How much do you need? Get the number before you go to the store.

Free material calculators for concrete, mulch, gravel, soil, paint, drywall, fences, walls and patios. Every tool shows its formula and cites its bag yields, so you can check the math yourself.

Browse calculators

Concrete

Concrete bag calculator40, 50, 60 & 80 lb bags for any slab Concrete per fence post4x4 & 6x6 posts by hole size Shed base slab8x10, 10x12 & 12x16 shed pads Deck footing / SonotubeConcrete for 8–16 in form tubes Bagged vs ready-mixFind your cost break-even point

Mulch, Soil & Gravel

Mulch calculatorBags vs cubic yards, any depth Mulch for 10x10, 10x20, 20x20 bedsReady answers for common bed sizes Gravel drivewayTons & yards by stone type Pea gravel & patio baseBase gravel, paver sand, pea gravel Topsoil & raised bed soilBags and yards for beds and lawns

Paint & Drywall

Interior paint by roomGallons for walls, ceiling, trim Exterior paintGallons by siding square footage Drywall sheets, mud, tape & screwsFull drywall material list

Fences, Walls & Patios

Fence materialsPosts, rails, pickets & concrete Retaining wall blocksBlocks, caps, base & drain stone Paver patioPavers, base, sand, edging

Project Shopping Lists

10x12 paver patio shopping listEverything for a 120 sq ft patio 100 ft privacy fence shopping list6 ft wood privacy fence, complete

Why you can trust these numbers

Manufacturer bag yields. Concrete bag math uses the QUIKRETE Concrete Mix data sheet (80 lb ≈ 0.60 cu ft, 60 lb ≈ 0.45, 50 lb ≈ 0.375, 40 lb ≈ 0.30).
Formulas shown. Every page explains its math and has a lookup table for common sizes.
Built for the store run. Results round up to whole bags, sheets and gallons, because that's how you buy them.

Frequently asked questions

How accurate are these calculators?

The formulas are exact geometry. Bag yields come from manufacturer data sheets and densities from typical supplier figures. Real-world waste varies, so each tool lets you add extra.

Are the calculators free?

Yes. Every calculator is free and runs in your browser. Nothing you enter is stored.