80 mph to km/h
80 mph ≈ 128.75 km/h
80 miles per hour is approximately 128.75 kilometers per hour.
How to convert 80 mph to km/h
Use the formula km/h = mph × 1.609344:
km/h = 80 × 1.609344km/h = 128.74752
So 80 mph = 128.74752 km/h, or about 128.75 km/h rounded.
Rounded values and quick estimate
- Rounded to a whole number: 129 km/h
- Rounded to one decimal place: 128.7 km/h
- Conversion factor: 1 mile per hour = 1.61 kilometers per hour
Quick mental estimate: multiply by 1.6. For 80 mph that gives about 128 km/h — within 1% of the exact answer. Use the exact formula when precision matters.
80 mph in other units
- Kilometers per hour
- 128.75 km/h
- Knots
- 69.52 kn
- Meters per second
- 35.76 m/s
- Feet per second
- 117.33 ft/s
80 mph and nearby values
| Miles per hour | Kilometers per hour |
|---|---|
| 76 mph | 122.31 km/h |
| 77 mph | 123.92 km/h |
| 78 mph | 125.53 km/h |
| 79 mph | 127.14 km/h |
| 80 mph | 128.75 km/h |
| 81 mph | 130.36 km/h |
| 82 mph | 131.97 km/h |
| 83 mph | 133.58 km/h |
| 84 mph | 135.18 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 80 mph in km/h?
80 miles per hour is about 128.75 kilometers per hour (80 mph ≈ 128.75 km/h).
How do you convert 80 mph to km/h?
Apply km/h = mph × 1.609344: km/h = 80 × 1.609344, km/h = 128.74752.
How many miles per hour is 128.75 km/h?
128.75 km/h is about 80 miles per hour.