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Pace a route

Drop in a GPX or TCX route and your numbers — CdA, Crr, weight, FTP, W′ — plus the wind. It works out the power to hold over each climb, descent, and headwind, tracks the W′ you spend along the way, and exports the plan as a Zwift or head-unit workout. It all runs in your browser; nothing is uploaded.

1 · Your route

A GPX or TCX file — export one from RideWithGPS, Strava, Komoot, or Garmin Connect.

Drop a .gpx or .tcx file here or click to choose a file

2 · Your numbers

Best estimates are fine — this is a model. Later, in the app, these come from your own data.

Rider & bike

Rider weight kg

Bike + kit kg

FTP W (used as CP)

W′ kJ

Aero & rolling

CdA m²

Crr rolling

Position: Surface:

Conditions

Wind speed km/h

Wind from ° (0=N, 90=E)

Air temp °C

3 · Your pacing plan

Optimal power over the course, and the W′ battery draining and recharging beneath it.

Effort dig deep

Set your numbers, then compute.

Hit Compute pacing to model the ride.

4 · Export the workout

Load the plan onto Zwift or your head unit. ERG files hold the power targets by time; the FIT course carries the actual route + targets for outdoor navigation.

Simplified — fewer steps, easy to follow on a head unit outdoors. Detailed — tracks every gradient change, ideal in ERG on Zwift & co. (The FIT course is always full-resolution.)

It's a model. It assumes you can hold the planned power and that your CdA, Crr, and W′ are right; outdoors, road surface, draft, and corners all bite, so treat the absolute time as a best case. The pacing shape — where to push and where to ease — is the dependable part. The same thing from your real ride data, capped by what you can actually push, is built into the free Adaptive Training app.