Speed & Velocity Converter
Speed is a scalar quantity measuring how fast an object is moving, while Velocity is a vector quantity that includes direction. In terms of unit conversion, however, they utilize the same measurement standards.
This professional converter bridges the gap between scientific physics calculations (m/s), everyday automotive travel (km/h, mph), and marine or aviation navigation (knots). It ensures precise translation for engineers, pilots, sailors, and students alike.
Metric (SI)
StandardMarine & Aviation
NavImperial / US
CommonSpeed of Sound (Mach 1)
At standard sea level conditions (15°C):
340.3 m/s
1,225 km/h
761.2 mph
661.5 knots
Common Conversions
Different fields rely on specific units for historical and practical reasons:
- m/s: The SI derived unit used in physics and engineering.
- Knot (kn): One nautical mile per hour. Used exclusively in meteorology, maritime, and air navigation. 1 knot = 1.852 km/h exactly.
- mph vs km/h: The US and UK predominantly use miles per hour for road traffic, while most of the world uses kilometers per hour.
References
How to Use This Converter
Instantly translate speed across road, air, and sea standards.
Enter Speed
Type the value into the known field (e.g., enter “100” in km/h).
View Equivalents
The tool instantly calculates the corresponding value in knots, mph, and m/s.
Copy Result
Click the button to copy the precise value to your clipboard.