Speed, Distance and Time Calculator
Know two of speed, distance and time? Get the third. Plan a motorway trip or check a physics answer.
Updated
Formula
Speed = Distance ÷ Time
Distance = Speed × Time
Time = Distance ÷ Speed
Keep units consistent — kilometres with km/h, or miles with mph.
Examples
Lahore → Islamabad, 380 km at 100 km/h
380 km at 100 km/h takes 3 h 48 min
Karachi → Hyderabad 165 km in 2 h 15 min
165 km in 2 h 15 min = 73.33 km/h
80 km/h for 3 hours
80 km/h for 3 h 0 min = 240 km
Important information
- Real journeys include stops and traffic — add 10–20% to the calculated time for road trips.
Frequently asked questions
How do I calculate travel time?
Divide distance by speed. 300 km at 100 km/h takes 3 hours.
How do I calculate average speed?
Total distance divided by total time, including stops.
What is the speed triangle?
A memory aid with D on top and S × T below: cover the one you want to find.
Learn more
- Petrol Cost per Km: Plan Any Trip's Fuel Bill — How to find your car's real fuel average, work out petrol cost per kilometre and estimate the fuel bill for trips like Lahore to Islamabad.
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