Material calculators for building, landscaping, and home projects
Enter your measurements and see how much to buy. Every calculator is free, shows its formula, and rounds purchase quantities up to whole bags, sheets, or supplier steps.
Bulk materials by the cubic yard
Concrete, gravel, mulch, and topsoil 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.
Roofs, walls, and decks
Geometry, 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.
Guides
- Bagged vs. Bulk Materials: Which Should You Buy?
How to compare bags and bulk delivery using bags per cubic yard and your own local prices.
- Concrete Bag Yields by Bag Size
Published cubic-foot yields for bagged concrete mixes, with bags per cubic foot, cubic yard, and cubic meter.
- How to Measure an Irregular Area
Split odd shapes into rectangles, triangles, circles, and trapezoids, then average width and depth.
- How to Plan a Bulk Material Delivery
Rounding to supplier increments, questions to ask, and a checklist before bulk material arrives.
- What Is a Cubic Yard?
What a cubic yard is, how to convert area × depth into yards, and how much ground one yard covers.