The formula for calculating the volume of liquid in the tank is given by:

Where | V = | volume of liquid |

D = | Diameter of the tank | |

L = | Length of the tank | |

and, | H = | Depth of the liquid |

The calculation can be done manually but would take some time as it is quite complicated. This calculation can be done in an instant through a small computer program. It can be useful for finding out the quantity of liquid in a cylindrical tank lying horizontally in some inaccessible location, say, underground, as in the case of a gas (petrol) station. You can download the file named