The Speed, Distance & Time Triangle
The relationship between speed, distance and time is one of the most fundamental in physics and everyday life. The three variables are linked by these formulas:
Three Core FormulasSpeed = Distance ÷ Time
Distance = Speed × Time
Time = Distance ÷ Speed
Example: 150 km at 60 km/h → Time = 150 ÷ 60 = 2.5 hours
Distance = Speed × Time
Time = Distance ÷ Speed
Example: 150 km at 60 km/h → Time = 150 ÷ 60 = 2.5 hours
Unit Conversions for Speed
| Speed | km/h | m/s | mph |
|---|---|---|---|
| Walking pace | 5 km/h | 1.39 m/s | 3.1 mph |
| Cycling | 20 km/h | 5.56 m/s | 12.4 mph |
| City road limit | 50 km/h | 13.9 m/s | 31.1 mph |
| Highway limit | 100 km/h | 27.8 m/s | 62.1 mph |
| Train (Vande Bharat) | 160 km/h | 44.4 m/s | 99.4 mph |
Practical Uses
- Road trips: How long will it take to drive 450 km at 80 km/h? → 5.625 hours
- Fitness: You ran 5 km in 28 minutes — what was your pace? → 10.7 km/h
- Train/flight: A 2,000 km flight takes 2.5 hours — what speed? → 800 km/h
- Physics problems: Solve kinematic equations for school and competitive exams
Frequently Asked Questions
Speed is distance divided by time. Enter the distance traveled and the duration, and the tool will calculate average speed.
Yes. The calculator solves for any missing variable among speed, distance, and time.
We support kilometers (km), miles (mi), meters (m), hours (hr), minutes (min), and seconds (sec) for conversion.
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