Speed Converter
Convert speed and velocity units fast — mph, km/h, m/s, knots, ft/s, and Mach.
1 Miles per Hour (mph)=0 Kilometers per Hour (km/h)
Conversion Formula
Step-by-Step Calculation:
To convert 1 Miles per Hour to Kilometers per Hour, multiply by 1.609344 to get 1.609344 Kilometers per Hour.
Conversion Table
| Miles per Hour (mph) | Kilometers per Hour (km/h) |
|---|---|
| 0.01 | 0.0161 |
| 0.1 | 0.1609 |
| 1 | 1.6093 |
| 2 | 3.2187 |
| 5 | 8.0467 |
| 10 | 16.0934 |
| 20 | 32.1869 |
| 50 | 80.4672 |
| 100 | 160.9344 |
Common Speed Conversions
Unit Information & History
Miles per Hour (mph)
Definition: Unit of speed expressing the number of statute miles covered in one hour.
History: Originated in Britain and became the standard traffic speed unit across the US and UK.
Current Use: Standard measure for vehicle speed limits, navigation, and track sports in the US and UK.
Kilometers per Hour (km/h)
Definition: The metric speed unit indicating distance traveled in kilometers per hour.
History: Adopted worldwide alongside the International System of Units (SI).
Current Use: Standard traffic speed and vehicle speedometer unit in almost all countries globally.
Meters per Second (m/s)
Definition: The official SI coherent unit of velocity and speed.
History: Defined directly by the fundamental physical constants of length and time.
Current Use: Used worldwide in physics, meteorology (wind speed), aeronautics, and ballistics.
Knot (kn)
Definition: Unit of speed equal to one nautical mile per hour (exactly 1.852 km/h or ~1.151 mph).
History: Originated from counting physical knots on a line thrown off ships into the water.
Current Use: Universal international standard in maritime navigation, sailing, and aviation flight speed.
Frequently Asked Questions
Quick answers to common questions
Q:How do I convert kph to mph?
Multiply kilometers per hour by 0.621371 to get miles per hour. For example, 100 kph × 0.621371 = 62.14 mph.
Q:How many knots in a kilometer per hour?
One knot equals 1.852 km/h. To convert km/h to knots, divide by 1.852.
Q:What is the difference between mph and kph?
A mile is 1.60934 km, so a speed in mph is higher numerically than the same speed in kph. mph is used in the U.S. and UK; kph almost everywhere else.
Q:How many meters per second in 1 km/h?
1 km/h equals approximately 0.2778 m/s. To convert, divide the km/h value by 3.6.