Power Predict

Critical-power modeling from your Strava history

How many watts. For how long.

Power Predict fits a critical-power model to your best efforts and predicts the wattage you can sustain for a target race duration, weighted toward your recent fitness.

  1. 01 / Connect

    Connect your Strava

    Authorize once and we sync your last 180 days. No download, no waiting.

  2. 02 / Read

    See your power-duration curve

    Recent rides weighted heaviest, so it reflects current fitness.

  3. 03 / Extend

    Want your full history?

    Download your Strava archive and drop the zip in. Parsed in your browser; raw streams never leave your machine.

    Upload .zip
Predict from FTP or CP

A coarse synthesis. CP is set to 0.95 × FTP (or used directly if you enter CP); W' comes from your 1-min sprint when given, otherwise defaults to 18 kJ (middle of the trained-cyclist range). Upload an archive or sync from Strava when you can — the prediction tightens up considerably with real data.