Free Construction Calculators
Instant material estimates for your next project. No signup, no fluff — just the numbers you need.
Our Calculators
Pick a calculator to get started — results in seconds.
Concrete Calculator
Calculate cubic yards, cubic feet, and number of bags for slabs, footings, walls, and columns. Includes cost estimate.
Roofing Calculator
Estimate shingle bundles, roofing squares, and material cost by roof type and pitch. Works for gable and shed roofs.
Lumber Calculator
Find board feet, linear feet, and total lumber cost. Supports common sizes like 2×4, 2×6, and custom dimensions.
Paint Calculator
Figure out exactly how many gallons of paint you need for any room. Accounts for doors, windows, and number of coats.
Square Footage Calculator
Calculate area for rectangles, L-shapes, circles, and triangles. Add multiple rooms and get a running total.
Built for the Job Site
Why SiteCalc exists
Most online calculators are cluttered, slow, and designed for desktop. SiteCalc is built to work on your phone in a muddy truck. Every calculator gives you instant results with no ads in the way of the numbers, no account creation, no BS. Just type in your dimensions and get your answer.