Originally Posted by Chairman Cheyco
Or you can download it here.
There is a problem with this spread sheet, but it is easily fixed. The math on the column for "height cm" which is #4 needs adjusting. If you click on the the box at ROW 4, COLUMN 4 the formula will appear:
this needs to be mulyiplied by 2, so that the formula will be:
You will need to do the same to all the boxes down column 4, but no where else.