Speed, Distance, Time Calculator
Calculate speed, distance, or time from the other two values
Calculator
v = d / t = 100 km / 1h 40m 0s = 60.00 km/h
Formulas
- Speed = Distance / Time
- Distance = Speed × Time
- Time = Distance / Speed
How to Use
Calculate speed, distance, or time from the other two values
Select calculation
Choose what you want to calculate: speed, distance, or time
Enter known values
Input the two values you know with their units
View result
See the calculated value in multiple unit formats
Speed Formula
Speed = Distance / Time
Speed is the rate of distance covered per unit time.
Frequently Asked Questions
The three formulas are: Speed = Distance / Time, Distance = Speed x Time, and Time = Distance / Speed. These are fundamental kinematics equations used in physics, travel planning, and everyday calculations like estimating arrival times.
Divide total distance by total time. If you drove 150 miles in 3 hours, your average speed was 50 mph. Note that average speed differs from instantaneous speed - you may have gone faster or slower at different points.
Keep units consistent! If using kilometers for distance, use hours for time to get km/h, or seconds to get m/s. Our calculator handles unit conversions automatically - just select your preferred input and output units.
Conversion factors: 1 mph is approximately 1.609 km/h or 0.447 m/s. To convert mph to km/h, multiply by 1.609. To convert km/h to m/s, divide by 3.6. Our calculator does these conversions automatically.