[QUOTE] Can't resist trying to get this down right this time. The volume of a cylinder is Pi times r-sqaured times height right? So to calculate this in cubic metres 22/7 * (0.65/2) * (0.65/2) * 1.4 = 0.465 cubic metres. Then all you need to know is how many litres are in a cubic metre? [/QUOTE] 1000 litres to the cubic metre. ergo 465 litres. Bollocks that's right. I confused Pi R squared (area) wih Pi D (circumference) Sorry Champ!