Know exactly how much material to buy.
Concrete, mulch, gravel, soil — estimated in seconds. Stop guessing, stop overbuying, and walk into the store with a number.
Live estimate
Leave at 0 if you only need volume.
Calculators
Pick a material and get an estimate in under a minute.
Concrete Slab Calculator
Enter your slab dimensions to get cubic yards, the number of 80-lb bags, and an optional cost estimate — with a waste margin so you don’t run short.
Open calculator →Fence Post Concrete Calculator
Enter your post count, hole size, and depth to get the exact number of concrete bags — no more guessing a bag per post and running short.
Open calculator →Paver Calculator
Enter your patio or walkway dimensions and paver size to get the paver count — plus the base gravel, bedding sand, and joint sand for a full install.
Open calculator →Retaining Wall Calculator
Enter your wall length, height, and block size to get the block count — plus cap blocks, base trench gravel, and the drainage backfill most DIYers forget.
Open calculator →Mulch Calculator
Enter your bed area and depth to see how many cubic yards of mulch you need — and how far it will spread.
Open calculator →Gravel Calculator
Enter your area and depth to get cubic yards and an estimated tonnage for driveways, paths, and drainage rock.
Open calculator →Topsoil Calculator
Enter your bed area and depth to see how many cubic yards of topsoil you need for planting and topdressing.
Open calculator →Sand Calculator
Enter your area and depth to get cubic yards, tonnage, and bag counts — for paver bedding, sandboxes, lawn leveling, and fill.
Open calculator →River Rock Calculator
Enter your area and depth to get cubic yards and tonnage of river rock for beds, borders, drainage swales, and dry creek beds.
Open calculator →Fill Dirt Calculator
Enter your area and depth to get cubic yards and tonnage of fill dirt for grading, backfilling, and raising low spots — with compaction factored in.
Open calculator →Sod Calculator
Enter your lawn dimensions to get the square footage, rolls, and pallets of sod to order — with a margin for edge cuts and curves.
Open calculator →Grass Seed Calculator
Enter your lawn size and grass type to get the pounds of seed you need — for a brand-new lawn or overseeding thin turf.
Open calculator →Raised Bed Soil Calculator
Enter your bed dimensions to get the exact soil volume in cubic feet, yards, and bags — plus a proven 60/30/10 mix breakdown.
Open calculator →Why Yardly
Instant results
Type your dimensions and see cubic yards, bags, and cost in real time — no math, no spreadsheets.
No overbuying
We add the right waste margin so you order what you need, not a half-loaded truck you can’t return.
Works on site
Mobile-first and offline-friendly. Pull it up from the aisle at the home center.
Always free
No account, no paywall. Just open the tool and estimate.
Frequently asked questions
Are these calculators accurate?
They use standard volume math (length × width × depth ÷ 27 for cubic yards) and a typical 10% waste margin. They’re for planning; confirm with your supplier for exact yields.
Do I need to create an account?
No. Every Yardly calculator is free and works without sign-up.
How do you make money?
Yardly is supported by advertising. We do not sell our own products, and we never charge you to use a calculator.
Can I use this on my phone at the store?
Yes. The site is built mobile-first so you can estimate right from the aisle.