Home project guides
Quick answers, charts and worked examples that go with our calculators. Every number is sourced.
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All guides
- ConcreteHow many bags of concrete for a 10x10 slab?Bag charts for 4, 5 and 6 inch slabs in 80, 60, 50 and 40 lb sizes.
- ConcreteHow much does a 10x12 concrete slab cost?Installed cost by thickness, cubic yards and bags, add-ons, and DIY vs pro.
- RoofingHow many bundles of shingles are in a square?Bundles per square, shingles per bundle and square feet per bundle, with a roof-size chart.
- WindowsVinyl vs fiberglass windows: cost comparisonPrice per window from three sources, whole-house costs and which frame is worth it.
- Gravel & landscapingHow much gravel do I need for a driveway?Layer depths, tons by driveway size, the best gravel for each layer, and costs.
- Gravel & landscapingPea gravel vs crushed stone vs river rockPrice per ton, weight, best uses and which works for driveways, paths and drainage.
- Gravel & landscapingHow many tons are in a yard of gravel?Weight per cubic yard by material, plus yards-to-tons and tons-to-yards charts.