30 mph to km/h
30 mph ≈ 48.28 km/h
30 miles per hour is approximately 48.28 kilometers per hour.
How to convert 30 mph to km/h
Use the formula km/h = mph × 1.609344:
km/h = 30 × 1.609344km/h = 48.28032
So 30 mph = 48.28032 km/h, or about 48.28 km/h rounded.
Rounded values and quick estimate
- Rounded to a whole number: 48 km/h
- Rounded to one decimal place: 48.3 km/h
- Conversion factor: 1 mile per hour = 1.61 kilometers per hour
Quick mental estimate: multiply by 1.6. For 30 mph that gives about 48 km/h — within 1% of the exact answer. Use the exact formula when precision matters.
30 mph in other units
- Kilometers per hour
- 48.28 km/h
- Knots
- 26.07 kn
- Meters per second
- 13.41 m/s
- Feet per second
- 44 ft/s
30 mph and nearby values
| Miles per hour | Kilometers per hour |
|---|---|
| 26 mph | 41.84 km/h |
| 27 mph | 43.45 km/h |
| 28 mph | 45.06 km/h |
| 29 mph | 46.67 km/h |
| 30 mph | 48.28 km/h |
| 31 mph | 49.89 km/h |
| 32 mph | 51.5 km/h |
| 33 mph | 53.11 km/h |
| 34 mph | 54.72 km/h |
About miles per hour and kilometers per hour
Miles per hour is the speed unit used on roads in the US and UK.
Kilometers per hour is the road-speed unit used in most of the world. 100 km/h ≈ 62 mph.
Related conversions
Frequently asked questions
What is 30 mph in km/h?
30 miles per hour is about 48.28 kilometers per hour (30 mph ≈ 48.28 km/h).
How do you convert 30 mph to km/h?
Apply km/h = mph × 1.609344: km/h = 30 × 1.609344, km/h = 48.28032.
How many miles per hour is 48.28 km/h?
48.28 km/h is about 30 miles per hour.