You would typically use the metric unit "kilometers" to measure the distance from home to school.
You would use the unit "meter" in the metric system to measure the distance from point A to point B.
You can use a measuring tape or a laser measuring device to measure the distance to the door in metric units, such as meters or centimeters. Simply extend the measuring tool from your starting point to the door to determine the distance.
The distance between towns is commonly measured in miles or kilometers.
the measurer
Meters
distance
A global positioning system (GPS)
I would assume that you would use cm or even mm if you wanted to be more accurate
A metric ruler.
You would typically use the metric unit "kilometers" to measure the distance from home to school.
Kilometers
kilometers
meters
You would use the unit "meter" in the metric system to measure the distance from point A to point B.
Metres (in a built-up area), kilometres if across open spaces.
Miles is best.