Average Speed Calculator – ProMathTools

Average Speed Calculator

Our Average Speed Calculator helps you find the overall speed of a journey, even if it has different segments with varying distances and times. Just enter the distance and time for each part of your trip, and we'll do the rest!

Distance for Segment 1

e.g., 120 (miles, km, etc.)

Time for Segment 1

e.g., 2 (hours, minutes, etc.)

Distance for Segment 2 (Optional)

e.g., 90

Time for Segment 2 (Optional)

e.g., 1.5

Distance for Segment 3 (Optional)

e.g., 50

Time for Segment 3 (Optional)

e.g., 0.75

Please enter at least one distance and time pair to calculate.

How it works

Our Average Speed Calculator helps you find the overall speed of a journey, even if it has different segments with varying distances and times. Just enter the distance and time for each part of your trip, and we'll do the rest!

The Formula

Average Speed = Total Distance / Total Time Where:
Total Distance = Sum of all distances (d1 + d2 +.)
Total Time = Sum of all times (t1 + t2 +.)

Worked Example

Example: Road Trip Average Speed
Imagine you're on a road trip. First, you drive 120 miles in 2 hours. Then, you stop for a break. After that, you drive another 90 miles in 1.5 hours. To find your average speed for the entire driving portion: Segment 1: Distance = 120 miles, Time = 2 hours Segment 2: Distance = 90 miles, Time = 1.5 hours Total Distance = 120 + 90 = 210 miles Total Time = 2 + 1.5 = 3.5 hours Average Speed = 210 miles / 3.5 hours = 60 miles per hour (mph)

Tips, Assumptions & Limitations

Ensure all your distance measurements use the same unit (e.g., miles, kilometers).
Ensure all your time measurements use the same unit (e.g., hours, minutes).
The calculator can handle up to three segments, but you only need to fill in the segments you used.

FAQ

Average speed is the total distance traveled divided by the total time taken to travel that distance. It tells you how fast an object moved on average over a specific period, even if its speed changed along the way.

Instantaneous speed is the speed of an object at a particular moment in time, like what your car's speedometer shows. Average speed, on the other hand, considers the entire journey, averaging out all the faster and slower moments.

Yes, but you must be consistent within your calculation. For example, if you input distance in miles and time in hours, your average speed will be in miles per hour (mph). If you mix units (e.g., miles and minutes), your result will be in miles per minute, which might not be what you expect. Always use consistent units for each segment.