Is Heart Rate Zone Calculator free to use?

Yes, Heart Rate Zone Calculator is completely free. No account, no sign-up, and no hidden fees required.

Does Heart Rate Zone Calculator work offline?

Heart Rate Zone Calculator runs entirely in your browser. Once the page is loaded, most features work without an internet connection.

Your data never leaves your device. All processing happens locally in your browser — nothing is uploaded to any server.

Health Tools

Calculate your max heart rate and 5 training zones by age — fat burn, cardio, and peak zones with target BPM ranges

1만 명 이상의 개발자가 사용

Age (years)

Resting HR (bpm)optional

Calculation Method

Simple: zones as % of max HR (220 − age)

Estimated Max Heart Rate

190 bpm

Zone 1 — Warm Up

Very light effort. Warm-up and recovery.

95–114

50–60%

Zone 2 — Fat Burn

Light effort. Builds aerobic base, burns fat.

114–133

60–70%

Zone 3 — Aerobic

Moderate effort. Improves cardiovascular fitness.

133–152

70–80%

Zone 4 — Anaerobic

Hard effort. Increases speed and power.

152–171

80–90%

Zone 5 — Maximum / Peak

Maximum effort. Short bursts only.

171–190

90–100%

Based on the 220 − age formula. Individual max HR can vary by ±10–20 bpm. Consult a physician before starting a new training program.