Pace Calculator
Running pace and split times from distance and duration.
Guide: Pace Calculator
Running pace is time divided by distance, often expressed as minutes per kilometer or mile. This page explains how to derive pace and splits for race planning; pair it with a stopwatch and measured course for training. Pace discipline is what turns a goal time from fantasy into something your easy runs, tempo sessions, and long runs can actually support on race day.
Negative splits and race strategy
Many runners aim to run the second half slightly faster than the first. Pace calculators help you set check splits so you do not start too fast.
Heat, humidity, and hills convert equivalent effort to slower pace; adjust targets on training routes that mimic race conditions.
Track workouts and repeatability
Knowing your 400 m repeat pace from a target 5K or 10K effort helps structure interval sessions without guessing each lap.
Always include warm-up, drills, and cool-down; the pace number is for the work set, not the whole outing.
Treadmill vs outdoor pace
Treadmills may feel easier or harder depending on calibration and lack of wind resistance. Use RPE (rate of perceived exertion) as a cross-check.