1 kilometers per hour to miles per hour
0.6 mph
1 km/h = 0.6 mph.
miles per hour
0.6mph
1 km/h = 0.6 mph
The short answer
How many miles per hour is 1 kilometers per hour?
1 km/h = 0.6 mph. 1 kilometers per hour = 0.621371 miles per hour, so the working is 1 × 0.621371 = 0.6.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 kilometers per hour = 0.621371 miles per hour 1 × 0.621371 = 0.6
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (mph) | Off by |
|---|---|---|
| Whole number | 1 | +0.37863 |
| 1 decimal | 0.6 | −0.02137 |
| 2 decimals | 0.62 | −0.00137 |
Round trip: take 0.6 mph back the other way and you land on 0.9656 km/h — a drift of 0.0344 km/h. That gap is the rounding, not the conversion.
Frequently asked questions
What is 1 kilometers per hour in miles per hour?
1 kilometers per hour is 0.6 miles per hour. 1 kilometers per hour = 0.621371 miles per hour, so the working is 1 × 0.621371 = 0.6.
How accurate is 0.6 mph?
Rounding to 0.6 mph and converting straight back gives 0.9656 km/h, a drift of 0.0344 km/h from the 1 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
KM/H to MPH Converter
Kilometers per hour to miles per hour — read a metric speed limit in your own units.
Open the km/h to mph converter →