Free running tools

Train smarter, not just harder.

Fast, no-signup calculators for runners — pace, race-time prediction and calories. Built for your 5K, 10K, half and full marathon goals.

Pace Calculator

Find your pace and speed from any distance and time. Switch km/miles.

Predict your 5K, 10K, half or marathon time from a recent result.

Estimate calories burned running, based on your weight and effort.

Estimate your aerobic fitness from a 12-min test or heart rate.

Get your 5 training zones in bpm from age or max heart rate.

Convert steps to km and miles, plus calories walking or running.