iHow it is calculated
The relation between speed, distance and time is fundamental. Knowing two values, you find the third:
v = d ÷ t · d = v × t · t = d ÷ v
At 300 km and 90 km/h, time = 300 ÷ 90 = 3.33 hours, that is 3 hours and 20 minutes.
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Auto & Travel · Updated 2026
Speed, Distance & Time Calculator
Calculate average speed, travel time or distance covered from the other two values, with the fundamental formula of motion.
Choose what to find
km/h
km
Pick the unknown, then enter the other two values. Speed in km/h, distance in km, time in hours.
=Time
3.3h
3 h 20 min
Speed90 km/h
Distance300 km
Time3.33 h
v = d ÷ t
Time = 3.33 h (3 h 20 min)Quick calculations for drivers. Standard formulas for consumption, cost and speed. Instant in-browser calculation, no account, no data sent. Fuel prices are indicative.
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?Frequently asked questions
What is the formula for speed, time and distance?
Speed = distance ÷ time. The others follow: distance = speed × time, and time = distance ÷ speed. It is the fundamental relation of uniform motion.
How long does a trip take at a given speed?
Divide distance by speed. For example, 300 km at 90 km/h = 300 ÷ 90 = 3.33 hours, that is 3 hours and 20 minutes.
What distance do I cover in a given time?
Multiply speed by time. For example, 90 km/h for 2.5 hours = 90 × 2.5 = 225 km.
How do I calculate average speed?
Divide total distance by total time. If you covered 240 km in 3 hours, the average speed is 240 ÷ 3 = 80 km/h, regardless of variations along the way.
How do I convert decimal hours to hours and minutes?
The whole part is the hours, and the decimal part times 60 gives the minutes. For example, 3.33 hours = 3 hours + 0.33 × 60 ≈ 20 minutes.
How do I convert km/h to m/s?
Divide by 3.6. For example, 90 km/h ÷ 3.6 = 25 m/s. Conversely, multiply m/s by 3.6 to get km/h.
Does the calculator account for stops and traffic?
No, it assumes constant speed (uniform motion). For a real trip, add extra time for stops, traffic and breaks.
How do I estimate my arrival time?
Calculate the travel time (distance ÷ speed) and add it to your departure time, plus a margin for breaks. On long trips, a 15-minute break every 2 hours is recommended.
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