Speed Converter
Built for driving, running and weather figures where the unit changes but the number in your head should not.
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Nothing you enter here is sent anywhere. There is no file and no request to our server - the work is done in your browser and disappears when you close the page.
How It Works
- Enter — Fill in the values the tool asks for.
- Run — Press the button; an empty field is reported by name rather than read as zero.
- Read — The answer comes with the working behind it, so you can check the figure.
- Take it — Copy the result, or download it where the tool offers that.
Frequently Asked Questions
Which unit definitions are used?
Exact SI-defined factors: 1 inch = 2.54 cm, 1 pound = 0.45359237 kg, 1 mile = 1609.344 m, and binary data units where 1 KiB = 1024 bytes with the KB/MB labels reported alongside their decimal 1000-based values.
Why does the tool show two answers for file sizes?
Because storage vendors and operating systems disagree. A "1 MB" drive is 1,000,000 bytes while Windows reports it as 0.95 MiB, so both the decimal and binary results are given instead of picking a side.