Home & Construction
Estimate materials for any project - concrete, paint, roofing, mulch, gravel, square footage and more. Enter your dimensions and get the quantity to order, with sensible allowances for waste.
Popular in this category: Concrete Calculator, Paint Calculator, Roofing Calculator
Concrete Calculator
Calculate cubic yards of concrete for slabs, footings & columns
Paint Calculator
Estimate how many gallons of paint you need
Roofing Calculator
Estimate roofing squares, shingles and materials
Roof Pitch Calculator
Calculate roof pitch, angle and rafter length
Mulch Calculator
Calculate cubic yards or bags of mulch for your beds
Gravel Calculator
Calculate tons or cubic yards of gravel needed
Topsoil Calculator
Calculate how much topsoil or dirt you need
Sand Calculator
Calculate the amount of sand needed by volume or weight
Square Footage Calculator
Calculate the square footage of any area
Cubic Yard Calculator
Convert dimensions to cubic yards for any material
Stair Calculator
Calculate stair stringer, rise and run dimensions
Asphalt Calculator
Estimate tons of asphalt needed for paving
Tile Calculator
Calculate how many tiles you need for a floor or wall
Flooring Calculator
Estimate flooring material and boxes needed
Drywall Calculator
Calculate sheets of drywall and materials
Fence Calculator
Estimate posts, rails and pickets for a fence
Deck Calculator
Estimate decking boards and materials
Board Feet Calculator
Calculate board feet of lumber
Brick Calculator
Calculate how many bricks you need
Rebar Calculator
Calculate rebar quantity and spacing for a slab
BTU Calculator
Estimate the BTUs needed to heat or cool a room
Carpet Calculator
Estimate carpet square footage and cost
Ohm's Law Calculator
Calculate voltage, current, resistance and power
Voltage Drop Calculator
Calculate voltage drop over a wire run
Electricity Cost Calculator
Calculate the cost of running an appliance (kWh)
Resistor Color Code Calculator
Decode resistor color bands to resistance and tolerance
About home & construction calculators
Pick the calculator for your material
The Concrete Calculator returns cubic yards for slabs, footings and columns; the Paint Calculator converts wall area into gallons. For landscaping, the Mulch, Gravel and Topsoil calculators work in cubic yards, and the Square Footage Calculator is the starting point whenever you need an area first.
What you need to enter
Measure length, width and depth (or thickness) in feet and inches. Concrete and landscape tools convert those dimensions to cubic yards, since that is how suppliers sell bulk material. Always round up and add a waste allowance - roughly 5-10% - for spillage, uneven ground and offcuts.
A worked example
A concrete slab 10 feet by 12 feet at 4 inches thick works out to about 1.48 cubic yards (10 × 12 × 0.333 ÷ 27). Suppliers deliver in quarter-yard increments, so you would order 1.5 yards, and on a real pour many crews bump that slightly to cover spillage and an uneven subgrade.
Frequently asked questions
Why do results come in cubic yards?
Bulk materials like concrete, gravel, mulch and topsoil are sold by the cubic yard in the U.S. One cubic yard equals 27 cubic feet. The calculators convert your feet-and-inches measurements automatically.
Should I order extra material?
Yes. Add roughly 5-10% for waste from spillage, uneven surfaces and offcuts. It is cheaper to have a little left over than to stop mid-project and reorder.
Are these estimates exact?
They are close estimates based on the dimensions you enter. Real sites have irregular depths and shapes, so treat the result as an order guide and confirm with your supplier for large pours.