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.
Pace is more actionable for runners because it maps directly to time goals. "I need to run at 5:00/km" tells you exactly how to feel each kilometre and lets you calculate finish times by simple multiplication. Speed (km/h) requires extra mental arithmetic. GPS watches show pace by default because that's what most runners plan training around.
For a first-time 5K runner, finishing in 30–40 minutes (6:00–8:00/km, 7.5–10 km/h) is a solid goal. Intermediate runners target sub-25 minutes (5:00/km, 12 km/h). Competitive club runners aim for sub-20 (4:00/km, 15 km/h). Elite runners race at 2:40–3:00/km (20–22.5 km/h).
1 mile = 1.60934 km. So to convert min/km to min/mile, multiply by 1.60934. A 5:00/km pace = 5:00 × 1.60934 = 8:03/mile. This converter shows both automatically when you enter a pace or speed.
Treadmill belt motors are mechanically controlled by a speed setting (km/h or mph), which is a more direct engineering parameter than pace for the machine itself, even though runners think in pace for training purposes. This is why treadmill runners often need to do a quick pace-to-speed conversion before setting their target — a treadmill speed of 12 km/h corresponds to a 5:00/km pace, for example.
Triathletes typically think in pace-per-100m for swimming, speed (km/h) for cycling, and pace-per-km for running — three completely different units within one race. Most triathlon-specific GPS watches display all three automatically per discipline, but athletes and coaches still need fluency converting between them when planning overall race pacing strategy or comparing effort levels across the three legs.
A useful mental shortcut: divide 60 by the speed in km/h to get pace in minutes per km. At 12 km/h, 60 ÷ 12 = 5, so pace is 5:00/km. At 10 km/h, 60 ÷ 10 = 6:00/km. This works cleanly for whole numbers; for more precise or non-round speeds, a calculator like this one removes the rounding error that quick mental math introduces.