Speed Converter
Convert between metric and imperial speed units instantly
Popular Speed Conversions
Speed Conversion
1 m/s = 3.6 km/h
Speed Units Reference
| Unit | Symbol | Equals (m/s) |
|---|---|---|
| Meter per Second | m/s | 1 m/s |
| Kilometer per Hour | km/h | 0.277778 m/s |
| Mile per Hour | mph | 0.44704 m/s |
| Foot per Second | ft/s | 0.3048 m/s |
| Knot | kn | 0.514444 m/s |
Common Speed References
Transportation
Walking speed: 3-4 mph (5-6 km/h)
Cycling speed: 12-15 mph (19-24 km/h)
Highway speed: 65-80 mph (105-130 km/h)
Commercial jet: 500-600 mph (800-965 km/h)
Speed of sound: 767 mph (1,235 km/h)
Scientific & Natural
Earth rotation: 1,037 mph (1,670 km/h)
Earth orbit: 67,000 mph (107,800 km/h)
Light speed: 186,282 mps (299,792 km/s)
Escape velocity: 25,020 mph (40,270 km/h)
Terminal velocity: 120 mph (200 km/h)
About Speed Converter
Our speed converter supports all major metric and imperial units. Whether you're converting MPH to KM/H for travel planning, meters per second to kilometers per hour for physics calculations, or knots to miles per hour for marine navigation, our tool provides accurate conversions instantly.
The tool automatically saves your recent conversions in your browser, making it easy to perform similar conversions later. Perfect for travelers, pilots, sailors, engineers, students, and anyone who needs quick speed conversions.
How to Use
- 1
Select from unit
Choose the unit you want to convert from (e.g., mph, km/h, m/s)
- 2
Select to unit
Choose the unit you want to convert to (e.g., km/h, mph, knots)
- 3
Enter value
Type the speed value you want to convert
- 4
View result
The converted speed appears automatically in the result field
Frequently Asked Questions
What is the difference between speed and velocity?
What is the difference between speed and velocity?
Speed is how fast something moves (scalar quantity), while velocity includes both speed and direction (vector quantity). For everyday conversions, we typically work with speed. In physics, velocity is speed in a specific direction.
Why are there different speed units?
Why are there different speed units?
Different units evolved for different uses. MPH and KM/H are common for vehicles. Knots are used in aviation and marine navigation. M/S is the SI unit used in science. Each has advantages in its specific context.
How do I convert between MPH and KM/H quickly?
How do I convert between MPH and KM/H quickly?
For quick estimates: To convert MPH to KM/H, multiply by 1.6. To convert KM/H to MPH, multiply by 0.6. For exact conversions: 1 MPH = 1.60934 KM/H, and 1 KM/H = 0.621371 MPH.
What speed units are used in different fields?
What speed units are used in different fields?
Aviation uses knots and sometimes Mach numbers. Marine navigation uses knots. Cars use MPH (US/UK) or KM/H (most countries). Science uses M/S. Athletics often uses M/S for sprints and KM/H or MPH for marathons.