Deck Footing Calculator
Sum of πr²h across identical holes.
Step 1: Units
Step 2
Enter project measurements
Use decimals if needed (e.g. 3.5).
Step 3
How to use this calculator
Hole diameter, depth below grade to bottom of footing, and number of holes.
What the math is doing
Cylinder volume × count with waste.
Frequently asked questions
Bell shape?
Not modeled.
Code frost?
Depth per jurisdiction.
Post anchor?
Hardware separate.
Inspection?
Call before pour.