Concrete Calculators
Estimate material requirements for footings, slabs, structural columns, block walls, and steps. Whether you are ordering ready-mix truck delivery or buying pre-mixed bags from the hardware store, our professional estimators calculate total volume in cubic yards and standard bags instantly.
Pro tip: Ready-mix concrete companies usually require a 1-yard minimum order. For smaller projects under 1 cubic yard (such as post holes, small footings, or minor patio slabs), buying pre-mixed 80lb or 60lb bags is more cost-effective.
Slab
Rectangular slabs, patios, driveways, sidewalks
Footing
Pier holes, deck footings, fence post foundations
Rebar
Rebar quantity, spacing, weight, and ties for slabs
Block Fill
CMU blocks, mortar, and grout fill for walls
Mix Ratio
Cement, sand, and gravel quantities by mix ratio
Steps
Staircases with optional landing extensions
Column
Round and square structural columns
Wall
Walls with door and window opening deductions
Tube Form
Cardboard tube forms (Sonotubes) and piers
Curb & Gutter
Concrete volume for curbs, gutters, and drainage channels
Featured Concrete Guides
Concrete Slab Thickness Guide: Patios, Driveways, and Sheds
Learn the standard concrete slab thickness requirements for different projects. Find recommended thickness for driveways, patios, walkways, shed foundations, and RV pads.
concreteBrick & Mortar Estimating Guide: How to Calculate Masonry Materials
Learn how to calculate the number of bricks and bags of mortar needed for brick walls, including standard and utility brick sizes.
concreteHow Many Concrete Bags for a 10x10 Slab? (4" & 6" Depths)
Calculate exactly how many 80lb or 60lb bags of concrete you need for a 10x10 slab. Includes formulas, waste factors, and thickness calculations.
Frequently Asked Questions
How many 80lb bags of concrete are in a cubic yard?
There are exactly 45 bags of 80lb pre-mixed concrete in one cubic yard. If you are using 60lb bags, you will need 60 bags to make one cubic yard.
What is the standard concrete thickness for a driveway?
For standard residential driveways supporting light vehicles, a slab thickness of 4 inches is typical. For heavier trucks, RVs, or poor soil conditions, 6 inches is recommended for safety.
How much concrete waste should I assume?
A standard waste factor of 10% is recommended for most residential concrete slab pours to account for uneven grade excavations, formwork flexing, and minor spillage.
How to clean concrete floors?
To clean concrete floors, start by sweeping or vacuuming dirt and debris. For unsealed concrete, wash the surface with a solution of warm water and pH-neutral cleaner or a mild dish soap; avoid using highly acidic cleaners (like vinegar or citrus sprays) as they can chemically etch and dull the concrete finish. For tough oil or grease stains, apply a commercial degreaser or a paste of baking soda and liquid soap, scrub gently with a nylon brush, and rinse thoroughly. For sealed or polished concrete, mop with a microfiber pad using clean water to preserve the seal coat.
Why trust our calculators
Open-source formulas
Every calculation shows its formula, a worked example, and common mistakes. You can verify the math yourself before ordering materials.
Imperial & metric support
Switch between imperial (feet, inches, cubic yards) and metric (meters, centimeters, cubic meters) on any calculator. Results update instantly.