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KM/H to MPH Converter

Convert kilometers per hour to miles per hour instantly, with a reference table of speed limits worldwide.

KMH to MPH Converter

1 km/h = 0.6214 mph

Multiply kilometers per hour by 0.62137119 to get miles per hour.

The link carries the values you entered, so whoever opens it sees the same result. Nothing is stored on our side — the numbers travel in the link itself.

Kilometers per hour to miles per hour reference table

The conversions people look up most often, rounded to 4 decimal places.

Common kilometers per hour to miles per hour conversions
Kilometer per hour (km/h)Mile per hour (mph)
10 km/h6.2137 mph
20 km/h12.4274 mph
30 km/h18.6411 mph
50 km/h31.0686 mph
60 km/h37.2823 mph
80 km/h49.7097 mph
90 km/h55.9234 mph
100 km/h62.1371 mph
110 km/h68.3508 mph
120 km/h74.5645 mph
130 km/h80.7783 mph
160 km/h99.4194 mph
200 km/h124.2742 mph

The kilometers per hour people look up most

50 km/h = 31.0686 mph
The standard urban limit in most of Europe, a shade above the 30 mph the UK uses.
100 km/h = 62.1371 mph
A rural dual-carriageway limit across much of Europe, and not the 60 mph the round number suggests.
120 km/h = 74.5645 mph
A standard European motorway limit, and the figure a British driver needs when hiring a car abroad.
130 km/h = 80.7783 mph
The French autoroute limit in dry weather, and the German advisory speed on the autobahn.

How the kmh to mph calculation works

The factor is the same one that converts the distances, since both speeds are "per hour":

mph = km/h ÷ 1.609344

Driving abroad is the usual reason to convert, and the round numbers do not line up:

km/h mph Where
30 18.6 Urban limit, much of Europe
50 31.1 Standard urban limit
80 49.7 Rural single carriageway
100 62.1 Rural dual carriageway
110 68.4 Australian highway
120 74.6 European motorway
130 80.8 French autoroute

Note that 100 km/h is 62 mph, not 60 — a distinction that matters where enforcement is automated and tolerances are a few percent.

The German autobahn's Richtgeschwindigkeit is an advisory 130 km/h, or 80.8 mph, on the derestricted sections.

A UK or US car in Europe shows both scales, with mph on the outer ring and km/h inside. A rental with a metric-only display is the common trap: 120 on the dial in France is legal, and the same 120 in Britain is 74 mph over an urban limit.

Two shortcuts:

  • Take off a third, roughly. 120 km/h → 80 mph, against a true 74.6. Crude but conservative in the safe direction.
  • Better: multiply by 6 and drop a zero, then add 2%. 120 → 720 → 72 → 73.4. Within a percent.

The precise reciprocal is 0.621371 mph per km/h.

Frequently asked questions

How do I get metres per second from km/h?

Divide by 3.6: one km/h is 0.2778 m/s, and 100 km/h is 27.78 m/s. Metres per second is the unit physics uses, and the relationship matters because kinetic energy rises with the square of speed - a car at 100 km/h carries 2.8 times the energy it has at 60 km/h, not half as much again. The mph figure hides that, because the arithmetic is harder to do in your head.

Why do the signs change at the Canadian border?

Canada converted its road signs to kilometres in 1977 and the United States did not. A 100 km/h Ontario limit becomes a 65 mph New York one within a few hundred metres - 62.1 against 65, so the change of unit is far more startling than the change of speed. Canadian cars carry both scales on the dial for the same reason British cars sold in Europe do.

Is a 30 km/h zone slower than a 20 mph one?

Yes, though only just. Twenty miles per hour is 32.2 km/h, so a 30 km/h zone - now the standard in a growing number of European cities - is about 7% slower than a British 20 mph street. The two are close enough to be described as the same policy and far enough apart that a driver used to one will be over the other’s limit.

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Further reading