Math calculator
Speed Calculator
Calculate speed by dividing distance by travel time.
Quick answer
How do you calculate speed?
Speed = distance ÷ time. Driving 150 miles in 2.5 hours is 150 ÷ 2.5 = 60 mph. Rearrange to find time (distance ÷ speed) or distance (speed × time).
Speed = distance / time • Distance = speed × time • Time = distance / speed
⚡ Answer updates as you type · Enter = calculate · Esc = reset
The Speed Calculator divides distance by time to estimate speed.
About this Speed Calculator
Calculate average speed, total distance, or travel time when you know any two of the three values. Works in MPH, KPH, knots, and m/s.
What you'll need
- • Any two of: distance, speed, time
How it works
- 1. Pick what you want to calculate.
- 2. Enter the two known values with their units.
- 3. View the third value with unit conversions.
Worked example
Driving 240 miles in 4 hours is an average speed of 60 MPH.
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Speed Calculator FAQ
What is the Speed Calculator?
The Speed Calculator is a free online tool that helps you calculate speed by dividing distance by travel time.
How do I use the Speed Calculator?
Open the Speed Calculator, enter the requested values, and review the instant estimate on the page.
Is the Speed Calculator free?
Yes. The Speed Calculator is free to use on Fast Online Calculator and does not require an account.
How do I convert MPH to KPH?
Multiply MPH by 1.609. So 60 MPH = 96.6 KPH.
Can it handle different units for time?
Yes, time can be entered in hours, minutes, or seconds.
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