Kilometer per Hour (km/h)
Kilometers per hour express how many kilometers are covered in one hour — 1 km/h equals 1/3.6 m/s.
Kilometers per hour are the default on vehicle speedometers and road signs outside the United States.
Kilometer per Hour to Mile per Hour
Convert kilometer per hour to mile per hour instantly. Type in either field — results update live.
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Speed Kilometer per Hour Mile per Hour
1 kilometer per hour = 0.6213711923 miles per hour
Unit
Unit
Conversion table
Selected km/h values converted to mph using the exact factor from this tool.
| km/h | mph |
|---|---|
| 0.01 | 0.0062137119 |
| 0.1 | 0.0621371192 |
| 1 | 0.6213711923 |
| 2 | 1.2427423846 |
| 3 | 1.8641135769 |
| 5 | 3.1068559614 |
| 10 | 6.2137119229 |
| 20 | 12.4274238457 |
| 50 | 31.0685596144 |
| 100 | 62.1371192287 |
| 1,000 | 621.371192287 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 km/h = 0.6213711923 mph
1 mph = 1.6093439999 km/h
To convert kilometer per hour to mile per hour, multiply by 0.6213711923.
To convert mile per hour to kilometer per hour, multiply by 1.6093439999.
Example: convert 10 km/h to mph
10 × 0.6213711923 = 6.2137119229 mph
About these units
Short background on the units used in this conversion.
Mile per Hour (mph)
Miles per hour measure how many statute miles are traveled in one hour — 1 mph equals 0.44704 m/s.
Miles per hour dominate US and UK road speed limits, vehicle gauges, and aviation wind reports.
Frequently asked questions
How many miles per hour are in one kilometer per hour?
One kilometer per hour equals 0.6213711923 miles per hour. Multiply your kilometers per hour value by 0.6213711923 to convert to miles per hour.
What is the conversion formula?
mph = km/h × 0.6213711923The reverse is
km/h = mph × 1.6093439999, using the same exact factors as this converter.Is this Kilometer per Hour to Mile per Hour converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.
All kilometer per hour conversions
Jump to any speed conversion starting from kilometer per hour — including the reverse direction and every other unit in our dataset.
mile per hour (mph) → kilometer per hour (km/h)
kilometer per hour (km/h) → meter per second (m/s)kilometer per hour (km/h) → meter per hour (m/h)kilometer per hour (km/h) → meter per minute (m/min)kilometer per hour (km/h) → kilometer per minute (km/min)kilometer per hour (km/h) → kilometer per second (km/s)kilometer per hour (km/h) → centimeter per hour (cm/h)kilometer per hour (km/h) → centimeter per minute (cm/min)kilometer per hour (km/h) → centimeter per second (cm/s)kilometer per hour (km/h) → millimeter per hour (mm/h)kilometer per hour (km/h) → millimeter per minute (mm/min)kilometer per hour (km/h) → millimeter per second (mm/s)kilometer per hour (km/h) → foot per hour (ft/h)kilometer per hour (km/h) → foot per minute (ft/min)kilometer per hour (km/h) → foot per second (ft/s)kilometer per hour (km/h) → yard per hour (yd/h)kilometer per hour (km/h) → yard per minute (yd/min)kilometer per hour (km/h) → yard per second (yd/s)kilometer per hour (km/h) → mile per minute (mi/min)kilometer per hour (km/h) → mile per second (mi/s)kilometer per hour (km/h) → inch per second (in/s)kilometer per hour (km/h) → knot (kn)kilometer per hour (km/h) → knot (uk) (kn (UK))kilometer per hour (km/h) → mach (sea level, ~stp)kilometer per hour (km/h) → mach (20°c, 1 atm)kilometer per hour (km/h) → mach (si standard)kilometer per hour (km/h) → velocity of light in vacuum (c)kilometer per hour (km/h) → cosmic velocity — first (v₁)kilometer per hour (km/h) → cosmic velocity — second (v₂)kilometer per hour (km/h) → cosmic velocity — third (v₃)kilometer per hour (km/h) → earth's velocity (v⊕)kilometer per hour (km/h) → velocity of sound in pure water (c_water)kilometer per hour (km/h) → velocity of sound in sea water (20°c, 10 m) (c_sea)