Speed Converter

Convert between km/h, mph, m/s, knots, and more instantly in your browser. Free online speed converter — kph to mph & more.

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Results

Result —
DetailValue
km/h—
mph—

What is this calculator for?

Convert speeds between kilometers per hour, miles per hour, meters per second, knots, and feet per second.

How to Use This Calculator

Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.

  1. Value — enter a numeric amount.
  2. From — enter a choice from the options.
  3. To — enter a choice from the options.
  4. Review your results — the key output is highlighted, with supporting figures below.

What You'll Need

Value
a numeric amount · required
From
a choice from the options (Kilometers/hour (km/h), Miles/hour (mph), Meters/second (m/s), Knots (kn), Feet/second (ft/s)) · optional
To
a choice from the options (Kilometers/hour (km/h), Miles/hour (mph), Meters/second (m/s), Knots (kn), Feet/second (ft/s)) · optional

About This Calculator

This converter uses the international base of one meter per second and converts from there, so every unit matches precisely in both directions.

Km/h and mph equivalents are shown alongside your target. Everything is computed locally in your browser.

Worked Examples

Example

62.137 mph

Frequently Asked Questions

Why is mph different from knots?
A knot is one nautical mile per hour (1.852 km/h), while a statute mile is 1.609 km. A knot is faster than a mile per hour by about 15%.
How do I mentally convert km/h to mph?
Multiply by 0.62137, or approximate by dividing by 1.6. Conversely, multiply mph by 1.609 for km/h.