Kilometer per hour to Mile per hour Converter
Type a value — the answer appears instantly. 1 km/h = 0.621371 mph.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
0.621371 miles per hour
= 0.277778 m/s= 0.539957 kn
equals 0.621371 miles per hourFormula: mph = km/h × 0.62137119
Kilometer per hour to Mile per hour formula
mph = km/h × 0.62137119
Convert 5 kilometers per hour to miles per hour
- Start with 5 kilometers per hour.
- Multiply by the conversion factor: 5 × 0.621371 = 3.10686.
- So 5 km/h = 3.10686 mph.
Kilometer per hour to Mile per hour conversion table
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 0.01 km/h | 0.00621371 mph |
| 0.1 km/h | 0.0621371 mph |
| 0.25 km/h | 0.155343 mph |
| 0.5 km/h | 0.310686 mph |
| 1 km/h | 0.621371 mph |
| 2 km/h | 1.24274 mph |
| 3 km/h | 1.86411 mph |
| 4 km/h | 2.48548 mph |
| 5 km/h | 3.10686 mph |
| 6 km/h | 3.72823 mph |
| 7 km/h | 4.3496 mph |
| 8 km/h | 4.97097 mph |
| 9 km/h | 5.59234 mph |
| 10 km/h | 6.21371 mph |
| 15 km/h | 9.32057 mph |
| 20 km/h | 12.4274 mph |
| 25 km/h | 15.5343 mph |
| 30 km/h | 18.6411 mph |
| 40 km/h | 24.8548 mph |
| 50 km/h | 31.0686 mph |
| 75 km/h | 46.6028 mph |
| 100 km/h | 62.1371 mph |
| 250 km/h | 155.343 mph |
| 500 km/h | 310.686 mph |
| 1,000 km/h | 621.371 mph |
| 5,000 km/h | 3,106.86 mph |
| 10,000 km/h | 6,213.71 mph |
Unit definitions
What is a kilometer per hour?
The kilometre per hour is the metric unit for road speed, used on speedometers and speed limits in most countries. It equals 1000 metres travelled in one hour. One kilometre per hour is about 0.621 miles per hour.
What is a mile per hour?
The mile per hour is the customary speed unit in the United States and United Kingdom for road traffic and speed limits. It equals one statute mile travelled in one hour. One mile per hour is about 1.609 kilometres per hour.
Frequently asked questions
How many miles per hour are in one kilometer per hour?
One kilometer per hour equals 0.621371 miles per hour (1 km/h = 0.621371 mph).
How do I convert kilometers per hour to miles per hour?
Multiply the value in kilometers per hour by 0.621371. For example, 10 km/h × 0.621371 = 6.21371 mph.
Which is bigger — a kilometer per hour or a mile per hour?
A mile per hour is bigger: one mile per hour contains 1.60934 kilometers per hour.
Is this kilometer per hour to mile per hour converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.