![]() Multiply the length of the short side by itself. Times this answer by two, add to your previous answer, and record. Multiply the length of the long side by the length of the short side. ![]() Multiply the length of the long side by itself, record the answer. For curve-fronted corner tanks, see the section on curves. You do not need the length of the front pane. To determine the surface area of a corner tank you need to know the lengths of the long sides (L), which will be equal, and of the short sides (X). Subtract this number from your previous answer, then divide by two to get the surface area. Mulitply the length of the front pane by the length of the end pane. Add these three numbers together, record. Multiply the length of the tank by the length of the end pane and record. Multiply the width of the tank by the length of the front pane and record. Ie: Multiply the width of the tank by its length and record the answer. To determine the surface area of a D-shaped tank you need to know its length (L), its width (W), the length of the front pane (X), and the length of the side or end pane (Y). Or simply follow the instructions as above. However, this does not make the resulting maths much easier! The new equation is: Subtract this number from your previous answer, then divide by two to get the surface area.įor a round octagonal the length of the side and front panes will be equal (ie Y=X). ![]() To determine the surface area of an octagonal tank you need to know its length (L), its width (W), the length of the front pane (X), and the length of the side or end pane (Y). Multiply the width of the tank by the length of the front pane and add this to the first number. To determine the surface area of a hexagonal tank you need to know its length (L), its width (W), and the length of the front pane (X). A hexagonal tank has six sides (as per the diagram below) while an octagonal has eight. The surface area of a rectangle is simply its length (L) multiplied by its width (W):ĭo not confuse hexagonal tanks (which are fairly rare) with octagonal (which are more common). Measure the dimensions of your tank in either cm or inches, apply the necessary formula or calculations, then use this conversion guide to convert to liters or gallons. You can even write the volume onto an inconspicuous part of the tank with a water-proof marker so that it is always there when you need it. Some of the calculations are lengthy, so once you have determined the surface area and/or volume of your tank, it is a good idea to record it somewhere safe. There are some maths involved, and formulae are provided for those who are not scared by them, but in most cases, instructions are given in plain English as well. The following section explains how to calculate the surface area (and hence volume) for a range of differently shaped tanks: Rectangular, hexagonal, octagonal, D-shaped (also called half octagonal), corner, and curves. The rare exception to this is a tank with a sloping front, which is not dealt with here. It is usually a simple matter, once either surface area or volume is known, to calculate the other, since volume is equal to the surface area multiplied by the depth (and conversely: surface area = volume divided by depth). The volume and surface area of a tank are both important things to know.
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