Heart Rate Zone Calculator — Training Zones from HR
Calculate heart rate training zones from max HR, LTHR or using the Karvonen method.
How We Calculate This
Heart Rate Zone Methods
% of Max HR: Each zone is a percentage range of your maximum heart rate. Simple but less personalised.
LTHR-based: Zones are set relative to your lactate threshold heart rate. Uses the Coggan/Friel 7-zone model, most popular with serious cyclists.
Karvonen: Target HR = Resting HR + (Heart Rate Reserve x intensity%). More personalised as it accounts for resting heart rate.
Frequently Asked Questions
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Last updated: 2025-02-20
All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.