Speed Converter
Instantly convert between metric and imperial speed units, from walking pace to the speed of light.
How to Use Speed Converter
Convert between km/h, mph, m/s, feet per second, knots and Mach as you type. The tool uses exact official conversion factors, so common answers come out right.
Enter a Number
Type the value you want to convert.
Pick Both Units
Choose the unit you have and the unit you want.
Read the Answer
The result updates as you type. Use the swap button to convert the other way.
Results
As you type
Accuracy
Exact factors
Swap
One click
Works on
Phone & computer
Price
100% free
Sign-up
Not needed
Speed Converter: Quick Reference
The key numbers and facts in one place.
| 60 mph | 96.56 km/h |
|---|---|
| 100 km/h | 62.14 mph |
| 1 knot | 1.852 km/h |
| 1 m/s | 3.6 km/h |
| Mach 1 | ≈ 1,225 km/h |
| 1 mph | 1.609 km/h |
What Can You Use It For?
Popular ways people use Speed Converter.
Driving Abroad
Turn mph road signs into km/h and back.
Flying & Sailing
Convert knots for boats and planes.
Sports & Fitness
Running, cycling and wind speeds.
Science
Physics homework in m/s.
Tips for the Best Result
- To turn km/h into m/s quickly, divide by 3.6.
- 1 knot is one nautical mile per hour (1.852 km/h).
- Mach depends on air temperature; this tool uses the sea-level value.
Frequently Asked Questions
Quick answers about Speed Converter.
Multiply by 1.609344. 60 mph = 96.56 km/h.
Divide by 1.609344. 100 km/h = 62.14 mph.
One nautical mile per hour — exactly 1.852 km/h.
About 1,225 km/h (761 mph) at sea level; it changes with temperature.
Yes — exact definitions (1 mile = 1,609.344 m, 1 knot = 1,852 m/h).
Yes.
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