Calculate volume, capacity in litres & gallons, number of people served — for all tank shapes used in Pakistan.
🏗️ Civil Construction Guide — By Engr. Muhammad Bilal
Select Tank Shape
🟦
Rectangular
⬜
Square
🔵
Cylindrical
⭕
Circular Sump
📐
L-Shape
🏗️
Overhead Tank
persons
litres
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Volume Results
📦
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Volume (CFT)
🔵
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Volume (m³)
💧
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Capacity (Litres)
🪣
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Capacity (Gallons)
👨👩👧👦
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Days Water Supply
🏠
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Persons Served/Day
📐 Formula Used
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Complete Calculation Breakdown
Description
Value
💡 Note: 1 CFT = 28.317 Litres = 7.481 US Gallons. Average water use per person = 150 litres/day (Pakistan standard). Overhead tank: add 20% extra capacity for reserve.