Speed Calculator
Calculate speed from distance and time.
Distance & Time
Speed Results
Miles Per Hour
50.00 mph
Kilometers Per Hour
80.47 km/h
Meters Per Second
22.35 m/s
Knots
43.45 knots
Calculation:
100 miles ÷ 2 hours
About This Calculator
The Speed Calculator calculates speed from distance and time. Speed is the rate at which an object covers distance. Enter the distance traveled and the time taken, and the calculator will compute the speed in multiple units including mph, km/h, m/s, and knots.
This calculator supports various distance units (miles, kilometers, meters, feet) and time units (hours, minutes, seconds), automatically converting between them to provide speed in all common units.
Formula & Calculation Method
Speed Calculation:
Speed Formula:
Speed = Distance ÷ Time
Units:
mph = miles ÷ hours
km/h = kilometers ÷ hours
m/s = meters ÷ seconds
knots = nautical miles ÷ hours
Conversions:
1 mph = 1.60934 km/h
1 km/h = 0.621371 mph
1 m/s = 3.6 km/h
1 knot = 1.15078 mph
Speed is calculated by dividing distance by time. The calculator automatically converts between different unit systems to provide results in all common speed units.
How to Use This Calculator
- Enter Distance: Input the distance traveled and select the unit (miles, km, meters, feet).
- Enter Time: Input the time taken and select the unit (hours, minutes, seconds).
- View Results: See speed calculated in mph, km/h, m/s, and knots.
- Use Results: Use the calculated speed for travel planning, physics calculations, or sports performance.
Frequently Asked Questions
How do I calculate speed?
Speed is calculated by dividing distance by time. For example, if you travel 100 miles in 2 hours, your speed is 50 mph (100 ÷ 2 = 50).
What is the difference between speed and velocity?
Speed is a scalar quantity that measures how fast an object is moving (distance/time). Velocity is a vector quantity that includes both speed and direction. Speed doesn't consider direction, while velocity does.
What are knots?
Knots are a unit of speed used in aviation and maritime contexts. One knot equals one nautical mile per hour, which is approximately 1.15 mph or 1.85 km/h.
How do I convert between speed units?
Common conversions: 1 mph = 1.60934 km/h, 1 km/h = 0.621371 mph, 1 m/s = 3.6 km/h, and 1 knot = 1.15078 mph. The calculator automatically converts between all these units.
Expert Reviewed
This calculator was reviewed by NumCalculators Editorial Team, Multi-disciplinary Expert Team