The right tank size depends on your household size, your home type, and how reliable your water supply is. If you want a detailed litre-by-litre calculation based on daily consumption, we’ve covered that in a separate post — here, the focus is on quick, practical benchmarks you can use to narrow things down fast.
Quick Reference by Home Type
- 1 BHK apartment or studio (1–2 people): Typically 500–750 litres is enough for daily needs with a modest buffer.
- 2 BHK apartment (3–4 people): Often falls in the 750–1,000 litre range.
- 3 BHK independent house (4–6 people): Usually 1,000–1,500 litres, sometimes more depending on supply reliability.
- Larger independent houses or villas: 1,500–2,000 litres or more, particularly if there’s a garden, multiple bathrooms, or irregular municipal supply.
- Apartment complexes or commercial buildings: Typically 5,000 litres and upward, sized around total occupancy and peak demand.
Adjust for Water Supply Reliability
These benchmarks assume a reasonably consistent water supply. If your area experiences frequent supply interruptions or scheduled water timings, it’s worth sizing up to build in a few days of buffer rather than sizing purely for daily use.
Don’t Forget Physical Space
Roof load capacity, available floor space, or stand height can all constrain what size tank is practical to install, independent of what your household technically needs. It’s worth checking these constraints before settling on a size.
Still Not Sure?
These are general starting points, not hard rules — actual needs vary by household habits, number of bathrooms, and whether you use water-intensive appliances. If you’d like a more precise recommendation, share your household size and home type with our team and we can help you land on the right capacity.