Speed Calculator
Calculate speed, distance, or time instantly. Supports various units including miles, kilometers, meters, knots, hours, minutes, and seconds.
Speed Distance Time Formula
The relationship between speed, distance, and time is fundamental in physics and everyday life.
Speed = Distance / Time
- Speed ($v$): How fast an object is moving. Common units: mph, km/h, m/s.
- Distance ($d$): How far an object travels. Common units: miles, km, meters.
- Time ($t$): How long the travel takes. Common units: hours, minutes, seconds.
Common Speed Units
- mph (miles per hour): Standard in the US and UK for road traffic.
- km/h (kilometers per hour): Standard globally for road traffic.
- m/s (meters per second): Standard scientific (SI) unit for physics.
- Knots (nautical miles per hour): Used in aviation and maritime navigation.
- Mach: Speed of sound. Mach 1 is approx 340 m/s at sea level.
? Frequently Asked Questions
Average speed is Total Distance divided by Total Time. For example, if you drive 100 miles in 2 hours, your average speed is 50 mph.
1 Knot is approximately 1.15 mph (or 1.85 km/h). It is based on nautical miles.
Yes! You can enter distance in miles and time in minutes, then output the speed in km/h. The calculator handles all intermediate conversions automatically.