Volume of water requirement as per Indian Standards And Tank Size Calculations




As per IS Code – For 1 person daily 135 Litres of water is required per day

Details of IS consideration 

Drinking = 5 liters
Cooking = 5 liters
Washing cloth=30 liters
Cleaning house=10 liters
Bathing and Toilet=85 liters


Water tank size and capacity calculation
For a family of 4 persons.

Total water requirement 135 x 4= 650 liters per day

1m^3 = 1000 litres 
1 Liter = 1/1000 m^3
1 Litre = 0.001m^3
Our requirement is 650 Liters
650 x 0.001 m^3
Volume = 0.65m^3

Assume our water tank depth is 0.6 meters

Area Calculation 0.65/0.6 = 1.083 m^2
So Length x Breadth = 1.083 m^2
Assuming Length=2 Breadth 
2B x B = 1.083
B^2=1.083/2
B^2=0.54
B= √(0.54)
B= 0.734m

Hence L = 2B
            L = 2 x 0.734 
            L = 1.47 meter

For a 650 liter water tank
Length = 1.47 Meter
Breadth = 0.734 Meter
Depth = 0.6 Meter







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