Grade Adjusted Pace Calculator

You're faster than you think. Convert your elevation gain into flat-equivalent speed.

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What is Grade Adjusted Pace (GAP)?

GAP estimates the equivalent pace on flat land for a given effort on hilly terrain. Running uphill requires significantly more energy, so your "real" pace is faster than your watch shows.

How is this calculated?

We use the Minetti (2002) energy cost formula. We analyze your GPX segment by segment, calculating the gradient and applying an energy cost multiplier.

Privacy

Your GPX file stays in your browser. Nothing is uploaded.

How does this compare to Strava GAP?

Strava uses a proprietary formula. TrailSplits uses the peer-reviewed Minetti (2002) metabolic cost model, which accounts for both uphill and downhill energy costs. The result is a transparent, science-based calculation you can verify.