Concrete Calculator

Separate tools for common pours: slabs/walls, holes & columns, circular slabs/tubes, curb & gutter, and stairs. Enter dimensions, set waste %, and calculate volume, yards, and bag counts.

Global Settings

Waste factor (%)

Ready-mix price per cubic yard ($)

Delivery fee ($, optional)

40 lb bag price ($)

60 lb bag price ($)

80 lb bag price ($)

Bag yields used: 40 lb ≈ 0.30 ft³, 60 lb ≈ 0.45 ft³, 80 lb ≈ 0.60 ft³. Adjust in code if your supplier differs.

Slabs, Square Footings, or Walls

Length (l)

feetinchesyardsmeterscentimeters

Width (w)

feetinchesyardsmeterscentimeters

Thickness or Height (h)

feetinchesyardsmeterscentimeters

Quantity

Calculate Clear

Volume (ft³)

—

Volume (yd³)

—

Waste included

—

Bag Size	Yield (ft³/bag)	Bags Needed	Cost
40 lb	0.30	—	—
60 lb	0.45	—	—
80 lb	0.60	—	—

Bag yields are estimates; verify with your supplier.

Hole, Column, or Round Footings

Diameter (d)

feetinchesyardsmeterscentimeters

Depth or Height (h)

feetinchesyardsmeterscentimeters

Quantity

Calculate Clear

Volume (ft³)

—

Volume (yd³)

—

Waste included

—

Bag Size	Yield (ft³/bag)	Bags Needed	Cost
40 lb	0.30	—	—
60 lb	0.45	—	—
80 lb	0.60	—	—

Bag yields are estimates; verify with your supplier.

Circular Slab or Tube

Outer Diameter (d₁)

feetinchesyardsmeterscentimeters

Inner Diameter (d₂)

feetinchesyardsmeterscentimeters

Length or Height (h)

feetinchesyardsmeterscentimeters

Quantity

Calculate Clear

Volume (ft³)

—

Volume (yd³)

—

Waste included

—

Bag Size	Yield (ft³/bag)	Bags Needed	Cost
40 lb	0.30	—	—
60 lb	0.45	—	—
80 lb	0.60	—	—

Bag yields are estimates; verify with your supplier.

Curb and Gutter Barrier

Curb Depth

feetinchesyardsmeterscentimeters

Gutter Width

feetinchesyardsmeterscentimeters

Curb Height

feetinchesyardsmeterscentimeters

Flag Thickness

feetinchesyardsmeterscentimeters

Length

feetinchesyardsmeterscentimeters

Quantity

Calculate Clear

Volume (ft³)

—

Volume (yd³)

—

Waste included

—

Bag Size	Yield (ft³/bag)	Bags Needed	Cost
40 lb	0.30	—	—
60 lb	0.45	—	—
80 lb	0.60	—	—

Bag yields are estimates; verify with your supplier.

Stairs

Run (per step)

feetinchesyardsmeterscentimeters

Rise (per step)

feetinchesyardsmeterscentimeters

Width

feetinchesyardsmeterscentimeters

Platform Depth

feetinchesyardsmeterscentimeters

Number of Steps

Quantity

Calculate Clear

Volume (ft³)

—

Volume (yd³)

—

Waste included

—

Bag Size	Yield (ft³/bag)	Bags Needed	Cost
40 lb	0.30	—	—
60 lb	0.45	—	—
80 lb	0.60	—	—

Bag yields are estimates; verify with your supplier.

Formulas assume solid pour and typical bag yields. Always verify specs with your supplier and field conditions.