Rectangles and Squares
Circles
Irregular shapes
Example of "counting squares" method of approximately calculating the area of an irregular shape. For irregular shapes, calculating the area is less accurate. You will need to draw up the pool accurately to scale on graph paper using a square on the paper to represent a meter (or foot) square of pool. When you have finished, count the squares. For partial squares, count anything over half as one and ignore any under a half. When you have the area (A) multiply by depth (D) for the Volume in cubic metres. If you have several depths, break up your area calculation for each depth.
Conversion into different units You can easily convert units using the this calculator
(Results are rounded to 4 decimal places)
cubic metres to litres - Multiply by 1000 cubic metres: litres: