Enter the total distance and total time traveled into the calculator to determine the average car speed.

## Car Speed Formula

The following formula is used to calculate the speed of a car.

CS = D/T
• Where CS is the car speed
• D is the total distance
• T is the total time

To calculate the car speed, simply divide the total distance by the total time.

## Car Speed Definition

What is car speed? Car speed is defined as the velocity of a moving vehicle. It is typically calculated by dividing the total distance by total time.

## Example Problem

How to calculate car speed?

1. First, determine the distance.

For this example, the car was in a drag race of a quarter-mile = .25 miles.

2. Next, determine the time.

The car completed the quarter-mile drag race in 12 seconds.

3. Finally, calculate the average speed.

Using the formula above, the average speed is calculated to be .25/(12/60/60) = 75 mph. In this problem, the 12 seconds is converted to hours by dividing by 60 twice.