Pace ↔ Speed Converter
Convert running pace (min/km) to speed (km/h) and vice versa — with race finish times
Pace ↔ Speed Converter
Convert running pace (min/km) to speed (km/h) and vice versa — with race finish times
Pace vs Speed — What's the Difference?
Pace and speed both describe how fast you're moving, but they measure it in opposite directions. Speed is distance per unit time (km/h or mph) — how many kilometres you cover in an hour. Pace is time per unit distance (min/km or min/mile) — how many minutes it takes to cover one kilometre. Runners typically use pace; cyclists and most other sports use speed.
Converting between the two is simple in concept — pace (seconds/km) = 3600 ÷ speed (km/h) — but doing it quickly in your head with minutes and seconds is error-prone. This converter handles both directions instantly. Enter a pace like 5:30/km and get 10.91 km/h. Enter 12 km/h and get 5:00/km.
This converter also shows projected race finish times for 1 km, 5K, 10K, half marathon, and full marathon based on your pace — so you can quickly answer "if I run at this speed, when will I finish?" It supports both metric (min/km) and can be compared in mph and min/mile for runners used to imperial units.
How to Use This Calculator
Common Pace Reference Points
- • 3:00/km — 20 km/h: Elite — sub-30min 10K pace
- • 4:00/km — 15 km/h: Competitive amateur — sub-40min 10K
- • 5:00/km — 12 km/h: Solid recreational runner — 50min 10K
- • 6:00/km — 10 km/h: Comfortable effort for most runners
- • 8:00/km — 7.5 km/h: Beginner/walk-run — relaxed finish
Why Pace and Speed Aren't Interchangeable in Practice
Race organisers and traffic authorities plan road closures and event logistics around speed (how fast the field is moving as a group), while individual runners think entirely in pace (their own personal per-kilometre target) — the two audiences for the same race genuinely need different units for different practical purposes.
Treadmills almost universally display speed in km/h or mph rather than pace, since the belt motor is mechanically controlled by a speed setting — this forces runners doing treadmill training to constantly convert between the pace they think in and the speed dial they're adjusting, which is one of the most common practical reasons for needing quick conversion.
Multi-discipline athletes face this switch constantly: triathletes and duathletes mentally shift between pace (running), speed (cycling), and pace-per-100m (swimming) within a single event, and coaches training these athletes need fluency converting between all three to build a coherent overall race plan.
?Frequently Asked Questions
5:30 per km is 5 minutes and 30 seconds = 330 seconds per km. Speed in km/h = 3600 ÷ 330 = 10.91 km/h. This converter does this instantly — just enter 5 minutes and 30 seconds in the pace box.