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Speed Converter

Convert speed between miles per hour, kilometres per hour, metres per second, knots, Mach, and more. Great for travel, physics, and aviation.

Used 50.8K times today

Enter any value to convert all units simultaneously.

Quick references:

How to Use Speed Converter

  1. 1

    Enter the speed value

    Type the speed value you want to convert into the input field.

  2. 2

    Select the source unit

    Choose the unit of your input, such as mph, km/h, m/s, or knots.

  3. 3

    View converted speeds

    All equivalent speeds in supported units are displayed instantly.

Frequently Asked Questions

What speed units are available?
The converter supports miles per hour (mph), kilometres per hour (km/h), metres per second (m/s), feet per second (ft/s), knots, and Mach number.
What is Mach 1 in km/h?
Mach 1 (the speed of sound at sea level and 15 °C) is approximately 1,225 km/h or 761 mph.
Who uses knots as a speed unit?
Knots are used in maritime navigation, aviation, and meteorology. One knot equals one nautical mile per hour, approximately 1.852 km/h.

About Speed Converter

The Speed Converter on Utilko covers the full range of velocity units used across road transport, aviation, maritime navigation, and scientific research. Converting between mph and km/h is a common need for international travellers and drivers, while pilots and sailors regularly work with knots and meteorologists use metres per second.

Physics students and engineers will appreciate support for Mach numbers and feet per second, making this one of the most comprehensive speed conversion tools available online. Every calculation is performed instantly in your browser with no server dependency.

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