Know exactly how much material you need before you buy it.
Free calculators across concrete, aggregates, fencing, decking, roofing, soil, and more. Enter your dimensions and get bags, yards, and real cost estimates in seconds — no guesswork, no overordering.
🧱 Concrete Slab Calculator
Find the right calculator for your project
Organized by material, so you can move from planning to buying in one visit.
Concrete
Slabs, footings, columns, stairs and driveways — exact bag counts and yardage. Thickness is set by load, not by area: 4 inches carries foot traffic, 6 inches carries a car. Below roughly half a cubic yard, bags beat ready-mix on price; above it, the mixing labour eats you alive.
View all concrete tools →Masonry & Stone
Brick, block, pavers, and stone veneer — material counts for anything built unit by unit. Get exact piece counts, mortar or polymeric sand quantities, and a full material list before you order.
First calculators launching this week
Explore masonry & stone →Aggregates
Sand, gravel, crushed stone and paver base — sized by tons or cubic yards. This is the category people most often under-order, because suppliers price by the ton while the job is measured in yards. A cubic yard of gravel weighs about 2,800 lb, so a ton buys only about 0.71 yards.
Start with the gravel calculator →Fencing
Wood, vinyl and chain link — sized by total run length, not fence height alone. Post spacing depends on wind load and panel style, and gate posts need a bigger footing than line posts, so every calculator here builds that in.
View all fencing tools →Decking
Deck boards, joists, railing, stairs, and stain — everything measured for a deck build. Covers both traditional lumber and composite decking, with waste allowance built in.
First calculators launching this week
Explore decking →Roofing
Shingles, metal panels, underlayment, and gutters — sized by roof area and pitch. Get bundle counts, panel counts, and linear footage for a complete order.
First calculators launching this week
Explore roofing →Outdoor Structures
Footings and foundations for pergolas, sheds, greenhouses, and above-ground pools. These calculators size the base so the structure above it doesn’t shift or settle.
First calculators launching this week
Explore outdoor structures →Soil & Mulch
Topsoil, mulch, compost and raised beds — bags or bulk yards, your choice. Depth is dictated by purpose: mulch goes down 2–3 inches, lawn top dressing half an inch, a new bed 6–12 inches. Raised beds swallow far more than people expect — a 4 × 8 ft bed at 12 inches deep is nearly 1.2 cubic yards, close to forty bags.
View all soil & mulch tools →Lawn & Turf
Sod, seed, artificial turf, and topdressing — coverage calculators sized by square footage for starting or renewing a lawn.
First calculators launching this week
Explore lawn & turf →Irrigation & Water
Sprinkler coverage, drip irrigation, rain barrels, and pond or tank volume — sizing for anything that moves or holds water in your yard.
First calculators launching this week
Explore irrigation & water →Earthwork & Drainage
Cut and fill, grading, culverts, and drainage gravel — the site work that happens before anything gets built. Covers volume, slope, and pipe sizing for moving water off your site.
First calculators launching this week
Explore earthwork & drainage →Interior Finishes
Drywall, insulation, paint, tile, and flooring — material counts for finishing a room from framing to floor. Enter your room dimensions and get sheets, gallons, boxes, or square footage with waste included.
First calculators launching this week
Explore interior finishes →Popular calculators
The tools people reach for most before starting a project.
How Material Calculate works
No accounts, no spreadsheets — just accurate numbers in three steps.
Pick your material
Choose from concrete, aggregates or soil calculators built for your exact project type. Each one already knows the right defaults — standard bag yields, typical depths, real material densities — so you aren’t looking anything up.
Enter your dimensions
Length, width, depth or diameter — whatever your project needs. Metric and imperial are both supported, and switching converts your measurements rather than wiping them. A live drawing redraws as you type, so a typo is obvious immediately.
Get your exact amount
See cubic yards, bag counts, weight in tons and an estimated cost, so you know exactly what to order. Print the estimate, download a material list, or copy a link with your numbers already in it to send to your supplier.
Built for people who actually pour, haul, and spread this stuff
MaterialCalculate started with a simple frustration: most online calculators either oversimplify the maths or bury it under ads. You get one number, no context, and no way to check whether it’s right. That is not much use when you are standing in a builders’ merchant deciding what to put on the truck.
So we built ours to be fast, accurate, and based on the same formulas contractors use on site — and then we showed our working. Every calculator states exactly what it assumes: the bag yields, the material densities, the standard depths. When your product or your site differs, you can see precisely which number to adjust. Each one is checked against standard construction references and updated as material densities, bag sizes or industry defaults change.
The tools also answer the questions that come after the volume, because volume alone rarely settles anything. How much will it weigh? Will it fit in the truck? How many bags is that — and is the 80 lb bag actually cheaper than the 60? Should you be ordering ready-mix instead? Those are the decisions that cost real money, and they are the ones we build for.
Learn more about us →How to estimate material for any project
Whether you are pouring a slab, spreading gravel or filling a raised bed, the estimate follows the same five steps. Understanding them means you can sanity-check any number — including one a contractor hands you.
Measure the area
Length and width in feet. For circles use π × radius². For triangles use ½ × base × height. For an L-shaped area, split it into two rectangles and add them — that single trick handles most awkward layouts.
Decide the depth
This is where most estimates fail, because depth is quoted in inches while length and width are in feet. Four inches is 0.333 feet, not 4. Divide the inches by 12 before you multiply anything.
Multiply for volume
Length × width × depth gives cubic feet — the raw quantity, before any allowance.
Convert to the unit your supplier uses
Divide cubic feet by 27 for cubic yards. Bulk material is sold by the yard or the ton; bagged material by yield per bag. If the supplier quotes tons, you need the density, not just the volume.
