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First-pass estimate — confirm final quantities against your engineer's design.
Recommended capacity
1600litres
Length
1.5m
Width
0.75m
Depth (liquid)
1.5m
Live estimate · Prices indicative for Guna district (2026)
Key points
- Capacity ≈ 130 L per person per year of desilting + 20 L/person daily sewage × 3 days retention.
- Depth kept ≥ 1.5 m; length ≈ 2× width.
Formula & how it works
Capacity (L) = persons × 130 × years + persons × 20 × 3.
Assume depth 1.5 m and L = 2×W to solve for W.
Worked example
- 5 persons, 2-year desilting → 1,600 L. Suggested ≈ 1.5 × 0.75 × 1.5 m.
Expert tips & mistakes to avoid
- Always add a 5–7% wastage buffer — mid-slab shortages cost more than the buffer bags.
- For engineered members (RCC columns/beams), follow the structural drawing over any calculator.
- Order cement in tranches — bags older than 90 days lose strength.
- Confirm the current market rate on WhatsApp before finalising the budget — prices printed here are indicative only.
Frequently asked questions
Is one chamber enough?
+
Two-chamber tanks perform noticeably better and are recommended by IS 2470.
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