Construction Calculators
Measure twice, buy once. Estimate concrete, paint, tile, roofing and more before you head to the store, with waste allowances built in so you don't run short in the middle of the job.
Concrete Calculator
Cubic yards of concrete for slabs, footings and columns — plus bag counts.
Open toolPaint Calculator
Gallons of paint for your room, accounting for doors, windows and coats.
Open toolGravel Calculator
Tons and cubic yards of gravel for driveways, paths and drainage.
Open toolSand Calculator
How much sand you need by area and depth, in tons, yards or bags.
Open toolSquare Footage Calculator
Area of rooms and plots in square feet, meters, yards and acres.
Open toolTile Calculator
Tiles needed for floors and walls, including grout gaps and a waste allowance.
Open toolRoofing Calculator
Roof area, squares and shingle bundles from pitch and footprint.
Open toolDrywall Calculator
Sheets of drywall for walls and ceilings, with screw and tape estimates.
Open toolFence Calculator
Posts, rails and pickets for a fence of any length and style.
Open toolMulch Calculator
Bags or cubic yards of mulch for garden beds at any depth.
Open toolBoard Foot Calculator
Board feet from thickness, width, length and quantity — with an optional cost total.
Open toolStair Calculator
Risers, actual riser height, treads, total run and stringer length from your total rise.
Open toolBrick Calculator
Bricks for a wall by brick size, with the 3/8 in mortar joint and a waste allowance built in.
Open toolAsphalt Calculator
Cubic yards and tons of asphalt for a driveway or patch, at an editable density.
Open toolFlooring Calculator
Boxes of flooring for your room, with waste allowance and box coverage.
Open toolDeck Calculator
Deck boards, linear feet and joist count for your deck size and board width.
Open toolMeasure twice, buy once
Materials are the expensive part of any project, and both mistakes hurt: order too little and you lose a day to a second trip; order too much and you paid for concrete, tile or mulch you will never use. These calculators work from the coverage rates and waste allowances contractors actually use, and each one states its assumptions on the page so you can adjust them to your job.
Start with the Square Footage Calculator to get areas right, then price the materials: the Concrete Calculator for slabs and footings in cubic yards and bags, the Tile Calculator with grout-gap and breakage allowance, and the Roofing Calculator for bundles and squares. Always round deliveries up to the supplier's pack sizes shown in the results.
Project-specific estimators cover the rest of the job list: Board Foot for lumber, the Stair Calculator for risers, treads and stringers, the Brick Calculator with mortar joints counted, the Asphalt Calculator in cubic yards and tons, the Flooring Calculator in boxes, and the Deck Calculator for boards, linear feet and joists — each with its assumptions stated on the page.