Speed Calculator
Enter any two values — the third will be calculated automatically.
About This Speed Calculator
This calculator solves for any one of speed, distance, or time when the other two are known. Enter two values, leave the third blank, and the result appears instantly. Select your preferred units from the dropdowns.
Frequently Asked Questions
How do I calculate how long a trip will take?
Enter your speed and distance, leave time blank, and the calculator computes travel time. For example, 300 km at 100 km/h = 3 hours.
How many km/h is 60 mph?
60 mph ≈ 96.56 km/h. To convert mph to km/h, multiply by 1.60934. You can also use the Unit Converter tool on this site.
What is the difference between speed and velocity?
Speed is a scalar quantity — it measures how fast something moves without direction. Velocity is a vector — it has both speed and direction. This calculator works with speed (magnitude only).
Formula
Speed = Distance / Time
Distance = Speed × Time
Time = Distance / Speed
Distance = Speed × Time
Time = Distance / Speed