120 kilometers per hour to miles per hour
74.6 mph
120 km/h = 74.6 mph.
miles per hour
74.6mph
120 km/h = 74.6 mph
The short answer
How many miles per hour is 120 kilometers per hour?
120 km/h = 74.6 mph. 1 kilometers per hour = 0.621371 miles per hour, so the working is 120 × 0.621371 = 74.6.
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 120 × 0.621371 = 74.6
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 | 75 | +0.43546 |
| 1 decimal | 74.6 | +0.03546 |
| 2 decimals | 74.56 | −0.00454 |
Round trip: take 74.6 mph back the other way and you land on 120.0571 km/h — a drift of 0.0571 km/h. That gap is the rounding, not the conversion.
What 120 km/h looks like
120 km/h
Spanish autopistas and autovias are posted at 120 km/h for cars and motorcycles, the highest ordinary limit in the country.
Frequently asked questions
What is 120 kilometers per hour in miles per hour?
120 kilometers per hour is 74.6 miles per hour. 1 kilometers per hour = 0.621371 miles per hour, so the working is 120 × 0.621371 = 74.6.
How accurate is 74.6 mph?
Rounding to 74.6 mph and converting straight back gives 120.0571 km/h, a drift of 0.0571 km/h from the 120 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.
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