How To Convert Feet to Kilometers - Example Problem

Worked Unit Conversion Example Problem

Converting feet to kilometers is something you can't see on a ruler. You need to learn how to calculate it.
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This example problem demonstrates how to convert feet to kilometers.

Feet To Kilometers Conversion Problem

The average commercial jet flies around an altitude of 32,500 feet. How high is this in kilometers?

Conversion Solution

1 foot = 0.3048 meters
1000 m = 1 km

Set up the conversion so the desired unit will be cancelled out. In this case, we want km to tbe the remaining unit.

distance in km = (distance in ft) x (0.3048 m/1 ft) x (1 km/1000 m)
distance in km = (32500 x 0.3048/1000) km
distance in km = 9.906 km

Answer

32,500 feet is equal to 9.906 kilometers.

Many conversion factors are difficult to remember. Feet to meters would fall into this category. An alternate method to perform this conversion is to use multiple easily remembered steps.

1 foot = 12 inches
1 inch = 2.54 centimeters
100 centimeters = 1 meter

Using these steps we can express a distance in meters from feet as:

distance in m = (distance in ft) x (12 in/1 ft) x (2.54 cm/1 in) x (1 m/100 cm)
distance in m = (distance in ft) x 0.3048 m/ft

Note this gives the same conversion factor as above. The only thing to watch out for is for the intermediate units to cancel out.

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