Construction & DIY Calculators
Practical estimators for home improvement projects and job sites. Calculate concrete volumes, lumber board feet, paint coverage, tile layouts, and mulch needs.
Board Feet Calculator
Calculate total board feet measurements for hardwood and construction lumber quantities.
Square Footage Calc
Determine total square feet (sq ft) of a room or area for tiling, flooring, or landscaping.
Mulch Coverage Calc
Calculate how many bags or cubic yards of mulch you need based on thickness and garden area.
Paint Coverage Calc
Estimate how many gallons of paint are needed to cover walls based on room dimensions.
Concrete Bags Volume
Estimate how many 80lb, 60lb, or 40lb bags of concrete mix you need to pour a slab.
Gravel Weight Calc
Convert gravel coverage volume in cubic yards to bulk tons for delivery ordering.
Lumber Linear/Board Ft
Convert linear feet of standard boards of various widths into total board feet.
Roofing Square Calc
Determine how many roofing shingles and squares you need to purchase based on pitch and roof area.
Tile Coverage Calc
Calculate how many individual ceramic, stone, or porcelain tiles are needed, plus wastage factor.
Concrete Mix Ratios
Determine parts of cement, sand, gravel, and water required for standard strength concrete mixes.
Rebar Weight Calc
Estimate total weight and count of steel reinforcing bars (rebar) needed for concrete slabs.
Construction & DIY FAQs
What is a board foot in lumber?
A board foot is a specialized unit of volume for lumber. It is equivalent to a volume of 12 inches by 12 inches by 1 inch, or 144 cubic inches. The formula is: Board Feet = (Thickness in inches × Width in inches × Length in feet) / 12.
How do I calculate concrete volume for a slab?
To calculate concrete volume for a rectangular slab: (1) Measure the length, width, and depth (thickness) in feet. (2) Multiply all three numbers together to get cubic feet. (3) Divide the cubic feet result by 27 to convert it to cubic yards, which is the standard ordering unit. One 80lb bag yields about 0.6 cubic feet of mixed concrete.
How much square footage does a gallon of paint cover?
As a general rule, one gallon of quality wall paint will cover between 350 and 400 square feet with a single coat. Rough or porous surfaces like raw drywall or stucco may require more paint, reducing coverage to about 250 square feet per gallon.