Add waste and round up
Add 5–10%, then round up to the increment they actually sell — a quarter yard, a whole bag, a full pallet.
Coverage, weight and typical depth
The numbers worth keeping handy before you order.
How much area does a cubic yard cover?
Coverage from one cubic yard, by depth.
| Depth | Coverage | Typical use |
|---|---|---|
| 1 in | 324 sq ft | Top dressing a lawn |
| 2 in | 162 sq ft | Light mulch, decorative gravel |
| 3 in | 108 sq ft | Standard mulch depth |
| 4 in | 81 sq ft | Concrete slab, gravel sub-base |
| 6 in | 54 sq ft | Driveway base, deep beds |
| 12 in | 27 sq ft | Raised beds, deep fill |
What does a cubic yard weigh?
A cubic yard is a fixed volume, never a fixed weight. This table is the difference between a pickup that copes and a pickup that does not.
Approximate dry weight of one cubic yard, by material.
| Material | Weight per yd³ | Tons per yd³ | Yd³ per ton |
|---|---|---|---|
| Wood mulch | 800 lb | 0.40 | 2.50 |
| Compost | 1,000 lb | 0.50 | 2.00 |
| Fill dirt | 2,000 lb | 1.00 | 1.00 |
| Topsoil | 2,200 lb | 1.10 | 0.91 |
| Sand (dry) | 2,600 lb | 1.30 | 0.77 |
| Crushed stone | 2,700 lb | 1.35 | 0.74 |
| Gravel | 2,800 lb | 1.40 | 0.71 |
| Concrete | 4,050 lb | 2.03 | 0.49 |
Typical depth by job
| Project | Material | Depth / thickness |
|---|---|---|
| Patio, walkway, shed base | Concrete | 4 in |
| Driveway, garage floor | Concrete | 5–6 in |
| Sub-base under slab or pavers | Gravel / crushed stone | 4–6 in |
| Bedding layer under pavers | Sharp sand | 1 in |
| Garden bed mulch | Wood mulch | 2–3 in |
| Lawn top dressing | Topsoil / compost | 0.5–1 in |
| New garden bed | Garden soil | 6–12 in |
Why material estimates go wrong
After the geometry, nearly every bad estimate comes down to one of these. Each of them costs money.
Mixing inches with feet
The most common error in the trade. Depth is in inches, length and width in feet. Divide by 12 first, or the number is meaningless.
Confusing volume with weight
A yard of mulch and a yard of concrete fill the same space and weigh five times different. If the supplier prices by the ton and you calculated in yards, you must convert using density.
Ordering the exact calculated amount
The raw geometry assumes a perfectly flat, perfectly excavated site. No site is. Add waste, then round up to the increment they sell.
Forgetting that aggregates compact
Gravel laid 5 inches loose is not a 5-inch base once compacted. A compacted-depth spec needs meaningfully more material than the raw depth suggests.
Bagging a job that wants ready-mix
Above about half a cubic yard, bags cost more per yard and cost you a day of mixing. Price the truck before you fill a trolley.
Trusting a payload you have not checked
A half-ton pickup carries roughly one cubic yard of gravel or soil — but two to three yards of mulch. Weight limits you, not the size of the bed.
Skimping on the sub-base
Concrete and pavers laid on soft ground fail regardless of thickness. A well-bedded 4-inch slab outlasts a badly bedded 6-inch one.
Frequently asked questions
Are these calculators really free to use?
Yes. Every calculator on Material Calculate is free, with no account, email, or download required. Just enter your measurements and get your results instantly.
How accurate are the results?
Our formulas are based on standard construction industry references for material volume, weight, and coverage. Results are estimates meant to guide purchasing — always round up slightly for waste and add a small buffer for uneven ground.
Do you cover materials other than concrete and gravel?
Yes. We now cover 12 material categories — concrete, aggregates, fencing, decking, roofing, masonry, soil, lawn, irrigation, earthwork, outdoor structures, and interior finishes — with new calculators publishing every week.
Can I use these calculators on mobile?
Yes, every calculator is built to work on phones and tablets, so you can run numbers directly from the job site or the store aisle.
How do you calculate how much material you need?
We use the same core method contractors use: convert your measurements to cubic feet, divide by 27 for cubic yards, then apply the material’s density or a calculator’s bag yield to get bags, tons or cost. See the step-by-step guide above for the full method.
How many cubic feet are in a cubic yard?
27. A cubic yard is a cube measuring three feet on every side (3 × 3 × 3 = 27), which is why cubic-foot totals are divided by 27 to get cubic yards.
How much waste should I add to my order?
5–10% covers most projects — uneven ground, spillage and cutting. Irregular shapes or a site with a lot of grade change can push that closer to 10–15%. Every calculator lets you set your own waste percentage.
Why does a cubic yard of one material weigh more than another?
A cubic yard is a fixed volume, not a fixed weight — density is what changes. Concrete packs far more mass into that space than mulch, which is why a yard of concrete weighs roughly five times as much as a yard of mulch. See the weight table above for exact figures.
Should I buy bags or order bulk?
Bags usually work out cheaper below about half a cubic yard; above that, bulk delivery or ready-mix saves money and a lot of labour. Our concrete calculators show both options side by side so you can compare directly.
Can I print or share my estimate?
Yes. Every calculator lets you print your results, and most support copying a link with your numbers already filled in, so you can send an exact estimate to a supplier or contractor.
Stop guessing how much material to buy
Pick a calculator, enter your measurements, and get an exact amount in under a minute.
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