❤️ Health
How to Calculate Your Running Pace (Per Mile and Per Km)
Turn a distance and a time into your pace per mile and per kilometre, learn the simple formula, and use pace to set realistic race targets.
Updated 12 October 2026 · 2 min read
Pace is the single most useful number in running. It tells you how long it takes to cover one unit of distance — usually a mile or a kilometre — and unlike raw speed it maps directly onto how a run *feels*. Once you know your pace you can plan training runs, pick a sustainable effort, and predict a finish time for any distance.
The pace formula
Pace is just your total time divided by the distance you covered. The only trick is keeping the units consistent: work in minutes and the result comes out in minutes per mile or per kilometre.
The decimal part trips people up. A pace of 5.5 minutes is not 5 minutes 50 seconds — the 0.5 is half a minute, so it's 5:30. To convert any decimal pace to minutes and seconds, multiply the part after the point by 60.
A worked example
Say you run a 5-mile route in 42 minutes. Divide 42 by 5 to get 8.4 minutes per mile. The 0.4 is 0.4 × 60 = 24 seconds, so your pace is 8:24 per mile. Your average speed is the mirror image: 5 miles in 42 minutes is 5 ÷ (42 ÷ 60) ≈ 7.1 mph.
Pace, speed and distance
- Pace and speed describe the same run from opposite ends — a faster pace is a *lower* number, while a faster speed is a *higher* one.
- To predict a race time, multiply your target pace by the race distance: an 8:24 mile pace over a 13.1-mile half marathon is about 1 hour 50 minutes.
- Most training plans are built around pace zones — easy, tempo and interval — so knowing your current pace is the starting point for every session.
Why runners track pace per mile and per km
Races and routes are measured in different units depending on where you are, so it helps to see both. The running pace calculator takes your distance and time and returns your pace per kilometre, your pace per mile and your average speed in one go — no manual decimal-to-seconds conversion required. If you mostly think in speed rather than pace, the guide to converting mph to km/h covers the other side of the same coin.
Frequently asked questions
- How do I convert a decimal pace to minutes and seconds?
- Keep the whole number as minutes and multiply the decimal part by 60 for the seconds. A pace of 5.5 minutes per km is 5 minutes and 0.5 × 60 = 30 seconds, so 5:30 per km.
- What's the difference between pace and speed?
- Pace is time per unit of distance (minutes per mile), while speed is distance per unit of time (miles per hour). A lower pace number means you're going faster, whereas a higher speed number means the same thing.
- How can I estimate a race finish time from my pace?
- Multiply your target pace by the race distance. At 5:30 per km over a 10 km race, 5.5 minutes × 10 = 55 minutes. Most runners add a little for fatigue over longer distances.