How many yards do I need?
Free construction and landscaping material calculators
Enter your measurements and see exactly how much concrete, gravel, mulch, topsoil, paint, drywall, roofing, or decking to buy. Free, no signup, with the math shown.
Concrete, gravel, mulch, and soil by the cubic yard
Bulk materials share one question: how many cubic yards, and how many bags?
- Concrete CalculatorSlab volume in cubic feet, cubic yards, and cubic meters, with ready-mix order size and bag counts for documented products.
- Gravel CalculatorGravel, crushed rock, or landscape rock volume in cubic yards and meters, with an optional weight from your supplier's density.
- Mulch CalculatorMulch volume in cubic yards for any bed, plus a whole-bag count for the bag size you are buying.
- Topsoil CalculatorTopsoil volume in cubic yards and meters for lawns, beds, and fill, with an optional weight from your supplier's density.
Roofing, paint, drywall, and decks
Slope, coverage, and sheet or board counts.
- Roof Pitch CalculatorPitch as x/12, roof angle in degrees, slope percentage, and the sloped length for a given horizontal run.
- Paint CalculatorGallons or liters of paint for your walls and number of coats, using the coverage printed on your paint's label.
- Deck CalculatorDecking board count from deck size, actual board width, gap, and board length, with the cutting assumptions shown.
- Drywall CalculatorDrywall sheet count for walls and ceilings from room dimensions or total area, minus openings, by sheet size.
- Roofing CalculatorRoof area, roofing squares, and shingle bundles from a footprint and pitch, using the coverage on your shingle wrapper.
How the calculators work
- 01
Measure
Length, width, and depth, in feet, inches, meters, or centimeters.
- 02
Calculate
The answer updates as you type, with the formula shown step by step.
- 03
Order
Purchase quantities round up to whole bags, sheets, cans, or supplier steps.
Product figures such as concrete bag yields come from manufacturer data sheets, linked on every page. Read our editorial standards.
Material planning guides
Cubic yards, bag yields, odd-shaped areas, and getting a delivery right.
- GuideBagged vs. Bulk Materials: Which Should You Buy?How to compare bags and bulk delivery using bags per cubic yard and your own local prices.
- GuideConcrete Bag Yields by Bag SizePublished cubic-foot yields for bagged concrete mixes, with bags per cubic foot, cubic yard, and cubic meter.
- GuideHow to Measure an Irregular AreaSplit odd shapes into rectangles, triangles, circles, and trapezoids, then average width and depth.
- GuideHow to Plan a Bulk Material DeliveryRounding to supplier increments, questions to ask, and a checklist before bulk material arrives.
- GuideWhat Is a Cubic Yard?What a cubic yard is, how to convert area × depth into yards, and how much ground one yard covers.