Target Heart Rate Calculator (Karvonen)

Your training heart rate using the Karvonen heart-rate-reserve method.

Result

Target heart rate (bpm)

151

Max heart rate (bpm)

190

How it works

THR = rest + intensity × (220 − age − rest)

The Karvonen method bases your target on heart-rate reserve (max minus resting), giving a more personal zone than a flat percentage of max.

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Frequently asked questions

Why use resting heart rate?

It personalises the zone — two people the same age can have very different reserves.

What intensity should I pick?

50–70% for easy/fat-burning, 70–85% for endurance and tempo work.

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