About StoneArmor
A stone countertop project runs on numbers. How many square feet is the run, once you account for the island and the return? How many slabs does that take after waste? How much sealer covers it in two coats, how much does a 3 cm slab weigh before four people try to carry it, and what should the whole job cost before you call a fabricator? None of these are hard sums on their own — but doing them by hand, on the back of an envelope, is where a lot of good projects pick up an expensive mistake.
StoneArmor exists to take that arithmetic off your plate. Rather than one long guide you have to read end to end, the site is built around a set of small, single-purpose calculators, each aimed at one decision in a stone project. The Countertop Square Footage & Slab Yield calculator sums your sections, adds a fabrication waste allowance, and tells you how many slabs to order. The Stone Tile Coverage Calculator turns an area and a tile size into a tile-and-box count. The Stone Sealer Coverage Calculator works out how many units of impregnating sealer your area and coats require. The Stone Slab Weight Calculator estimates what granite, marble, quartzite, or quartz weighs so you can move it safely. The Edge & Backsplash Linear Footage calculator totals the finished edge you'll pay for by the foot. And the Countertop Cost Estimator adds material, edgework, cutouts, and installation into a budget with a realistic range.
Beyond the calculators, the blog and learn section cover choosing, fabricating, sealing, and caring for natural stone, and the reasoning behind the numbers the tools produce. The Stone & Stonework Museum is a browsable collection of the stones themselves and the craft of working them, with every entry, image, and fact drawn from Wikipedia and Wikimedia Commons.
A few things worth stating plainly. StoneArmor is an independent site — not a fabricator, a slab yard, or a manufacturer, and not affiliated with any stone brand or supplier. It is supported by advertising, which is how the tools stay free with no account required. Every figure the tools produce — an area, a slab count, a sealer quantity, a weight, an edge footage, a cost — is a planning estimate built on the numbers you enter and standard industry conventions, not a fabrication quote or an engineering calculation. For the figures that actually commit your money, confirm with a local fabricator's template and quote before you order stone. If a tool looks off, or there's a calculator you wish existed, the contact page is the place to say so.