Enter your running speed in any format — km/h, mph, min/km, or min/mile — and the Running Speed Converter instantly converts it to all other units. You also get estimated finish times for 5K, 10K, half marathon, and marathon distances. Just fill in one field and every other value updates automatically.
Speed (km/h)
--
Speed (mph)
--
Pace (min/km)
--
Pace (min/mile)
--
5K Finish Time
--
10K Finish Time
--
Half Marathon Finish Time
--
Marathon Finish Time
--
Speed measures how fast you cover distance over time, expressed in km/h or mph. Pace flips that relationship — it measures how long it takes to cover one unit of distance, expressed as minutes per kilometer or minutes per mile. Runners commonly use pace, while treadmills often display speed.
Divide 60 by your speed in km/h. For example, running at 10 km/h gives you a pace of 60 ÷ 10 = 6:00 min/km. The converter above does this calculation automatically for any value you enter.
Multiply your speed in mph by 1.60934. So 6 mph equals 6 × 1.60934 ≈ 9.66 km/h. Conversely, divide km/h by 1.60934 to get mph.
Multiply your pace in seconds per kilometer by 1.60934 to get seconds per mile, then convert back to minutes and seconds. For example, a 6:00 min/km pace equals 6 × 60 × 1.60934 ≈ 578 seconds per mile, which is 9:38 min/mile.
To finish a marathon (42.195 km) in under 4 hours, you need to run faster than 5:41 min/km (9:09 min/mile), which equals a speed of about 10.55 km/h (6.55 mph).
Most beginner runners start at a comfortable conversational pace between 7:00–9:00 min/km (11:15–14:30 min/mile), which equates to roughly 6.7–8.6 km/h. As fitness improves, pace naturally increases over weeks of consistent training.
Treadmills display speed in km/h or mph. A treadmill set to 10 km/h (6.2 mph) corresponds to a 6:00 min/km or 9:39 min/mile pace. Use this converter to match any treadmill setting to your preferred pace format.
Meters per second (m/s) is the SI unit for speed. It is rarely used by distance runners but is common in sprinting and athletic science. You can convert km/h to m/s by dividing by 3.6. For example, 10 km/h = 2.78 m/s.