Speed Converter

Convert between units of speed and velocity.

Speed & Velocity Unit Converter

Kinematics & Transportation

Convert between Kilometers per Hour (km/h), Miles per Hour (mph), Meters per Second (m/s), and Knots.

Quick Guide & Formulas

Velocity measurement tracks distance traveled per unit of time across vehicular transit, aviation navigation, marine sailing, wind meteorology, and athletic performance. This tool converts speeds between terrestrial automotive speedometers and nautical navigational standards.

How to Use This Tool

1Input the speed value you want to evaluate.
2Select the current velocity unit (e.g. km/h, mph, or Knots).
3Pick the output unit to view the exact converted speed.
4Use the swap control to quickly convert between highway miles and metric kilometers.

Key Rules & Formulas

1 km/h = 0.621371 mph = 0.277778 m/s = 0.539957 Knots
1 mph = 1.60934 km/h | 1 Knot (Nautical Mile per hour) = 1.852 km/h
The speed of sound in air (Mach 1) at sea level is approximately 1,235 km/h (767 mph).

Convert Speed

From

How to use the Speed Converter

1.Enter the value you want to convert in the left input field.

2.Select the unit you are converting from in the left dropdown.

3.Select the unit you want to convert to in the right dropdown.

4.The result will appear instantly in the right input field and summary box.

Speed & Velocity Conversion

Compare speeds from different domains easily. Whether it's road traffic limits (km/h vs mph), maritime navigation (Knots), or aviation (Mach), get the right conversions instantly.

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