Speed Calculator
Calculate speed, distance, or time using the speed formula
Your Input
Select a calculation type (speed, distance, time, or convert), enter values and units, then click Calculate to see the result and step-by-step solution.
Complete User Guide
What is Speed?
Speed is the rate at which an object covers distance. It is calculated as distance divided by time.
How to Use
- Select calculation type
- Enter known values and select units
- Click Calculate to see the result and step-by-step solution
- Use Reset to clear and hide results
Formulas
Speed: v = d / t
Distance: d = v × t
时间: t = d / v
v = speed, d = distance, t = time
Speed Units
km/h: Kilometers per hour
mph: Miles per hour
m/s: Meters per second
knots: Nautical miles per hour
ft/s: Feet per second
Common Conversions
1 km/h = 0.621371 mph
1 mph = 1.60934 km/h
1 m/s = 3.6 km/h
1 knot = 1.852 km/h
Example Calculations
Speed: 100 km in 2 hours = 50 km/h
Distance: 60 km/h × 3 hours = 180 km
时间: 300 km ÷ 100 km/h = 3 hours
Important Notes
- Speed is a scalar quantity (magnitude only)
- Velocity includes direction (vector)
- Average speed = total distance / total time
- Instantaneous speed is speed at a moment
- Units must be consistent for accurate results
Common Applications
- Travel planning
- Sports performance
- Vehicle speed calculations
- Physics problems
- Navigation