Water Tank Size Calculator How Many m³ Do You Need?

How to size a water tank yourself

The formula is simple people × daily use per person × days of storage. Saudi households typically use 200 to 300 litres per person per day; we use 250 litres as the average.

Example a home of 6 people wanting a week of storage 6 × 250 × 7 = 10,500 litres, about 10.5 m³, a 14 m³ tank is the right fit.

Tips before you choose

• If you get frequent water cuts or rely on water trucks, go one size up.
• Add to daily use if you have a garden, pool or staff.
• For buildings, count every resident; we can install multiple tanks, see building tanks.
• Measure your available space and compare it with the dimensions on the sizes page.

Results are estimates. For buildings and large projects, contact us for a free, precise calculation.