Whether you are chasing a 5K personal best or planning marathon race day, knowing your pace is the key to running smart. This running pace calculator turns any distance and finish time into your pace per mile and per kilometer, plus your speed in mph and km/h — so you can plan even splits and hit your goal time.
How to calculate running pace
Pace is simply your time divided by the distance you covered, expressed as minutes per mile or per kilometer. Enter a distance (in km or miles) and your finish time in hours, minutes and seconds — or tap a race preset — and the calculator shows both paces side by side along with your average speed.
Worked example
Run 5 km in 25:00 and your pace is 25:00 ÷ 5 = 5:00 per km, which is about 8:03 per mile, or a speed of 12 km/h (7.5 mph). Keep that effort over 10 km and you can predict a realistic finish time before you even lace up.
Pace, speed and race targets
Pace and speed are two sides of the same coin: pace is minutes per distance, speed is distance per hour. Runners think in pace because it maps directly to the watch on race day, while treadmills usually display speed. To find a goal pace, enter your target finish time for the race distance — for example, a sub-2-hour half marathon needs roughly 5:41 per km.
Pacing tips
The most common racing mistake is starting too fast. Aim for even splits — or a slightly faster second half (a negative split) — to finish strong. Use this calculator to set a realistic target from a recent race, then practise holding that exact pace in training.