Advance your pace.

A precise pace calculator for road and trail runners. Plan every segment, account for every climb, race with intent.

Basic Calculator

Quick pace, time, and distance calculations with split tables. Perfect for everyday planning.

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Advanced Calculator

Segment-based race planning. Load a GPX/KML route, define splits, calculate effort-adjusted pacing for road or trail.

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Built for serious planning

Route Upload

Drop a GPX, KML, or KMZ file. We parse elevation, distance, and terrain — all in your browser, nothing uploaded.

Segment Control

Auto-split by distance, terrain, or elevation. Then merge, split, edit, or reorder segments by hand.

Trail-Aware

Real pace adjustment for elevation using Naismith, Tobler, or Minetti models. Choose the one you trust.