Velocity Calculator: Speed, Distance, Time
This velocity calculator solves the basic motion formulas in one place. Find average velocity from distance and time, distance from speed and time, or the time a trip takes. Switch to the acceleration mode to get final velocity and distance traveled from an initial velocity, acceleration and time. Results appear in miles per hour, kilometers per hour, meters per second, feet per second and knots at the same time. It works with miles, kilometers, meters and feet, and seconds, minutes or hours, so you can use it for driving, running, physics homework and flight planning. All math runs in your browser.
Velocity Calculator
Find velocity, distance, time, or final velocity from acceleration.
How to use the Velocity Calculator
- Choose what to find: velocity, distance, time or final velocity.
- Enter the known values and pick the units.
- Read the result in several speed units.
- Check the steps shown under the result.
- Copy the answer for your notes.
The formulas
Velocity = distance ÷ time. Distance = velocity × time. Time = distance ÷ velocity. With constant acceleration a, final velocity v = u + a × t and distance d = u × t + ½ × a × t², where u is the initial velocity.
Features
- Velocity, distance and time
- Final velocity with acceleration (v = u + at)
- mph, km/h, m/s, ft/s and knots
- Miles, kilometers, meters and feet
- Seconds, minutes and hours
- Copy and print
Frequently asked questions
What is the velocity formula?
Average velocity equals distance divided by time, v = d ÷ t. With acceleration, the final velocity is v = u + a × t, where u is the starting velocity.
How do I convert m/s to mph?
Multiply meters per second by 2.23694 to get miles per hour. For example, 10 m/s is about 22.4 mph.
What is the difference between speed and velocity?
Speed is how fast something moves, while velocity also includes direction. For motion in a straight line, they have the same size.
How do I find the distance traveled with acceleration?
Use d = u × t + ½ × a × t². The calculator shows this in the final velocity mode.
How long does a 300 mile trip take at 60 mph?
Divide 300 by 60 to get 5 hours.