Sanitation planning · Homeowners & designers
Estimate household septic tank volume from occupants, daily wastewater, retention days and freeboard—then see a practical chamber split for planning (not a municipal design).
Your estimate
A household septic capacity planner from occupancy, retention and sludge storage—not a municipal design.
3 days
2 year desludge cycle
2.54 m³
Sizing rules vary by local authority, soil percolation, soak pit / drain field design and building type. Confirm with a licensed plumber or engineer and applicable Nepal codes before construction.
Related planning
Pair with the water tank size calculator for supply-side storage, and keep effluent disposal (soak pit / field) as a separate design item.
Practical guide
Read the related guide for assumptions, ordering tips and ways to compare the estimate with actual site records.
Same-category tools first so each intent stays clustered—then open the full hub if you need a different job.
Frequently asked questions
Yes. The Septic Tank Size works in your browser without an account. You can install GharNaksa when you want to track the real project costs, payments and progress.
No. It is a planning estimate based on the information you enter. Verify rates, quantities, drawings, local requirements and contract terms with the appropriate qualified professional before making a commitment.
Use GharNaksa to record actual material deliveries, labor, payments, bills and site photos. Comparing the estimate with a dated site record helps reveal cost differences early.