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Terms of use

By using ExaCalculator you accept these terms. They exist to be clear about one thing above all: results are planning estimates, and your own measurements are the final word. Last updated 4 November 2026.

Estimates, not guarantees

Calculator results are computed from the formulas and constants printed on each page. Material sizes, weights, coverage and prices vary by supplier, region and batch. Always confirm quantities, dimensions and prices with your supplier before ordering, and take site measurements yourself. ExaCalculator is not responsible for material shortages, overages, costs or project outcomes that follow from using an estimate.

Not professional advice

These tools support planning for home and garden projects. They are not engineering, structural, electrical or safety advice. Work that affects a structure, a load, a utility or a building code needs a licensed professional in your area, regardless of what any calculator returns.

Using the site

The tools are free for personal and commercial project planning. You may link to any page. You may not scrape the site at a volume that degrades it for others, misrepresent results as ours when you have altered them, or use the site for anything unlawful.

Content and accuracy

We work to keep formulas and constants accurate and sourced, and we correct errors when they are reported. The site is provided as is, without warranties of any kind, and content may change or be removed at any time. If a page and these terms ever conflict on what a result means, the estimate disclaimer above governs.

Contact

Questions about these terms go through the contact page.