Drainfield Sizing Calculator

Calculate septic drainfield area requirements.

Rate of fluid movement through the system.
GPD
The speed or frequency at which something occurs.
min/in
Horizontal measurement perpendicular to length.
in
Measurement of how deep something extends.
in

Results

Application Rate:
Calculated application rate based on your inputs.
-gpd/ft²
Bottom Area:
Sum of all calculated values.
-ft²
Trench Length:
Calculated trench length based on your inputs.
-ft
Reference: AWWA/EPA Standards. State septic codes.