KPH to MPH Converter
Type a speed in either box for an instant, two-way conversion between kilometres per hour (km/h) and miles per hour (mph). Below the calculator you'll find a full kph-to-mph chart for the common values.
Conversion factor: 1 km/h = 0.621371 mph. Editing either field updates the other live.
Need it while you're actually moving? Use the live GPS speedometer — it reads your real speed and shows mph and km/h at once.
KPH to MPH Chart
Common speeds from 5 to 300 km/h, converted both directions. Read left-to-right for km/h → mph, or use the right pair for mph → km/h.
| km/h | → mph | mph | → km/h |
|---|---|---|---|
| 5 km/h | 3.1 mph | 5 mph | 8 km/h |
| 10 km/h | 6.2 mph | 10 mph | 16.1 km/h |
| 15 km/h | 9.3 mph | 15 mph | 24.1 km/h |
| 20 km/h | 12.4 mph | 20 mph | 32.2 km/h |
| 25 km/h | 15.5 mph | 25 mph | 40.2 km/h |
| 30 km/h | 18.6 mph | 30 mph | 48.3 km/h |
| 40 km/h | 24.9 mph | 40 mph | 64.4 km/h |
| 50 km/h | 31.1 mph | 50 mph | 80.5 km/h |
| 60 km/h | 37.3 mph | 60 mph | 96.6 km/h |
| 70 km/h | 43.5 mph | 70 mph | 112.7 km/h |
| 80 km/h | 49.7 mph | 80 mph | 128.7 km/h |
| 90 km/h | 55.9 mph | 90 mph | 144.8 km/h |
| 100 km/h | 62.1 mph | 100 mph | 160.9 km/h |
| 110 km/h | 68.4 mph | 110 mph | 177 km/h |
| 120 km/h | 74.6 mph | 120 mph | 193.1 km/h |
| 130 km/h | 80.8 mph | 130 mph | 209.2 km/h |
| 140 km/h | 87 mph | 140 mph | 225.3 km/h |
| 160 km/h | 99.4 mph | 160 mph | 257.5 km/h |
| 180 km/h | 111.8 mph | 180 mph | 289.7 km/h |
| 200 km/h | 124.3 mph | 200 mph | 321.9 km/h |
| 220 km/h | 136.7 mph | 220 mph | 354.1 km/h |
| 240 km/h | 149.1 mph | 240 mph | 386.2 km/h |
| 260 km/h | 161.6 mph | 260 mph | 418.4 km/h |
| 280 km/h | 174 mph | 280 mph | 450.6 km/h |
| 300 km/h | 186.4 mph | 300 mph | 482.8 km/h |
Values rounded to one decimal place. Exact factor: 1 km/h = 0.621371 mph.
How to convert kilometers per hour to miles per hour
Converting kph to mph takes one multiplication: a speed in kilometres per hour times 0.621371 gives you miles per hour. That single number is why one page can answer every phrasing of the question — "kmh to mph", "km/h to mph", "kilometers per hour to miles per hour", or just "kph mph". They are all the same calculation. To reverse it, divide by 0.621371, which is the same as multiplying by 1.60934.
The reason this conversion comes up so often is that most of the world posts speed limits in kilometres per hour, while the United States and the United Kingdom use miles per hour. If you learned to drive on one system and find yourself reading the other, the numbers don't line up intuitively. A "100" sign means very different things depending on the unit: 100 km/h in mph is about 62 mph — a normal motorway speed — whereas 100 mph would be dangerously fast on most roads. Getting the direction right matters.
A few conversions are worth memorising because they map onto real speed limits. 30 km/h is roughly 19 mph (the urban limit used across much of Europe). 50 km/h is about 31 mph (the standard town limit). 90 km/h in mph is close to 56 mph, and 120 km/h is about 75 mph — typical of European and Australian motorways. If you can anchor those, you can estimate anything in between without reaching for a calculator. When precision matters, the live converter and the kph-to-mph chart above give you the exact figure.
Note that "kph", "kmph" and "km/h" are interchangeable ways of writing kilometres per hour — the slash form is the correct SI notation, but the shorthand shows up on plenty of dashboards and search boxes. Whichever spelling brought you here, the maths behind a kph to mph chart is identical, and the same 0.621371 factor is used by every accurate speedometer, GPS unit and navigation app.
When you need to convert while you're driving
A chart is perfect when you're planning at the kitchen table. But the awkward moments happen in motion: you've picked up a rental car abroad with a dashboard reading in km/h and every mental reference you have is in mph — or the reverse. Doing the multiplication at 120 km/h is exactly when you shouldn't be looking away from the road.
The same problem shows up with an imported car whose speedometer only shows the units of its origin market, and on the water, where a boat's instruments may read in knots while your harbour speed limit is posted in km/h or mph. In all of these, what you want isn't a conversion table — it's a display that already shows the unit you think in.
That's what our tools are for. The free live GPS speedometer runs in your browser and shows your real speed in mph, km/h or knots — no app install, nothing to convert in your head. For a permanent in-car setup, the MPH speedometer app gives you a large, glanceable readout with a HUD windshield mode and Picture-in-Picture, so the number you need is always the number on screen.
Converting the other way? Use the MPH to KPH converter — same live calculator and chart, mph → km/h.
KPH to MPH — frequently asked
How do you convert kph to mph?
Multiply the speed in kilometres per hour by 0.621371 to get miles per hour. For example, 100 km/h × 0.621371 = 62.1 mph. To go the other way, divide by 0.621371 (or multiply by 1.60934).
What is 90 km/h in mph?
90 km/h is about 55.9 mph (90 × 0.621371 = 55.92). It is a common motorway and rural-road limit across Europe, roughly equivalent to a 55 mph limit in the US.
What is 100 kph in mph?
100 km/h equals 62.1 mph. It is the most-searched conversion because 100 km/h is a standard highway limit in much of Europe, Australia and Canada.
Is kph the same as km/h?
Yes. "kph", "km/h", "kmh" and "kilometers per hour" all mean the same unit — kilometres travelled per hour. The official written form is km/h; kph is the common shorthand.
Stop converting in your head
See your real speed in mph, km/h or knots — live, on your phone.
Free on the App Store. No sign-up.