ConstructionLong-Tail Solution Page

Concrete Calculator for 8x8 Slab (4" Depth)

For a 8' x 8' slab with 4" depth, you need 0.79 cubic yards of ready-mix concrete.

Concrete Calculator

Calculate cubic yards, cubic feet, and 60lb/80lb premixed bags.

Length (Feet)

Width (Feet)

Depth (Inches)

Cubic Yards

0.79 yd³

Cubic Feet

21.3 ft³

Premix Bags

~36 80lb / ~48 60lb

Volume = 8 x 8 x (4/12) = 21.3 cubic feet. Cubic Yards = 21.3 / 27 = 0.79 yards. 80lb Bags = 36 bags.

You will need approximately 36 bags of 80lb premixed concrete.

Open the full interactive Concrete Calculator tool.