EASY Dry Well Calculator

Step 1:

Enter the Square Feet of Drainage Area 1 (Ex: Roof): This field is required.

Enter the Square Feet of Drainage Area 2 (Ex: Grass): This field is required.

Choose the Coefficient of Runoff for Area 1: Please select an option.

Choose the Coefficient of Runoff for Area 2: Please select an option.

Enter the thicknes of gravel beneath the dry well (Dim A) (ft): This field is required.

Enter the thickness of gravel around the dry well (Dim B) (ft): This field is required.

Press the Calculate button for results:

Runoff:

0
0

Volume of water to be stored:

0
0

# of Drywell Needed:

*Changing amount of gravel on steps 3 & 4 will change the number of units required for the project