Know how much you need before you buy.

Free calculators and plain-English guides for gravel, concrete, mulch, fences, decks, pavers and more. Every result shows its math.

Start with a calculator

Enter your size, get the amount to order.

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Browse by project

Guides with charts, worked examples and cited sources.

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How it works

1. Enter your sizeLength, width and depth in feet and inches.
2. See the mathEach result includes a worked line you can check.
3. Confirm and orderResults are estimates. Check quantities with your supplier.