Speed Converter

Convert between different speed units including meters per second, kilometers per hour, miles per hour, knots, and more.

Speed Converter

Common Speed Converter Formulas

  • 1 km/h β‰ˆ 0.278 m/s
  • 1 mph β‰ˆ 1.609 km/h
  • 1 knot β‰ˆ 1.852 km/h
  • 1 Mach β‰ˆ 1225 km/h (at sea level)

Common Speed Converter References

  • Average Walking Speed: 5 km/h
  • Average Running Speed: 10-15 km/h
  • Average Cycling Speed: 15-25 km/h
  • Typical Car Speed: 60-120 km/h
  • Commercial Airplane Speed: 800-900 km/h
  • Speed of Sound: 343 m/s

What is Speed Conversion?

Speed conversion allows you to convert velocity measurements between different units. Speed represents how fast an object moves over a given time period. Different industries and countries use different speed units - km/h is common internationally for road speeds, mph is used in the US and UK, while knots are standard in aviation and maritime navigation. Our speed converter provides instant, accurate conversions for all common velocity units.

Common Speed Units Explained

Meters per Second (m/s)

The SI unit of speed. Used in physics and scientific calculations. The speed of sound is approximately 343 m/s at sea level.

Kilometers per Hour (km/h)

The most common speed unit internationally for road vehicles. Used for speed limits, weather reports, and transportation in most countries.

Miles per Hour (mph)

Used for road speeds in the US and UK. One mph equals approximately 1.609 km/h. Common for cars, trains, and wind speeds in these countries.

Knots (kn)

Equal to one nautical mile per hour. Standard in aviation and maritime navigation worldwide. One knot equals approximately 1.852 km/h.

When to Use This Converter

Our speed converter is valuable for drivers traveling internationally, pilots and sailors converting navigation speeds, athletes comparing performance metrics, meteorologists reporting wind speeds, automotive engineers, and anyone comparing vehicle specifications from different countries.

Frequently Asked Questions

How do I convert km/h to mph?

Divide km/h by 1.609 to get mph, or multiply mph by 1.609 to get km/h. For quick estimates, km/h Γ— 0.6 β‰ˆ mph.

What is the speed of light?

The speed of light in vacuum is approximately 299,792,458 m/s, or about 1.08 billion km/h. It is the universal speed limit.