20 km/h to mph
20 km/h ≈ 12.43 mph
20 kilometers per hour is approximately 12.43 miles per hour.
How to convert 20 km/h to mph
Use the formula mph = km/h ÷ 1.609344:
mph = 20 ÷ 1.609344mph = 12.427424
So 20 km/h = 12.427424 mph, or about 12.43 mph rounded.
Rounded values and quick estimate
- Rounded to a whole number: 12 mph
- Rounded to one decimal place: 12.4 mph
- Conversion factor: 1 kilometer per hour = 0.6214 miles per hour
Quick mental estimate: multiply by 0.6. For 20 km/h that gives about 12 mph — off by 0.4274 mph (3.4%). Use the exact formula when precision matters.
20 km/h in other units
- Miles per hour
- 12.43 mph
- Knots
- 10.8 kn
- Meters per second
- 5.56 m/s
- Feet per second
- 18.23 ft/s
20 km/h and nearby values
| Kilometers per hour | Miles per hour |
|---|---|
| 16 km/h | 9.94 mph |
| 17 km/h | 10.56 mph |
| 18 km/h | 11.18 mph |
| 19 km/h | 11.81 mph |
| 20 km/h | 12.43 mph |
| 21 km/h | 13.05 mph |
| 22 km/h | 13.67 mph |
| 23 km/h | 14.29 mph |
| 24 km/h | 14.91 mph |
About kilometers per hour and miles per hour
Kilometers per hour is the road-speed unit used in most of the world. 100 km/h ≈ 62 mph.
Miles per hour is the speed unit used on roads in the US and UK.
Related conversions
Frequently asked questions
What is 20 km/h in mph?
20 kilometers per hour is about 12.43 miles per hour (20 km/h ≈ 12.43 mph).
How do you convert 20 km/h to mph?
Apply mph = km/h ÷ 1.609344: mph = 20 ÷ 1.609344, mph = 12.427424.
How many kilometers per hour is 12.43 mph?
12.43 mph is about 20 kilometers per hour.