Pace vs speed - what's the difference?

Same physics, inverted convention. Speed is distance per time (e.g. 10 km/h); pace is time per distance (e.g. 6:00 / km). Runners talk in pace because it makes split times trivial - to run a marathon in 4 hours you need a pace of 5:41 / km, and 5:41 is the same number you'll see on the watch every kilometre.

Does it account for elevation?

No. Pace calculations are flat-ground only. Real-world pace on a hilly course can be 30 seconds per km slower than the flat equivalent; experienced runners adjust on the fly.

Calculateur d'allure

Allure, distance, temps - donnez-en deux, on calcule le troisième. Splits en km et miles.

Fonctionne dans votre navigateur

Remplissez deux des trois champs - allure, distance, temps - on calcule le troisième. Allure en min/km et min/mi. Splits pour 5K, 10K, semi et marathon affichés en dessous.

Unité de distance

Calculer

Distance (km)

Temps (HH:MM:SS)

Allure (min:sec / unité)

Distance

10.00 km

Temps

00:50:00

Allure / km

5:00 / km

Allure / mi

8:03 / mi

Splits à cette allure

5K00:25:00
10K00:50:00
Half01:45:29
Marathon03:30:59

Comment l'utiliser

Pick what to solve for
Pace, time, or distance - the field with the spinner becomes the output.
Fill the other two
Pace as min:sec / km, time as HH:MM:SS, distance in km or mi (toggle units).
Read splits
Per-kilometre and per-mile splits for 5K, 10K, half, marathon are shown below.

Qu'est-ce que c'est ?

A pace calculator solves the three-variable triangle of distance, time and pace. With any two known, the third is one division away. The interesting parts are formatting (min:sec / km is the runner's standard, not decimal minutes), units (km / mi side-by-side because most races still publish in mi internally), and the per-distance split tables.

Quand l'utiliser

Planning a race day: 'I want to break four hours on the marathon - what pace do I need?'. Working backwards from a training run: '8 km in 41:36, what was my pace?'. Comparing two efforts on different distances: 'is today's 5K at 4:20 / km faster or slower than last week's 10K at 4:40 / km?'.

Erreurs courantes

Confusing decimal minutes (1.5 min) with min:sec (1:30 min); the calculator accepts both formats but it's easy to typo. Targeting a pace that's faster than your race pace by accident - 4:00 / km looks similar to 4:30 / km but the time difference at marathon distance is huge (2:48 vs 3:09). And forgetting that 'easy pace' for endurance runs is 60-90 seconds per km slower than race pace.

FAQ

Pace vs speed - what's the difference?: Same physics, inverted convention. Speed is distance per time (e.g. 10 km/h); pace is time per distance (e.g. 6:00 / km). Runners talk in pace because it makes split times trivial - to run a marathon in 4 hours you need a pace of 5:41 / km, and 5:41 is the same number you'll see on the watch every kilometre.
Does it account for elevation?: No. Pace calculations are flat-ground only. Real-world pace on a hilly course can be 30 seconds per km slower than the flat equivalent; experienced runners adjust on the fly.

Convertisseur d'unités

Convertissez longueur, poids, température, volume et plus.

Calculateur de durée

Combien d'heures, minutes ou secondes entre deux heures - ou deux dates complètes - dans votre navigateur.

Calculateur d'IMC

Calculez votre indice de masse corporelle en métrique ou impérial.