Calculate target heart rate zone using the Karvonen formula with resting heart rate. Enter your age and get zone min and zone max instantly — no spreadsheet required.
Step 1. Enter your age in the first field.
Step 2. Fill in resting heart rate, zone percentage to complete the required inputs.
Step 3. The calculator instantly shows Zone Min, Zone Max, Training Zone based on the formula: Target Zone = (Max Heart Rate - Resting HR) × Zone % + Resting HR.
With the default inputs loaded in the form, the calculator produces a starting result you can use as a baseline. Change one field at a time to compare a new scenario.
The Heart Rate Zone Calculator works by applying the formula: Target Zone = (Max Heart Rate - Resting HR) × Zone % + Resting HR. Each input plays a distinct role — small changes to age can shift zone min significantly, which is why running multiple scenarios before making a decision is valuable.
To use this calculator effectively, gather accurate values for Age, Resting Heart Rate, Zone Percentage. Estimates are fine for exploration, but the more precise your inputs, the more actionable the output. The calculator instantly returns Zone Min, Zone Max, Training Zone, giving you a clear picture of where you stand.
This type of health calculation is commonly used in real planning scenarios — not just academic exercises. Whether you are comparing options, setting a target, or checking your current position, the Heart Rate Zone Calculator gives you a reliable number to work from. Always revisit the calculation if any input changes significantly.
It calculates zone min, zone max, training zone using the formula Target Zone = (Max Heart Rate - Resting HR) × Zone % + Resting HR. The inputs required are age, resting heart rate, zone percentage.
You need: Age; Resting Heart Rate; Zone Percentage. Use accurate figures from your actual situation for the most useful result.
Results are mathematically precise given the inputs you provide. The formula used is: Target Zone = (Max Heart Rate - Resting HR) × Zone % + Resting HR. Accuracy depends on how precise your input values are — estimates work for planning, but use exact figures for final decisions.
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Disclaimer: Results from this calculator are for informational and planning purposes only and do not constitute financial, legal, or professional advice. Always verify important calculations with a qualified professional.
