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Target Heart Rate Calculator – Calculates ideal heart rate zones for exercise ...

The Target Heart Rate Calculator calculates ideal heart rate zones for exercise based on age. This Target Heart Rate Calculator uses an established clinical or fitness formula to give you a personalised estimate in seconds. Results are for educational reference — for specific health decisions, discuss with your doctor.

The formula behind this calculator: Estimates max heart rate as 220 minus age, then applies percentage zones for moderate (50-70%) and vigorous (70-85%) activity. As a practical example: A 40-year-old has an estimated max heart rate of 180, with a moderate zone of about 90-126 bpm. All results are calculated instantly in your browser — no data is stored or transmitted.

Target Heart Rate Calculator FAQ

What does the Target Heart Rate Calculator calculate?

Calculates ideal heart rate zones for exercise based on age.

Why might my doctor's calculation differ?

Clinical assessments use additional factors, validated instruments, and professional judgement not captured in a general-purpose calculator.

Should I use metric or imperial units?

Either — the calculator accepts both. Metric values (kg, cm) tend to have simpler conversion paths in the underlying formulas.

Does this work on mobile?

Yes — fully responsive and optimised for smartphones, tablets, and desktop browsers.