Question 1

How do I convert kilometers per hour to miles per hour?

Accepted Answer

To convert kilometers per hour to miles per hour, use our converter above. Simply enter the value in kilometers per hour and get instant, accurate results in miles per hour. Our tool handles all speed calculations for you.

Question 2

What's the difference between speed and velocity?

Accepted Answer

Speed measures how fast something moves (scalar). Velocity includes both speed and direction (vector). In everyday use, people often say 'speed' when technically discussing velocity.

Question 3

Why do airplanes use knots instead of mph?

Accepted Answer

Knots (nautical miles per hour) relate directly to latitude coordinates, making navigation easier. One minute of latitude equals one nautical mile, simplifying aviation and maritime calculations.

Question 4

How do I convert between meters per second and mph?

Accepted Answer

To convert m/s to mph, multiply by 2.23694. To convert mph to m/s, multiply by 0.44704. Meters per second is the SI unit used in physics and science.

Question 5

Can I use this for running pace conversions?

Accepted Answer

Yes! You can convert between pace (minutes per mile or kilometer) and speed (mph or km/h). For example, a 7-minute mile is about 8.6 mph or 13.8 km/h.

Question 6

What speed units do different countries use?

Accepted Answer

Most countries use kilometers per hour (km/h). The United States and United Kingdom primarily use miles per hour (mph). Aviation worldwide uses knots, while science uses meters per second (m/s).

Question 7

How fast is the speed of sound?

Accepted Answer

The speed of sound at sea level is approximately 343 m/s, 1,235 km/h, or 767 mph (Mach 1). This speed varies with temperature and altitude.

Question 8

What's the fastest human running speed?

Accepted Answer

Usain Bolt reached 27.8 mph (44.7 km/h) during his world record 100m sprint. Average jogging is 5-6 mph, while professional marathon runners maintain about 12-13 mph.

Kilometer per Hour (km/h)	Mile per Hour (mph)
1	0.6214
2	1.2427
3	1.8641
4	2.4855
5	3.1069
10	6.2137
15	9.3206
20	12.4274
25	15.5343
50	31.0686
75	46.6029
100	62.1372
250	155.3429
500	310.6858
1,000	621.3717

Kilometer per Hour to Mile per Hour Converter

Conversion Formula

About Kilometer per Hour

About Mile per Hour

How to Convert Kilometer per Hour to Mile per Hour

Common Kilometer per Hour to Mile per Hour Conversions

Conversion Reference Table

Real-World Speed Conversions

Driving and Road Travel

Running and Athletics

Aviation and Flight

Weather and Wind Speed

Cycling and Biking

Maritime and Boats

Speed Conversion FAQs