Calculator Inputs and Outputs
Inputs
- Estimated or measured maximum heart rate (bpm) — example: 190
- Resting heart rate (bpm) — example: 60
- Exercise heart rate (bpm) — example: 140
Results
- Heart rate reserve (bpm)
- Exercise intensity using HRR (%)
Formula used
Heart rate reserve = maximum heart rate − resting heart rate; intensity = (exercise − resting) ÷ reserve × 100.
How to Use the Average Heart Rate Reserve Calculator
- Enter each requested input using consistent units.
- Select Calculate Average Heart Rate Reserve.
- Review the primary answer and supporting results.
Inputs
- Estimated or measured maximum heart rate: enter a value in bpm.
- Resting heart rate: enter a value in bpm.
- Exercise heart rate: enter a value in bpm.
Formula
Heart rate reserve = maximum heart rate − resting heart rate; intensity = (exercise − resting) ÷ reserve × 100.
Results
- Heart rate reserve in bpm.
- Exercise intensity using HRR in %.
Accuracy and Limits
Use measured inputs and keep units consistent. Results are estimates and should be independently checked before financial, medical, construction, scientific, legal, or safety-critical decisions.
Calculation Standards
This tool uses documented formulas and high-precision internal values. Displayed results may be rounded for readability. Review the assumptions and verify important decisions with a qualified professional.
Read our calculation methodology