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.

**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.