Buy the right amount of material — the first time.
Home improvement math is annoying. Paint coverage, mulch yardage, drywall sheets, concrete bags — we run the numbers so you do not over-buy or drive back to the store.
Pick your project
12 calculators across four project types. Each gives you exact quantities and a complete shopping list — not just a single number.
Interior projects
Inside the walls — rooms, finishes, built-ins.
Gallons of paint and primer for any room.
Calculate exactly how many gallons of paint and primer you need for your room. Accounts for doors, windows, number of coats, and paint type.
Full material list for any room.
Calculate drywall sheets, joint compound, tape, and screws for your walls and ceilings. Supports 4x8 and 4x12 sheets.
Tile count, boxes, thinset, grout, spacers.
Calculate tile count, boxes needed, thinset, grout, and trim for floor or wall tile projects. Supports any tile size with waste factor.
Exterior structural
Pours, decks, pavement — work that touches the ground.
Tons of hot-mix asphalt for any paved area.
Calculate tons of hot-mix asphalt for driveways, paths, and parking pads. Accounts for thickness and compacted weight.
Yards, 60 lb and 80 lb bags, or ready-mix truck.
Calculate cubic yards of concrete plus the equivalent number of 60 lb or 80 lb bags. Supports slabs, footings, posts, and columns.
Boards, linear feet, fasteners, and cost.
Plan a deck in minutes: board count, linear feet, joist layout, fasteners, and a ballpark cost estimate for pressure-treated, cedar, or composite.
Squares of shingles, bundles, underlayment, nails, and cost.
Size a roofing project: squares of shingles needed for your house footprint and pitch, bundle count, underlayment, nails, and total installed cost.
Landscape material
Mulch, gravel, stone — by the yard, ton, or bag.
Yards, bags, and bulk delivery estimate.
Figure out cubic yards of mulch, number of 2 cu ft bags, and whether bulk delivery is cheaper for your beds.
Tons, cubic yards, and bags for any fill.
Calculate cubic yards and tons of gravel, crushed stone, or rock for driveways, patios, French drains, and fill.
Yards, tons, and bags for decorative stone.
Size decorative river rock, lava rock, or crushed stone for garden beds, borders, and xeriscaping projects.
Cost estimators
Ballpark-a-project tools when materials are not the answer.
Cost estimate to replace windows by count, type, and market.
Ballpark the total cost of a window replacement project — vinyl, wood, fiberglass, composite — with regional labor adjustments.
BTU capacity for cooling or heating any room or whole house.
Size an air conditioner or heater correctly. Factors in square footage, climate zone, insulation, sun exposure, and occupancy to recommend a standard unit size.
Real formulas
Every calculator shows the math it uses, so you can check the output or tweak for your specific project.
Complete shopping lists
Not just "you need 2 gallons." We list every item — paint, rollers, tape, drop cloths — with quantities you can trust.
Shareable results
Every input lives in the URL. Copy the link, share it with your contractor or spouse, come back to the same numbers later.
How does Blueprint Calc compare?
Honest side-by-sides against Calculator.net, OmniCalculator, Inch Calculator, and TheCalculatorSite. We show where each wins — and where we win.