How much does elevation affect running pace?

As a general rule, every 100 metres of ascent adds roughly the equivalent of an extra 0.65 km of flat running effort. Descent gives back some time but not as much — about 0.2 km equivalent per 100 metres of descent. So a hilly 10K with 300m of climbing is roughly equivalent to an 11.7 km flat run in terms of effort.

Why is my flat-equivalent pace faster?

Your flat-equivalent pace strips out the elevation penalty. If you ran a hilly 10K in 50 minutes with 200m of ascent, the elevation cost you extra time. Your flat-equivalent pace shows what your effort level would translate to on a flat course — which is typically faster than your actual hilly pace.

How accurate is elevation adjustment?

The standard factors (6.5 seconds per metre of ascent, 2 seconds per metre of descent per km) work well for most runners on moderate gradients. Very steep hills (over 15%) cost more, and elite runners lose less time to hills than recreational runners. These are estimates based on research averages.

RunCalcs

Elevation-Adjusted Pace Calculator

Calculate your flat-equivalent pace from hilly run data using total ascent and descent.

Distance

Total run distance in km

Time (minutes)

Minutes component of run time

Time (seconds)

Seconds component of run time

Total Ascent

Total elevation gained in metres

Total Descent

Total elevation lost in metres

How We Calculate This

This calculator converts your actual hilly run time into a flat-equivalent performance using standard elevation cost factors.

The formula

Equivalent flat distance = Actual distance + Ascent penalty + Descent penalty

Ascent penalty = Total ascent (m) x 0.065 km per 1000m distance

Descent penalty = Total descent (m) x 0.020 km per 1000m distance

Flat-equivalent pace

Flat pace = Actual time / Equivalent flat distance

The elevation penalty shows how much extra time the hills added to your run compared to flat running at the same effort.

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates. Always consult a coach or medical professional for personalised training advice.