Construction & Trades Toolkit
Estimate the materials before you buy them.
Fast, free, no-signup calculators for the trades — concrete, paint, roofing, and more. Plug in the dimensions, get the quantities and bags to order.
Featured tool
The calculators
Each one is instant and works entirely in your browser — US units, no signup.
Concrete Calculator
Cubic yards and bags for a slab, footing, or pour.
Open calculator PaintingPaint Calculator
Gallons needed from room size, coats, and coverage.
Open calculator RoofingRoofing Calculator
Squares and shingle bundles, adjusted for roof pitch.
Open calculator AggregateGravel Calculator
Cubic yards and tons of gravel, stone, or fill by depth.
Open calculator InteriorDrywall Calculator
Sheets, mud, tape, and screws for a room.
Open calculator FlooringFlooring Calculator
Boxes of flooring with a waste allowance.
Open calculator TileTile Calculator
Tiles and thinset for a floor or wall area.
Open calculator LandscapeMulch Calculator
Cubic yards and bags of mulch by bed area.
Open calculator FramingStair Calculator
Rise, run, and stringer layout to code.
Open calculator LumberBoard Foot Calculator
Board feet and lumber cost for an order.
Open calculator HVACHVAC BTU Calculator
Cooling and heating size for a room.
Open calculator ElectricalWire Size Calculator
Wire gauge and voltage drop by load.
Open calculatorWhy tradespeople use GritCalc
Material math shouldn't need a spreadsheet on the tailgate. GritCalc gives you the quantities — yards, bags, squares, bundles, gallons — instantly, in the US units suppliers actually sell in.
- Instant & private: everything runs in your browser; nothing you type is stored or sent.
- Order-ready numbers: results round to whole bags, bundles, and boxes so you know what to buy.
- Honest defaults: realistic example dimensions are pre-filled — replace them with your job.
Result
Concrete needed