Speed Converter

Convert between speed units instantly — km/h, mph, m/s, ft/s, and knots. Perfect for travel, science, and navigation.

Convert between common speed and velocity units instantly

Result
Enter a value to convert
1 km/h = 0.6214 mph, 1 knot = 1.852 km/h. Conversions use exact standard factors.

How to Use This Tool

  1. 1

    Enter a speed value

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

  2. 2

    Select the source unit

    Choose the unit you are converting from: km/h, mph, m/s, ft/s, or knots.

  3. 3

    Choose the target unit

    Pick the unit you want to convert to. Use the swap button to quickly reverse the direction.

  4. 4

    View all conversions

    The result appears instantly. Below it, an 'All Units' table shows your value converted to every supported speed unit at once.

Frequently Asked Questions

How do I convert km/h to mph?
Divide by 1.60934 or use this tool. For example, 100 km/h ≈ 62.14 mph.
What is a knot?
A knot is one nautical mile per hour (1.852 km/h). It is widely used in aviation and maritime navigation.
What is the speed of sound in these units?
The speed of sound at sea level is approximately 1,235 km/h, 767 mph, 343 m/s, 1,125 ft/s, or 667 knots.
How precise are the conversions?
Results are displayed with up to 8 significant digits, providing high precision for scientific and everyday use.