Paint & Materials Calculators
7 calculators7 free calculators for paint & materials homeowners.
Caulk Coverage
Figure out how many tubes of caulk to buy by total length, bead size, and cartridge size. Bead width is the big driver — coverage falls with the square of bead size — so a 1/4" joint eats caulk far faster than a thin 1/8" bead. Includes an optional cost estimate.
Concrete Volume
Calculate how much concrete your project needs. Enter slab, footing, or round-column dimensions to get cubic yards and the number of 40, 60, or 80-lb bags — with waste included.
Deck Stain & Sealer Coverage
Figure out how many gallons of deck stain or sealer to buy. Accounts for railings, wood condition, finish type, and number of coats so you don’t run out mid-project.
Exterior House Painting Cost
Painting a house exterior costs $1.50–$5.00 per square foot of wall — $2,600–$8,500 for a typical 2,000 sq ft home. Price your size and siding type, and see how many gallons the job takes.
Interior Painting Cost
Painting a room professionally costs $350–$850, and a whole 2,000 sq ft home interior runs $6,000–$8,000 — or $100–$300 per room DIY. Price your scope and see where painting money actually goes.
Paint Coverage
Calculate how many gallons of paint to buy for a room. Enter dimensions or wall area, deduct doors and windows, plan for two coats, and add ceiling and primer.
Tile & Grout
Calculate how many tiles to buy (with waste for cuts and pattern) and how much grout you need, based on your tile size, grout joint width, and tile thickness.
About Paint & Materials Calculators
Buying the wrong amount of paint is one of the easiest and most expensive mistakes homeowners make. You'll either waste money on excess paint that dries up in your garage, or worse, discover mid-project that you're short and can't find an exact color match days later. The square footage of your walls matters far less than accounting for multiple coats, surface absorption rates, and the actual coverage your specific paint provides—which varies dramatically by type and brand.
Our paint calculator handles these real variables so you know precisely how many gallons to buy before you leave the store. Beyond paint, material costs often surprise homeowners because they underestimate both quantity and waste. Drywall, flooring, tile, and lumber all require accounting for cuts, breakage, and the pattern-specific waste that comes with certain installations.
A tile project with diagonal patterns needs significantly more material than a simple grid layout, yet most people calculate as if waste doesn't exist. These calculators break down what you actually need to order, including standard waste percentages, so your budget estimate reflects reality. By using the right numbers upfront, you'll avoid expensive return trips, project delays, and the frustration of miscalculations that derail your timeline.