MPH to KM/H Converter

By in
Updated October 27, 2026

Speed limits are shown in miles per hour in the US and UK and in kilometres per hour almost everywhere else. One mph is about 1.609 km/h. This free MPH to KM/H converter converts instantly in both directions and includes a quick reference table.

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Type in any field to change it. Press × on a value to calculate that field instead.

How to use the MPH to KM/H converter

Type a value in Miles per hour and the other units update instantly. Every field is live, so you can just as easily start from kilometres per hour or any other unit and convert back.

MPH to KM/H formula

km/h = mph × 1.609344

1 mph = 1.60934 km/h, and 1 km/h = 0.621371 mph.

mph to km/h chart

mph km/h mph km/h
5 8.04672 55 88.5139
10 16.0934 60 96.5606
15 24.1402 65 104.607
20 32.1869 70 112.654
25 40.2336 75 120.701
30 48.2803 80 128.748
35 56.327 90 144.841
40 64.3738 100 160.934
45 72.4205 120 193.121
50 80.4672 150 241.402

km/h to mph chart

km/h mph km/h mph
10 6.21371 80 49.7097
20 12.4274 90 55.9234
30 18.6411 100 62.1371
40 24.8548 110 68.3508
50 31.0686 120 74.5645
60 37.2823 130 80.7783

Definitions

  • Miles per hour (mph): used for road speeds in the US and UK.
  • Kilometres per hour (km/h): used in most other countries.
  • Knot: one nautical mile per hour (1.852 km/h), used at sea and in aviation.

Speed limits

Typical limit mph km/h
School zone (US) 20–25 32–40
UK town 30 48
UK single carriageway 60 97
US interstate (many states) 65–75 105–121
UK motorway 70 113

Stopping distance grows fast

Doubling speed roughly quadruples braking distance. At 60 mph (97 km/h), total stopping distance is about 73 m in good conditions. See the SUVAT calculator.

Quick estimate

Multiply mph by 1.6: 50 mph × 1.6 = 80 km/h (exact 80.5).

Frequently asked questions

What is 60 mph in km/h?

96.56 km/h.

What is 100 km/h in mph?

62.14 mph.

What is 70 mph in km/h?

112.65 km/h.

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