Job-site math, done in your browser
Know exactly how much material to buy — before you're back in line at the checkout.
Enter your measurements, get real quantities: bags, yards, tons, gallons, sheets. No sign-up, no guessing, no "roughly."
Concrete Calculator
Cubic yards from your dimensions, converted straight to a bag count for 40, 60, or 80 lb bags.
Calculate → BEDS · BORDERS · PATHSMulch Calculator
Coverage area and depth converted to cubic yards, bag count, and a bulk-vs-bagged cost estimate.
Calculate → DRIVEWAYS · PATHS · BEDSGravel Calculator
Tons needed by material type — pea gravel, crushed stone, river rock — from area and depth.
Calculate → ROOFSRoofing Squares Calculator
Roof footprint and pitch converted to squares and shingle bundles, with a standard waste factor.
Calculate → INTERIOR · EXTERIORPaint Calculator
Wall square footage, minus doors and windows, converted to gallons needed for one or two coats.
Calculate → WALLS · CEILINGSDrywall Calculator
Room dimensions converted to standard 4×8 sheet count, with a waste factor built in.
Calculate → YARDS · PROPERTY LINESFence Calculator
Fence line length and style converted to post count, panel sections, and concrete needed.
Calculate → PATIOS · WALKWAYSPaver Calculator
Patio or walkway dimensions converted to paver count, base material, and bedding sand.
Calculate → LAWNS · GARDEN BEDSTopsoil Calculator
Lawn or garden bed dimensions converted to cubic yards, bag count, and weight.
Calculate →Why estimate before you buy
Buying material by guesswork almost always goes one of two ways: you overbuy and eat the cost of what you can't return, or you underbuy and lose an afternoon on a second supply run mid-project. Both are avoidable with the actual numbers in front of you before you leave the house.
Every calculator on this site works the same way: you enter your real measurements, it runs the standard industry formula for that material — the same math a supplier or contractor would use — and shows you the result along with the formula itself, not just a black-box number. A 10% waste factor is built into most calculators by default, since uneven ground, spillage, and cut waste are a normal part of almost every project, not an edge case.
Built for planning, not final orders
These figures are meant to get you close enough to shop with confidence — not to replace a supplier's or contractor's final measurement. Site conditions, product-specific coverage rates, and regional pricing all vary, so treat the output here as a strong starting estimate rather than an exact order quantity for a large or high-stakes project.