Observed arrival · 2026-09-13
Septic Tank Calculator
A free planning calculator that estimates septic tank capacity and drainfield area from bedrooms, occupants, jurisdiction, and soil perc rate.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
The tool accepts bedroom count, occupants, jurisdiction, and one of eight soil or perc-rate bands. Its displayed example turns three bedrooms and loam soil into a 1,000-gallon tank, 600 square feet of drainfield, 360 gallons per day, and two 100-foot trenches. It also estimates a 3.7-year pumping interval and lets users copy or print a spec sheet. The page distinguishes preliminary sizing from local enforcement and actual soil testing.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue