Speed, Distance & Time Calculator
Solve for any variable in the classic motion triangle: enter any two values to find the third. Perfect for road trips, running splits, cycling, aviation, and physics homework.
Hoe het werkt
Formule
Speed = Distance / Time | Distance = Speed × Time | Time = Distance / Speed Praktijkvoorbeeld
Driving 150 miles in 2 hours and 30 minutes results in an average speed of 60 mph (96.56 km/h or 26.82 m/s).
The Speed-Distance-Time Triangle
The relationship between speed, distance, and time forms the bedrock of classical kinematics. Known as the motion triangle, knowing any two variables allows you to compute the third:
$$\begin{aligned} \text{Speed } (v) &= \frac{d}{t} \ \text{Distance } (d) &= v \times t \ \text{Time } (t) &= \frac{d}{v} \end{aligned}$$
Speed Units Conversion Reference
| Unit | Equivalent in km/h | Equivalent in mph | Equivalent in m/s |
|---|---|---|---|
| 1 km/h | 1.0000 | 0.6214 | 0.2778 |
| 1 mph | 1.6093 | 1.0000 | 0.4470 |
| 1 m/s | 3.6000 | 2.2369 | 1.0000 |
| 1 Knot (kn) | 1.8520 | 1.1508 | 0.5144 |
Running & Cycling Pace Conversion
Athletes commonly measure performance in pace (time per unit distance) rather than speed (distance per unit time):
- Minutes per Kilometer: $\text{Pace } (\text{min/km}) = \frac{60}{\text{Speed } (\text{km/h})}$
- Minutes per Mile: $\text{Pace } (\text{min/mi}) = \frac{60}{\text{Speed } (\text{mph})}$
Example: A runner aiming for a sub-4 hour marathon must maintain an average speed of at least $10.55\text{ km/h}$ ($6.56\text{ mph}$), which corresponds to a steady pace of $5:41\text{ min/km}$ or $9:09\text{ min/mile}$.
Veelgestelde vragen
How do I calculate average speed?
Divide the total distance traveled by the total elapsed time taken: Speed = Total Distance / Total Time. Be sure to convert time into decimal hours first (e.g., 2 hours 15 minutes = 2.25 hours).
How do I convert speed (mph or km/h) to running pace (min/mile or min/km)?
Pace is the inverse of speed. To get minutes per mile from mph: Pace (min/mi) = 60 / Speed (mph). For example, running at 7.5 mph equals an 8:00 min/mile pace.
How do I convert km/h to mph and m/s?
1 km/h = 0.621371 mph. 1 mph = 1.60934 km/h. To convert km/h to meters per second (m/s), divide by 3.6 (e.g. 72 km/h ÷ 3.6 = 20 m/s).
What is a knot in speed measurement?
A knot is one nautical mile per hour (exactly 1.852 km/h or approximately 1.15078 mph), standard in maritime navigation and aviation.