Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Plumbing
Septic Tank Sizing Calculator
Estimates the minimum septic tank volume (in gallons) needed for a home based on bedroom count, occupants, plumbing fixtures, and daily wastewater generation. Use it when designing or permitting a new septic system.
Fill in the required fields to see your result.
Plumbing
Septic Tank Size Calculator
Estimates the minimum septic tank capacity needed for a household based on bedroom count and daily water usage. Use it when planning a new septic installation or verifying compliance with local health codes.
Fill in the required fields to see your result.
Key differences
| Septic Tank Sizing Calculator | Septic Tank Size Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 4 | 2 |
| Result | Minimum Tank Size (gallons) | Required Tank Size (gallons) |
| What it does | Estimates the minimum septic tank volume (in gallons) needed for a home based on bedroom count, occupants, plumbing fixtures, and daily wastewater generation. Use it when designing or permitting a new septic system. | Estimates the minimum septic tank capacity needed for a household based on bedroom count and daily water usage. Use it when planning a new septic installation or verifying compliance with local health codes. |