Skip to content

Cycling Power Zones Calculator

W
%

Result

Zone watts187.5
↗ Health

Cycling Power Zones Calculator — free online calculator.

Formula

Selected power target (W) = functional threshold power FTP (W) × entered zone percentage / 100. This computes one wattage at a user-specified percentage; it does not determine named training-zone boundaries or prescribe a workout.
  • Cycling Power Zones Calculator calculates its result from FTP (W), Zone percent (%). It uses the formula Calculated with the verified ST Calculator runtime.. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
  • The main inputs are FTP, Zone percent. Enter them in the units and format shown in the calculator.
  • Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Cycling Power Zones

Inputs
  • FTP: 250 W
  • Zone percent: 75 %

Using FTP (W) = 250, Zone percent (%) = 75, the calculated result is Zone watts: 187.5.

Sample result: Calculating…

Frequently asked questions

What does the Cycling Power Zones calculate?

Cycling Power Zones Calculator — free online calculator.

Which values should I enter?

Enter FTP, Zone percent using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Selected power target (W) = functional threshold power FTP (W) × entered zone percentage / 100. This computes one wattage at a user-specified percentage; it does not determine named training-zone boundaries or prescribe a workout..

Why might my result differ from another source?

Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026