Home project calculators that show their work.
Search 48 practical tools for measurements, materials and planning quantities. Every calculator includes its formula, assumptions, worked example and purchase guidance.
Area & volume
Convert room, wall and project measurements into square feet, cubic feet and cubic yards.
Concrete & masonry
Estimate ready-mix volume, bags, footings, post holes, blocks, brick, mortar, rebar and pavers.
Concrete
Open calculator concrete bag calculatorConcrete Bags
Open calculator concrete slab calculatorConcrete Slab
Open calculator concrete footing calculatorConcrete Footing
Open calculator concrete post hole calculatorPost Hole Concrete
Open calculator concrete block calculatorConcrete Blocks
Open calculatorLandscaping
Calculate gravel, mulch, topsoil, sod, seed, landscape rock, fill dirt and retaining-wall materials.
Gravel Calculator
Open calculator gravel driveway calculatorGravel Driveway Calculator
Open calculator pea gravel calculatorPea Gravel Calculator
Open calculator crushed stone calculatorCrushed Stone Calculator
Open calculator river rock calculatorRiver Rock Calculator
Open calculator mulch calculatorMulch Calculator
Open calculatorFlooring & tile
Plan flooring, tile, grout, laminate, vinyl plank and carpet purchases with cut waste included.
Roofing & exterior
Calculate roof area, squares, shingles, pitch, metal panels, siding and gutters for planning.
Decks & fences
Estimate deck surface boards, fence panels, pickets and posts from a practical layout.
Paint, drywall & insulation
Estimate paint gallons, drywall sheets and insulation coverage for walls, ceilings and rooms.