Free Stone Calculators & Material Estimators

Every calculator on this site, organized by what you’re trying to do — estimate a material, plan a project, convert units, or build something layered like a patio or wall. Each tool returns cubic yards, tons, and bags, with a waste allowance built in.

Browse Every Calculator

Search the full index below, or jump into a category above. Every tool is free, instant, and uses the correct density for its material.

Choosing the Right Tool for Your Job

Estimating a specific material? Start in Aggregate & Stone Estimators — each calculator there is pre-loaded with the correct density for its material, from crushed stone and #57 to pea gravel and river rock, so the tonnage you get matches what the quarry will weigh out.

Planning a whole project? The Landscape & Construction tools think in projects, not materials: driveways with base and surface layers, garden beds, and coverage planning with the right depth defaults already set.

Stuck between units? You plan in cubic yards but suppliers quote in tons. The Weight & Conversion calculators bridge that gap with material-accurate density conversions in both directions.

Building something layered? Paver patios, walls, and veneers need more than one material calculated together — base stone, bedding, and finish. The Wall, Patio & Specialty tools handle those multi-layer estimates.

How Our Calculators Work

Every estimate runs the same three-step math a quarry uses: area × depth gives cubic feet, dividing by 27 converts to cubic yards, and multiplying by the material’s density converts volume into the tons suppliers actually sell. Because density varies — crushed stone is about 1.5 tons per cubic yard, pea gravel 1.35, lava rock only 0.65 — picking the right calculator matters more than it looks.

New to estimating? Start with how to measure your yard for stone, then read crushed stone sizes explained to pick a grade. All calculations run in your browser — nothing you enter is sent anywhere.