Septic Tank Sizing Calculator

Calculate septic tank and drain field size based on bedrooms, soil type, and usage

Input Parameters

Results

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Min Tank Size
gal
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Drain Field Length
ft
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Drain Field Area
sq ft
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Daily Flow
gpd

Reference

Tank: 1000 gal (1-3 BR), 1200 (4 BR), 1500 (5+ BR) Application rate based on perc: <15 min=0.8, 15-30=0.6, 30-60=0.4 gpd/sf