rockport test turns a brisk one-mile walk into a VO2max number using five inputs and one published regression. Here is the equation, one person worked through it, and the two assumptions — a stated standard error and a genuinely brisk pace — that decide whether the answer means anything.How-toHow to Predict a Half Marathon Time from a 5K or 10KUse the Riegel formula to predict your half marathon time from a recent 5K or 10K, then turn that estimate into a realistic race-day pace with a smart pacing plan.ExplainerThe 10% Rule for Runners: Build Mileage Without InjuryThe 10% rule says to raise your weekly running mileage by no more than 10% at a time. Learn why it works, when to break it, and how to plan safe progression.ExplainerWhat Is Cycling FTP (Functional Threshold Power)?FTP is the highest power in watts you can hold for about an hour. Learn how to test it, why watts per kilogram matters, and how it guides training zones.

This is general wellness information, not medical advice. A maximal effort test carries risk; check with a doctor before pushing to your limit.

Sources

Spotted a mistake in this article?