Paste one snippet and your readers get a working material calculator on your page. Free for any site, no signup, no ads or product links inside the widget.
12 calculators: paint, flooring, tile, grout, drywall, wallpaper, baseboard, countertop, fence, gravel, mulch and a renovation budget.
Calculator only: US and metric units, mobile-friendly, results update as you type.
Private: measurements stay in the reader’s browser; nothing is stored or sent.
One condition: keep the small “Calculator by Nestsums” credit and the text link under the iframe.
Live preview: paint calculator
How to add one
Find your calculator below and select Copy code.
Paste it into an HTML block: Custom HTML in WordPress, a Code block in Squarespace, Embed code in Wix, or straight into your page source.
Adjust height if your column is very narrow; the widget scrolls inside the frame if it needs to.
Embed codes
Gravel Calculator
Turn dimensions into cubic yards, bags and optional tons. Keep density in your hands.
One gallon covers about 350–400 ft² per coat, so a 12 × 12 ft bedroom with 8 ft walls needs about 2 gallons for two coats. Enter your walls, doors, windows and coats for your own count, with ceiling and primer options.
Square feet plus 10% waste, divided by the box coverage and rounded up: a 12 × 12 ft room (144 ft²) needs about 159 ft², or 8 boxes of 20 ft². Add every room, subtract built-ins, and see boxes and cost.
Add up your own quotes for materials, labor, permits, fixtures and disposal. Apply sales tax and a contingency reserve, track what you have paid and compare against your ceiling.