Health & Fitness
Karvonen Heart Rate Zone Calculator
Build five training zones from heart rate reserve using the Karvonen method.
Preparing your result…
What this calculator does
Calculates Karvonen Heart Rate Zone Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Target HR = resting HR + intensity × (max HR − resting HR)
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Karvonen target HR=resting HR+f×(maximum HR−resting HR), with intensity fraction f (e.g.0.60). Heart-rate reserve=maximum−resting HR.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Use the supplied maximum and resting HR in beats/min. State each zone percentage explicitly; percent HR reserve is different from percent maximum HR. Require maximum>resting and 0≤f≤1. Population-specific training prescription needs context.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Maximum heart rate (bpm) | Resting heart rate (bpm) | Heart rate reserve |
|---|---|---|---|
| Worked example | 190 | 58 | 132 bpm |
| Half the amounts | 120 | 35 | 85 bpm |
| Double the amounts | 220 | 100 | 120 bpm |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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