If you need to convert between different measurement systems Excel has just the function for you, called CONVERT.
In the image below there are some examples using common conversions.
Syntax
CONVERT(number, from_unit, to_unit)
number – a value or a link to a cell that has a value to be converted.
from_unit – the text code the represents the unit to converts from. If entered in the formula the text must be enclosed in quotation marks. You can link to a cell with the text in it as per the examples above.
to_unit – the text code the represents the unit to convert to. If entered in the formula the text must be enclosed in quotation marks. You can link to a cell with the text in it as per the examples
If you try to convert measures that are in a different measurement group an #N/A error is displayed eg kg (kilograms) to in (inches).
In the example, which you can download at the button below, I have included lists of the different groups of codes you can use for each measure.
Note: some measures have separate codes for liquid (oz = fluid ounce) and mass (ozm = weight).