Health & Fitness
Percentage-Based Heart-Rate Targets
Estimate aerobic and anaerobic threshold heart rates and the zone between them.
Preparing your result…
What this calculator does
Calculates Aerobic vs Anaerobic Threshold 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
Lower target = max HR × your aerobic %; upper target = max HR × your anaerobic % (assumed percentages, not measured thresholds)
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
- • User-defined targets: HR1=maximum HR×aerobic fraction; HR2=maximum HR×anaerobic fraction. Fixed 0.80 and 0.90 fractions are assumptions, not measurements of individual metabolic thresholds.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Rename results percentage-based HR targets. Neither source validates universal 80%/90% AeT/AnT. To claim actual thresholds, specify a validated ventilatory/lactate testing method and required observations. Make selected fractions visible and distinguish reserve-based targets.
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 (measured if possible) (bpm) | Lower target (% of max) (%) | Upper target (% of max) (%) | Lower HR target |
|---|---|---|---|---|
| Worked example | 185 | 80% | 90% | 148 bpm |
| Half the amounts | 120 | 40% | 45% | 48 bpm |
| Double the amounts | 220 | 100% | 100% | 220 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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