Speed Converter

What is Speed?

Speed measures how fast something is moving, typically expressed as distance traveled per unit of time. Common speed units include kilometers per hour (km/h), miles per hour (mph), and meters per second (m/s).

How to Use This Converter

Select your speed conversion below. Enter the speed value and instantly convert between different speed units.

Common Uses

• Converting vehicle speeds between km/h and mph
• Converting wind speeds for weather reports
• Converting running pace between different units
• Converting nautical speeds (knots) for sailing

Quick Reference Tips

• 1 km/h ≈ 0.621 mph
• 1 m/s = 3.6 km/h
• 1 knot ≈ 1.852 km/h (nautical mile per hour)
• Speed of sound ≈ 343 m/s at sea level