How do you calculate the braking distance? | iKörkort.nu
Stäng
HOME
LOG IN
SIGN UP
THE LICENCE GAME
THE ROAD TO YOUR LICENCE
LICENCE THEORY
FREE TEST
ROAD SIGNS
FIND A TRAFFIC SCHOOL
LANGUAGE

Common theory questions

How do you calculate the braking distance?

The simplest formula for calculating the braking distance is ((v/10)^2)/2 where v is the car's speed in km/h. In words, the formula is: speed divided by ten – to the power of two – divided by two.

This is how you calculate the braking distance at 30 km/h using the formula: ((30/10)^2)/2 = 4.5.

You do not need to know the formula to pass the theory test. But you need to know the approximate braking distances at different speeds.

Braking distances in ideal conditions:

  • 30 km/h: 4.5 metres
  • 50 km/h: 12.5 metres
  • 70 km/h: 24.5 metres
  • 90 km/h: 40.5 metres
  • 110 km/h: 60.5 metres

If the braking occurs in other than ideal conditions, the braking distance can be many times greater.