How much material does the job need?

87 free calculators for construction and landscaping. Enter your measurements, get the quantity to order. No sign-up, no fluff.

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Every formula is shownEach page states the formula it uses and walks through a worked example, so you can check the number yourself.
Waste allowance includedResults show both the exact requirement and the figure with a trade-standard waste margin.
Nothing to installRuns in the browser, works on a phone on site, no account and no tracking wall.