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Aerobic Threshold Heart Rate Estimate from Max HR Calculator

Low-intensity training boundary — fat-burning zone.

Estimates the aerobic (AeT) threshold HR ≈ 0.65–0.75 × HRmax, and the anaerobic threshold (AnT) HR ≈ 0.82–0.90 × HRmax. Used in zone 2 training plans.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

bpm

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

AeT ≈ 0.70·HRmax; AnT ≈ 0.85·HRmax

In depth

Estimates the aerobic (AeT) threshold HR ≈ 0.65–0.75 × HRmax, and the anaerobic threshold (AnT) HR ≈ 0.82–0.90 × HRmax. Used in zone 2 training plans.