Estimating Sheet

# How to calculate the quantity & size of a rectangular tank

Construction Software

In this construction video tutorial, you will learn how to work out the size and capacity of a water tank with rectangular or square shape.

With the following formula, we can find out volume of tank

Volume of tank = Length x Breadth x Height

Length is taken as = 12 feet; breadth is taken 8 feet; height is taken as 6 feet

So, volume of tank = 12 x 8 x 6 = 576 cubic feet

You can find out quantity of water in 1 cuft in the following ways :-

Density of water = 1000 kg/cum
1 cum = 1000 litres (1000 kg)
1 cum = 35.3198 cuft
Therefore, the quantity of water in 1 cuft = 1000/35.3198 = 28.31 litres
Therefore, weight of water = 576 x 28.31 = 16307 litres = 16307 kg

When the dimension is provided in meter, multiply volume with 1000 to get the amount in liters.

With adherence to IS code, 135 litres is required for each person each day. Split of the IS assumptions :-

Drinking – 5 litres
Cooking – 5 litres
Bathing & Toilet – 85 litres
Washing Clothes & Utensils – 30 litres
Cleaning House – 10 litres