calculator | Septic Tank Pro

Septic Tank Size Calculator: Estimate Tank Size by Bedrooms

October 17, 2026November 23, 2021 by septictadmin

Updated October 2026. Calculations use the Washington and Minnesota septic tank rules as examples; your local health department sets the size for your home. Septic tanks are sized by the number of bedrooms. Most homes with up to 3 bedrooms need at least a 1,000 gallon tank, and larger homes need 1,250 to 2,000 gallons … Read more

Disclosure:

By submitting your contact information, you understand and agree that you may be contacted by up to four independent service providers and/or partners regarding your home service request, using email, telephone or text messaging-including through auto-dialed and/or prerecorded calls or messages- to the telephone number provided above, which may include your mobile telephone number, if provided. You understand that consent is not a condition of purchase. Please note that this website connects consumers looking for septic services with a network of independent service providers. It does not provide direct home repair or maintenance services.

“This site is owned and operated by FB Global Value LLC, a limited liability company headquartered in New Jersey, USA. FB Global Value is a participant in the Amazon Services LLC Associates Program, as an Amazon Associate, I earn from Qualifying Purchases. FB Global Value LLC also participates in affiliate programs with Bluehost, Clickbank, CJ, ShareASale, and other sites. Sites like Self Publishing Hub which are owned and operated by FB Global Value LLC are compensated for referring traffic and business to these companies.”