Speed converter

Enter your speed and choose the units. The answer updates as you type.

On your device · No account

Privacy details

Speed converter processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

Value

From

Converted value

Precision and other units

Decimals, fractions and scientific notation work here.

Significant digits

Send the displayed number to the notation converter in this tab. Units stay here.

Speed compares distance per elapsed time. Mach is not included because the local speed of sound depends on the medium and conditions.

The same value in other units
Unit	Value

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-09-19

How to convert speed

Speed compares distance per elapsed time. Mach is not included because the local speed of sound depends on the medium and conditions.

Multiply by the source unit factor to get the base quantity, then divide by the target factor. The other-units table compares the same value without retyping it.

Next: Acceleration converter

A worked example

60 miles per hour × 1.609344 = 96.56064 kilometers per hour.

Next: Length converter

Before you use the result

Displayed values are rounded; extra digits do not make your measurement more accurate. Speed compares distance per elapsed time. Mach is not included because the local speed of sound depends on the medium and conditions.

miles per hour (mph) to kilometers per hour (km/h): reference values

miles per hour (mph)	kilometers per hour (km/h)
1	1.609344
10	16.09344
100	160.9344

Calculated with the same conversion as the tool above.

Cite this page

Citation style

ToolOctopus. “Speed converter.” Updated 2026-09-19. https://tooloctopus.com/speed-converter.

Add an access date if your instructions require one.

Citation formatting uses citeproc-js by Frank Bennett and Citation Style Language styles. Licence and source code.