Purpose and context
What does the Target Heart Rate Calculator do?
A target range provides intensity context rather than one perfect pulse. The method and percentage band must be visible to interpret the BPM result.
Who it supports: Healthy adults; HRR mode requires resting heart rate.
Transparent calculation
Formula and calculation method
Estimated HRmax comes from 208 − 0.7 × age. Lower and upper intensity percentages create the displayed BPM range.
Worked calculation example
At estimated HRmax 180 bpm, 60–75% by the HRmax method gives 108–135 bpm.
The live calculator retains greater internal precision and rounds only when presenting the result.
How to use the Target Heart Rate Calculator
- Enter adult age and select a method.
- Enter resting heart rate for HRR.
- Choose lower and upper intensity percentages.
- Calculate the estimated BPM range.
Understanding your result
The result card identifies the value, unit, method, supporting values and an accuracy notice. Estimated and predicted outputs are labelled so that apparent precision is not mistaken for certainty.
Continue with the Heart Rate Zone Calculator for a related measurement using its own documented method.
Accuracy, assumptions and limitations
An age-based target may be inappropriate with symptoms, cardiovascular disease or medications affecting pulse.
Common input and interpretation mistakes
- Setting the upper percentage below the lower one.
- Using an unrepresentative resting pulse.
- Treating the estimate as a clinical exercise prescription.
Primary method source: https://pubmed.ncbi.nlm.nih.gov/11153730/.
Frequently asked questions about Target Heart Rate Calculator
Exercise intensity is normally managed across a band and heart rate naturally fluctuates.
It is the arithmetic midpoint of the calculated lower and upper BPM boundaries.
The heart-rate-reserve or Karvonen method.
This implementation uses the Tanaka age prediction; a measured value requires an appropriately supervised protocol.
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