In this article, we will discuss how to calculate water tank capacity in liters.

**Water **is essential in human life as well as for other living organisms. Water needs to be stored in a tank to fulfil the requirement of water demand.

There is a need for water tanks in residential, commercial, and industrial buildings, restaurants, hotels, hostels, and others for numerous objectives like drinking, cooking, bathing and toilet, washing clothes, utensil cleaning, house cleaning, and other domestic purposes.

For multi-story buildings, apartments, commercial, and industrial buildings there is a detailed design and plan of the water tank facility to supply water in the building with the design plan of the building, so there is no requirement to estimate water tank capacity.

In normal residential buildings in remote cities and in rural areas, if the plan of water tank is not given with the plan of the building, there is a requirement for the construction of a water tank in the building for supplying a water facility for users and who like to make own shapes like **cylindrical **and rectangular water tank according to water demand in their building for family members. They like to know how to calculate water tank capacity in litres.

** 1. How To Calculate Water Demand in Liters **

**So, here is the answer.**

As per Indian standard, there is a necessity of around 135 litres of **water demand** per head per day for domestic purposes, about 5 litres of water needed for drinking, 5 litres is utilized for cooking, 85 litres is utilized for bathing and toilet, 30 litres is utilized for washing cloth and 10 litres is utilized for cleaning house.

**About 135 litres of water are needed per day per person, so if a family consist of 4**

= 135×4

= 540 litres,

You will need about 540 litres of water per day for 4 family members.

**for 8 users,**

135×8= 1080 litres,

You will need around 1080 litres of water.

**for 10 users,**

135×10= 1350 litres,

You will need about 1350 litres of water.

**for 20 users,**

135×20 = 2700 litres

You will need about 2700 litres of water.

**for 25 users,**

135 x 25 = 3375 litres

You will need about 3375 litres of water.

**for 50 users,**

135 x 50 = 6750 litres

you will need about 6750 litres of water,

**for 75 users,**

135 x 75 = 6750 litres

You will need about 10125 litres of water.

**for 100 users,**

135 x 100 = 13500 litres

You will need about 13500 litres of water.

** 2. How To Calculate Water Tank Capacity in Liters? **

There are two types of water tanks rectangular water tanks and cylindrical water tanks, calculating the volume of the water tank is equal to the capacity of the water tank to store water.

**How to calculate water tank capacity in Liters of Rectangular Section?**

**For Rectangular Water Tank,**

This is extremely easy, for rectangular water tank capacity, the total volume of a rectangular water tank is the same as the ability of a water tank to store water.

**Take,**

Length = 2m

Breadth= 1m

Height= 0.5m

**Volume= LxBxH**

= 2m × 1m × 0.5m

= 1m^{3}

You get the volume of the water tank it can store 1 cubic metre.

Now, multiply the answer by 1000 to convert it into a litre as,

= 1×1000

= 1000 litres

**The result 1000 is water tank capacity in litres.**

**How to calculate water tank capacity in Liters of Cylindrical Section?**

**For Cylindrical Water Tank**

For cylindrical water tank capacity total volume of cylindrical water tank is equal to the capacity to store water, total Volume of Cylinder shaped tank is the area A of circular end times the height H,

A= πR^{2}

where R is the radius which is equal to 1/2 of diameter or d/2,

Therefore the volume of Cylinder shaped water tank V tank = πR^{2} × H,

**Take,**

Diameter = 1.12m

height = 1m,

then R = 1.12/2 = 0.56m,

**The volume of the tank = πR ^{2} × H**

= 3.14 × 0.56 × 0.56 × 1

= 0.984m^{3},

Multiply the answer by 1000 as 0.984×1000= 9840 litres, the result 9840 is **water **tank capacity in litres.

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