YAJU Field Tools

Water Storage & Tank Sizing Calculator

Estimate storage for rainwater harvesting, borehole and pumping systems, irrigation demand, or calculate physical tank capacity.

Design inputs

Catchment / roof area

m²

Annual rainfall

Runoff coefficient

Number of users

people

Water demand per person

L/p/d

Dry period

days

Storage safety allowance

Engineering note: This calculator provides preliminary sizing estimates. Final tank and water-supply design should use site-specific rainfall, demand, source-yield, operating-pattern, crop and hydraulic data and should be checked against applicable engineering standards.