How to use the speed calculator
- 1 Choose what to solve for: speed, distance or time.
- 2 Enter the distance and its unit.
- 3 Enter the time in hours, minutes and seconds, or the speed.
- 4 Read the result in every unit, plus the pace.
Worked example
A 150-mile drive that takes 2 hours 30 minutes. Average speed = 150 ÷ 2.5 = 60 mph, which is 96.56 km/h, 26.82 meters per second or 52.14 knots. The pace is 1 minute per mile.
Speed, distance and time
- Speed = distance ÷ time.
- Distance = speed × time.
- Time = distance ÷ speed.
- Include stops for real average speed.
Convert units with the Speed Converter and Miles to km, and time a trip with the Elapsed Time Calculator. Building a speed sensor? Read its resistors with the Resistor Color Code Calculator.
How it works: Distances are converted to meters and times to seconds, the formula is applied, and the answer is converted to every common unit: miles and kilometers per hour, meters and feet per second, and knots. Pace is the time needed to cover one mile or one kilometer at the calculated speed, which runners and cyclists use more than speed itself. For a trip with stops, enter the total time including breaks to get your true average.
Features
Solve for anything
Speed, distance or time.
Every unit
mph, km/h, m/s, knots and ft/s.
Pace too
Minutes per mile and per kilometer.
When to use it
Road trips
How long the drive takes at your speed. Plan fuel with the Gas Cost Calculator.
Running and cycling
Your average speed and pace.
Physics homework
Speed = distance ÷ time problems.
Unit conversion
Convert units with the Speed Converter.
Related Science tasks
Frequently asked questions
How do you calculate speed?
Speed = distance ÷ time. 150 miles in 2.5 hours is 60 mph.
How do you calculate distance?
Distance = speed × time. At 60 mph for 2.5 hours you travel 150 miles.
How do you calculate time?
Time = distance ÷ speed. 150 miles at 60 mph takes 2.5 hours, or 2 hours 30 minutes.
How do I convert mph to km/h?
Multiply by 1.609344. 60 mph is 96.56 km/h. To go back, multiply km/h by 0.621371.
What is average speed?
Total distance divided by total time, including stops. It is usually lower than your cruising speed.
How do I find my running pace?
Divide your time by the distance. At 60 mph the pace is 1 minute per mile; at 6 mph it is 10 minutes per mile.
What is a knot?
One nautical mile per hour: 1.15078 mph or 1.852 km/h. It is used for ships and aircraft.
How long does it take to drive 100 miles at 65 mph?
About 1 hour 32 minutes.
What is the difference between speed and velocity?
Speed is how fast something moves; velocity is speed in a particular direction.
How do I convert minutes to hours?
Divide by 60. 30 minutes is 0.5 hours. Enter hours and minutes separately and the calculator handles it.
How fast is walking, running and cycling?
A typical walking speed is about 3 mph (4.8 km/h), an easy run about 6 mph (a 10-minute mile), and casual cycling about 10 to 12 mph.
How do I work out speed from a stopwatch time?
Measure a known distance, time it, and enter both. 100 meters in 12.5 seconds is 8 meters per second, or about 17.9 mph.
How do I find average speed for a round trip?
Divide the total distance by the total time. It is not the average of the two speeds: 60 mph out and 40 mph back averages 48 mph.
How many feet per second is 60 mph?
88 feet per second.
Built and reviewed by Hamza Farooq, founder and lead developer
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