Speed converter
ConvertersConvert between kilometers per hour, miles per hour, meters per second, knots and feet per second.
Your results
Convert between km/h, mph, m/s, knots and ft/s.
How speeds are converted
We use meters per second as the reference unit. Each input is converted to m/s and from there we derive the rest with the standard conversion factors.
Where is the knot used?
The knot is the standard unit for maritime and aviation speeds. One knot equals one nautical mile per hour, about 1.852 km/h.
Frequently asked questions
Answers to the most common questions about this tool.
Which units can I convert?
Choose from the units available in this converter.
How accurate is the conversion?
It uses standard conversion factors between the selected units.
How should I round the result?
Round only to the level of precision required by your recipe, work, or measurement.
How do I enter a value to convert?
Enter a value, then select the source and destination units.
Can I use decimal values?
Yes, provided the value is valid for the selected unit.
Sources and methodology
Methodology: Speed conversion
Converts to meters per second and derives km/h, mph, knots, and feet per second.
Factors for km/h and knots are rounded in code.
References
Last reviewed
July 15, 2026