🚽 Septic Tank Calculator PRO
Estimate septic tank size, drain field area, pipe length, and total installation cost.
Dimension Diagram — updates as you type
Two-chamber tank section. Bedroom count sets the code minimum; daily load sets the working size.
1 Property Details
Code standard: 150 gal per bedroom. Typical usage: 50-100 gal/person/day.
2 Tank Configuration
Results
Tank Sizing (Code-Based)
Tank Dimensions
Drain Field
Cost Breakdown
⚠️ Pre-Export Checklist
- Local health department requirements confirmed
- Percolation test completed by certified tester
- Soil type verified with on-site evaluation
- Setback distances from property line/well verified
- Groundwater level assessed
- Building permit application prepared
- Contractor bids obtained (minimum 3)
Professional Septic Sizing Guide
📐 Formulas & Code Standards ▼
Tank Sizing (IRC/IPC Standard)
Minimum Tank = Bedrooms × 150 gallons
Actual Tank = Max(Code Minimum, Daily Usage × 2-day retention)
Code requires minimum 2-day retention time. Tank must handle peak daily flow.
Drain Field
Absorption Area = Tank Size ÷ 2 (sqft per bedroom)
Adjustment: Clay = ×2, Loam = ×1, Sandy = ×0.75
Soil percolation rate determines field size. Clay soils need significantly more area.
💡 Pro Tips ▼
- Pump every 3-5 years to prevent solids from entering drain field.
- Avoid planting trees near drain field — root intrusion is a leading cause of failure.
- Water conservation reduces system load and extends drain field life.
- Keep records of maintenance, pumping, and inspections for property resale.
- Alternative systems (mound, aerobic) may be required in high water table areas.
Drag to rotate — Scroll to zoom
Kalkulator Terkait
Frequently used together on the same project.
Client & Quote (prints on PDF & Excel)
Adjustments (applies to exports)
Contingency is added as a separate line on the exported cost summary. Waste % is printed as an advisory reminder.
Project notes (prints on PDF & Excel)
Result compare (A/B)
| Item | Pinned | Current | Change |
|---|---|---|---|
Saved rates auto-apply from your Price Library. Advanced details stay in your browser — nothing is uploaded except inside your own PDF/Excel exports.
📖 Cara Menggunakan Kalkulator Septik
Masukkan jumlah kamar tidur.
Pilih laju infiltrasi tanah.
Pilih jenis material tangki.
Masukkan biaya lokal.
Klik Hitung.
Tinjau rincian biaya.
📐 Rumus Desain Septik
⚠️ Kesalahan Desain Umum
Memasang tangki yang terlalu kecil.
Tidak memperhitungkan penambahan masa depan.
Menempatkan lapangan terlalu dekat.
Mengabaikan hasil uji tanah.
Melewatkan izin dan inspeksi.
💡 Tips Profesional
Lakukan uji tanah sebelum desain.
Pertimbangkan langkah hemat air.
Gunakan kontraktor berlisensi.
Pasang akses manhole.
Simpan catatan terperinci.
Jangan tanam pohon di atas lapangan.
Inspeksi tahunan dan pompa setiap 3-5 tahun.
❓ Pertanyaan yang Sering Diajukan
Kebanyakan tangki septik harus dipompa setiap 3 hingga 5 tahun. Keluarga empat orang biasanya membutuhkan pemompaan setiap 3 hingga 4 tahun.
Tergantung jumlah kamar tidur. Dua kamar membutuhkan 750-1000 galon. Tiga 1000 galon. Empat 1000-1500 galon.
Sistem dasar Rp45 juta-Rp120 juta. Sistem lanjutan Rp150 juta-Rp375 juta atau lebih.
Tidak, tidak boleh membangun struktur di atas lapangan pembuangan.
Tanda-tanda termasuk drainase lambat, bau, titik basah, dan rumput hijau di atas lapangan.
🏗️ Instalasi Nyata
Gunakan kalkulator septik kami untuk menentukan ukuran tangki, lapangan pembuangan, dan biaya yang diperkirakan.
✅Method, Sources & Review
Maintained by theBuildingCalc methods desk· Last reviewedSeptember 23, 2026. This calculator implements the standards and references below; every figure can be rechecked against the formulas and worked example on this page.
Results are estimates, not engineering advice. Verify against local codes and licensed professionals for structural, electrical, and gas work. See ourTerms. Spotted an error? Report it— corrections ship with the next review.