Construction Calculators

Construction and DIY calculators that help you order the right amount of material. The square footage calculator measures rectangles, circles and triangles, converts the area to square yards, square meters and acres, and can estimate cost from a price per square foot. The gravel calculator turns length, width and depth into cubic yards, tons and bags for your gravel type, with an allowance for compaction. Each tool lists its assumptions and shows a worked example, so you can sanity-check the result before you buy.