Speed Converter
Convert between speed units
How to Use
1
Enter a value
Input the speed value you want to convert.
2
Select source unit
Choose the unit you are converting from (e.g., km/h, mph, m/s).
3
View all conversions
See the equivalent value in all other speed units instantly.
4
Copy any value
Click on any conversion result to copy it to your clipboard.
Frequently Asked Questions
How do I convert km/h to mph?
Divide km/h by 1.609. For example, 100 km/h = 62.1 mph.
What is a knot?
A knot is 1 nautical mile per hour, equal to 1.852 km/h or 1.151 mph. It's used in maritime and aviation.
What is Mach speed?
Mach 1 is the speed of sound, approximately 343 m/s or 767 mph at sea level. Mach 2 is twice that speed.
Is the speed of light exact?
Yes, the speed of light is exactly 299,792,458 m/s by definition. This is a fundamental constant of nature.