Heart Rate Zones
Free Heart Rate Zones calculator with clear step-by-step results.
About Heart Rate Zones
Heart rate zones are set as percentages of the difference between max and resting heart rate.
Formula
Formula
Zone = rest + HR reserve × fraction
Worked example
With the default values below, Heart Rate Zones returns Zone 2 Range of 138-151 bpm. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Max heart rateminimum 0 bpm
- 190 bpm
- Resting heart rateminimum 0 bpm
- 60 bpm
Results
- Zone 2 Range
- 138-151 bpm
- Zone 4 Range
- 171-184 bpm
- Heart Rate Reserve
- 130.00 bpm
Step by step
- 1Values used
- 2Formula
- 3Zone 2 Range= 138-151 bpm
- 4Zone 4 Range= 171-184 bpm
- 5Heart Rate Reserve= 130 bpm
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Estimates are general guidance — consult a healthcare professional for personal medical advice.
- This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Estimates are general guidance — consult a healthcare professional for personal medical advice.
Frequently Asked Questions
How does this calculator work?
Heart rate zones are set as percentages of the difference between max and resting heart rate.
Why does this matter?
Use measured max HR when possible.