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Concrete Calculators
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Pick the shape you have. Each calculator reports cubic yards or bag counts from the numbers you enter. Treat the figure as a planning estimate, not an order.
How much for a slab or patio?
Length × width × thickness, or square feet you already have.
How much for a driveway?
The same volume math, with thickness notes for vehicles.
How much for a sidewalk?
A long, narrow rectangle with a width you already walked.
How much for a wall?
Length, height, and thickness for a garden wall or stem wall.
How much for a curb or mow strip?
A long rectangular bar. Width and height are in inches.
How much for a footing trench?
Length, width, and depth for a straight rectangle.
How much for a round pad or tube?
A circle or a cardboard pier. Uses π × radius².
How much for a ring or fire pit?
Outer circle minus the inner void. Not a solid pad.
How much for simple stairs?
Steps × width × tread × riser as solid rectangles.