Running pace calculator

Calculate pace per kilometre or mile and average speed from a distance and elapsed time.

Your inputs stay in your browser.

Method and assumptions

Method version 1.0.0 · Updated October 2, 2026

Calculate my pace

Formula: Pace = elapsed time ÷ distance; speed = distance ÷ elapsed time.

This gives an average and does not predict future performance.

distance: Distance
distanceUnit: Distance unit
durationMinutes: Whole minutes
durationSeconds: Seconds (0 to less than 60)

Enter a distance of at least 0.01 km or miles and an elapsed time greater than zero. Conversions use the international mile (1 mi = 1.609344 km). Displayed pace is rounded to the nearest second; speed to six decimal places.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript

const minutes = 25, kilometers = 5;
const pace = minutes / kilometers;
console.log(`${Math.floor(pace)}:${String(Math.round((pace % 1) * 60)).padStart(2, "0")} min/km`); // 5:00 min/km

TypeScript

const minutes = 25, kilometers = 5;
const pace = minutes / kilometers;
console.log(`${Math.floor(pace)}:${String(Math.round((pace % 1) * 60)).padStart(2, "0")} min/km`); // 5:00 min/km

Python

minutes, km = 25, 5
pace = minutes / km
print(f"{int(pace)}:{round((pace % 1) * 60):02d} min/km")  # 5:00 min/km

Java

double pace = 25.0 / 5;
System.out.printf("%d:%02d min/km%n", (int) pace, Math.round((float) ((pace % 1) * 60))); // 5:00

double pace = 25.0 / 5;
Console.WriteLine($"{(int)pace}:{Math.Round((pace % 1) * 60):00} min/km"); // 5:00