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Home›Fitness & Cardio›Target Heart Rate Calculator
Fitness & Cardio · Evidence-aware tool

Target Heart Rate Calculator

Calculate a target heart-rate range using percent of max HR or heart-rate reserve/Karvonen mode.

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Enter or adjust the values above, then calculate.

    Target Heart Rate: %MaxHR & Karvonen HRR

    Calculate a target heart-rate range using percent of max HR or heart-rate reserve/Karvonen mode.

    Inputs this tool uses

    • Age
    • Resting heart rate
    • Method
    • Lower intensity
    • Upper intensity

    What you get

    Estimated target-heart-rate range.

    Estimated max HR185 bpm
    Target range137–155 bpm
    MethodHeart-rate reserve (Karvonen)

    How to use the Target Heart Rate Calculator

    1. Enter age, resting heart rate, method and the other fields relevant to this calculation.
    2. Select any method, activity level or option shown on this page, then choose Calculate.
    3. Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.

    How this calculation works

    Heart-rate tools use transparent age-predicted maximum-heart-rate equations and, where selected, heart-rate reserve (Karvonen) arithmetic.

    Method transparency: Results are calculated from the values you enter. Health estimates are educational reference values, not diagnoses or treatment advice.

    Example calculation

    The sample values loaded into the calculator produce 137–155 bpm. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.

    Assumptions and limitations

    • Energy, fitness and heart-rate outputs are estimates and vary by individual and device.
    • Stop exercise and seek appropriate care if you have concerning symptoms; this tool does not provide medical clearance.

    Sources and review status

    Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.

    Target Heart Rates ChartAmerican Heart Association · current · verified 2026-09-25General target-heart-rate guidance

    Questions people ask about Target Heart Rate Calculator

    What is the difference between %MaxHR and Karvonen HRR?

    %MaxHR applies an intensity percentage to estimated maximum heart rate. Heart-rate reserve also uses your resting heart rate, which changes the target range.

    Connected tools

    Continue with the closest related calculation without re-entering sensitive values automatically.

    ♥Maximum Heart Rate Calculator

    Compare age-predicted maximum heart-rate equations and explain individual variability.

    Open tool →    ♥Heart Rate Zone Calculator

    Build a five-zone heart-rate table using percent of max HR or heart-rate reserve.

    Open tool →    ♥Zone 2 Heart Rate Calculator

    Estimate a Zone 2 heart-rate range and explain why different methods can produce different ranges.

    Open tool →
    Medical boundary: AG Health Tools provides educational wellness estimates and private tracking utilities. It does not diagnose conditions, recommend treatment, calculate medication doses, or replace a clinician.
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