Construction Calculators
Estimate materials, dimensions, and construction quantities.
Featured tools
The high-traffic ones in this category.
Lumber Calculator
Estimate board feet for lumber based on dimensions and quantity.
Drywall Calculator
Estimate how many 4x8 drywall sheets you need for a wall area.
Concrete Calculator
Calculate concrete volume in cubic yards for slabs, footings, and pads.
Cement Calculator
Convert cubic yards of concrete into an estimated count of 80 lb cement bags.
Roofing Calculator
Estimate roof surface area from footprint dimensions and pitch.
Shingles Calculator
Estimate shingle bundles needed from total roof area.
Resources
Concept explainers that link back to the tools.
How to Estimate Concrete Cubic Yards
Convert slab and footing dimensions to cubic yards by computing volume in cubic feet, then dividing by 27 and adding waste.
How to Estimate Roofing Squares
A roofing square equals 100 square feet of roof area; material estimates count squares, not flat footprint alone.
Board Feet Explained
Board feet measure lumber volume: one board foot equals 144 cubic inches (12×12×1 inches nominal).
Cubic Yards to Tons for Aggregate
Converting cubic yards of gravel or crushed stone to tons requires material bulk density; volume alone is not weight.
Mulch Coverage Guide
Mulch coverage depends on bed square footage, desired depth in inches, and whether material is loose or compacted after spreading.
About construction calculators
Free construction calculators for concrete, lumber, drywall, roofing, flooring, tile, mulch, and gravel quantities. Estimate material needs for DIY and contractor projects.
- Estimate concrete bags for a slab pour
- Calculate board feet for framing lumber
- Determine tile and flooring coverage
- Plan landscaping mulch and gravel volumes
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