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Home » Uncategorized » Converting speed from KM/U to meters/second

# Converting speed from KM/U to meters/second

Feb 6, 2015

To know how many meters you travel per second, multiply the speed by 1000. You then have the number of meters per hour. 1 hour has 3600 seconds. Divide the result by 3600 and you know how many meters you travel per second. Formula: Meters per Second =Speed*1000/3600.

It can also be even simpler!

Divide the speed by 4. To this result add 10 percent of this result. The outcome is not exactly the same,but you are not too far off.

Example: you are driving 100 km/h. 100/4 = 25. Then you take 10 percent of 25, which is 2.5. You add up the 2 outcomes: 25 + 2.5 = 27.5 meters per second.

The chart below lists different speeds in km/h.

2nd column: rounded the exact speed.

3rd column: the speed according to the simple calculation.

4th column: the minimum tracking distance of 2 seconds.

5th column: average Reaction Road. This assumes 1 second of driver startle response.

6th column: Average braking distance on a dry road surface.

7th column: average braking distance on a wet road surface.

8th column: stopping distance on a dry road surface.

9th column: stopping distance on a wet road surface.

The following constants were used in all calculations:

Average braking deceleration: 7.5 m/s2

Clearance coefficient dry road surface: 1.0