KPH to MPH
Kilometers per hour to miles per hour: 1 km/h = 0.62137 mph. Formula, a 12-row reference table, worked examples and the reverse conversion.
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What one kilometer per hour is worth in miles per hour
One kilometer per hour corresponds to 0.62137119 miles per hour here. That single figure is the whole conversion: take the number of kilometers per hour, multiply by 0.62137119, and the product is the number of miles per hour.
Reading the formula backwards gives km/h = mph ÷ 0.62137119. Dividing by 0.62137119 undoes the multiplication, and 1 mph equals 1.609344 km/h.
Kilometers per hour to miles per hour reference table
Each of the 12 rows pairs an amount in kilometers per hour with its equivalent in miles per hour. Scale up or down by powers of ten, since the ratio 0.62137119 does not change.
| Kilometers per hour (km/h) | Miles per hour (mph) |
|---|---|
| 0.5 | 0.3106856 |
| 1 | 0.62137119 |
| 2 | 1.242742384 |
| 5 | 3.106855961 |
| 10 | 6.213711922 |
| 20 | 12.42742384 |
| 25 | 15.53427981 |
| 50 | 31.06855961 |
| 100 | 62.13711922 |
| 250 | 155.3427981 |
| 500 | 310.6855961 |
| 1,000 | 621.3711922 |
Every row comes from the same function as the widget and keeps its rounding, so a figure copied from this table matches what the converter returns for that input.
Examples: turning kilometers per hour into miles per hour
For the first example, take 750 kilometers per hour. The factor is 0.62137119, so the amount comes to 466.0283942 miles per hour.
Take 6,500 kilometers per hour as the second case. The widget returns 4,038.91275 miles per hour, and that figure divided by 0.62137119 returns to about 6,500.
Going the opposite way, 55 miles per hour comes to 88.51392 kilometers per hour using the inverse ratio 1.609344.
Going from miles per hour to kilometers per hour
A dedicated page covers the opposite direction: MPH to KPH. In that case 1 mph = 1.609344 km/h.
Units outside this pair can be selected in the main Speed Converter, which uses the same unit table.
More speed converter pairs
Pages for conversions that share a unit with this one, or sit in the same list:
Frequently asked questions
How many miles per hour are in one kilometer per hour?
Each kilometer per hour corresponds to 0.62137119 miles per hour, which means 6.213711922 miles per hour for 10 kilometers per hour and 62.13711922 miles per hour for 100 kilometers per hour.
One mile per hour equals how many kilometers per hour?
One mile per hour equals 1.609344 kilometers per hour. Ten miles per hour equal 16.09344 kilometers per hour.
What does 350 km/h come to in mph?
The result is 217.4799173 mph. The widget scales the km/h figure by 0.62137119 and trims the digits shown.
What precision does the km/h to mph result use?
Yes, the displayed mph value is trimmed. The converter prints at most 10 significant digits at or above 1, at most 8 below 1, and at most 6 decimals from 1,000 up, using exponent notation for extreme sizes. Two samples from this pair: 0.123456789 km/h becomes 0.076712492 mph, and 1,234.5678 km/h becomes 767.1248658 mph.
How does the widget get from kilometers per hour to miles per hour?
Every unit in this converter stores a factor relative to one shared reference unit. The widget multiplies the input by the factor of kilometers per hour, then divides by the factor of miles per hour; for this pair that nets out to 0.62137119.
Can this converter go from mph to km/h too?
Yes. The page titled "MPH to KPH" covers it, or you can press the swap button in the widget above. The arithmetic is mph × 1.609344, so 25 mph is 40.2336 km/h.
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