Life & fun · September 1, 2026
Materially
Free calculators for every home renovation material
Materially launched on September 1, 2026 with 1 votes, #3,901 of 8,095 launches that month.
What it does
Most home projects start with the same guessing game: how many gallons of paint, bags of concrete, or rolls of wallpaper do you actually need? Materially solves that with seven free, purpose-built calculators for paint, concrete, drywall, flooring, mulch, tile, and wallpaper. Enter your room or area dimensions in feet or meters, and get a precise quantity, including waste allowance, doors/windows deducted, and an optional cost estimate
Free paint calculator. Enter your room size and instantly find out how much paint you need, including coats, doors, windows, and how many cans to buy. No sign-up.
Materially stays free because of the ads on this page. If you're running an ad blocker, consider whitelisting this site — it's the only thing keeping this calculator free, with no sign-up or paywall. Enter your room's dimensions and get a precise answer in gallons, liters, and cans — no sign-up, no guessing, no leftover cans of "eh, close enough." Rough estimates at 8 ft ceilings, 2 coats, one door and one window deducted. Use the calculator above for your exact numbers. A 12×12 ft room with 8 ft ceilings has about 320 sq ft of wall area before subtracting doors and windows. At two coats and 350 sq ft of coverage per gallon, that's roughly 1.7–2 gallons, or about 3 gallons if you're also…from materially.site
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