km/h to mph Converter

Divide kilometers per hour by 1.609344 to get miles per hour.

100 km/h = 62.1371192237 mph

Convert miles per hour to kilometers per hour instead

Formula

1 km/h = 0.6213711922 mph

miles per hour = kilometers per hour ÷ 1.609344

Worked example

Convert 100 kilometers per hour to miles per hour

  1. Divide by 1.609344
  2. 100 ÷ 1.609344 = 62.1371

100 km/h = 62.1371 mph

Good to know

Common limits: 30 km/h ≈ 18.6 mph, 50 km/h ≈ 31.1 mph, 100 km/h ≈ 62.1 mph, 120 km/h ≈ 74.6 mph and 130 km/h ≈ 80.8 mph. Multiplying by 0.6 and adding a little gives a quick estimate.

Conversion table

Kilometers per hour to miles per hour conversion table
Kilometers per hour (km/h)Miles per hour (mph)
106.21371
2012.4274
3018.6411
4024.8548
5031.0686
6037.2823
7043.496
8049.7097
9055.9234
10062.1371
11068.3508
12074.5645
13080.7783
200124.274

About these units

Kilometer per hour (km/h)
The usual unit for road speeds outside the US and UK.
Mile per hour (mph)
Exactly 1.609344 km/h. Used for road speeds in the US and UK.