Free Construction Calculators
Accurate, fast, and free calculators for construction professionals and DIY enthusiasts. Calculate material quantities, costs, and specifications for your next project.
Construction Calculators
Brick Calculator
Calculate the number of bricks and mortar bags needed for a wall. Accounts for mortar joint width, brick size, and waste factor.
Concrete Block / CMU Calculator
Calculate how many concrete blocks (CMU), mortar bags, and rebar cells you need for a block wall. Accounts for mortar joints and waste.
Concrete Volume Calculator
Calculate how much concrete you need for slabs, footings, and columns. Results in cubic yards and number of bags.
Deck Board Calculator
Calculate how many deck boards you need for your project, including gap spacing and a 10% waste allowance for cuts and defects.
Drywall Calculator
Calculate how many 4x8 drywall sheets you need plus joint compound and tape. Accounts for doors and windows.
Fence Post Spacing Calculator
Calculate the number of fence posts and sections needed for your fence line. Includes total post material requirements.
Fill Dirt / Excavation Calculator
Calculate the volume of fill dirt needed or soil to excavate. Results in cubic yards, tons, truckloads, and estimated cost.
Gravel Calculator
Calculate cubic yards, tons, and truckloads of gravel or aggregate needed for your project. Includes waste factor adjustment.
Insulation Calculator
Calculate wall insulation needs including total area, batt pieces, rolls, and blown-in bags. Accounts for stud spacing and R-value targets.
Lumber Board-Feet Calculator
Calculate board feet for lumber purchases. Enter dimensions and quantity to get total board footage and estimated cost.
Mulch Calculator
Calculate how much mulch you need for garden beds and landscaping. Results in cubic yards, number of bags, and estimated weight.
Paint Coverage Calculator
Calculate how many gallons of paint you need for a room. Accounts for doors, windows, and multiple coats.
Paver Calculator
Calculate how many pavers, sand bags for the base, and polymeric sand bags for joints you need for a patio or walkway project.
Post Hole Concrete Calculator
Calculate how much concrete you need for setting fence posts, mailbox posts, or deck posts in cylindrical holes. Results in cubic feet and number of bags.
Rebar Spacing Calculator
Calculate the number of rebar bars, total linear feet, and weight for a concrete slab. Supports bar sizes #3 through #8 with industry-standard weights.
Roof Pitch Calculator
Calculate roof pitch as a ratio, angle, and percentage from rise and run measurements. Also computes rafter length and the pitch multiplier factor.
Roofing Shingle Calculator
Calculate roof area adjusted for pitch, number of squares, bundles of shingles, and ridge cap bundles. Includes waste factor.
Sod Calculator
Calculate how much sod you need in pallets and rolls for your lawn. Accounts for irregular shapes and waste.
Stair Calculator (Rise and Run)
Calculate the number of risers, treads, actual riser height, total run, and stair angle from total rise and desired dimensions.
Tile Calculator
Calculate how many tiles, boxes, and bags of thin-set mortar you need for a floor or wall tiling project. Accounts for grout lines and waste.