Buy the right amount the first time.
Paint, drywall, flooring, studs, mulch. The calculators that tell you exactly what you need before you drive to the store.
Home & DIY Tools
Know exactly what to buy before you hit the paint aisle.
Try it texture, coats, tiersMark your studs right the first time.
Try it 4 OC spacingsAccurate drywall sheets in seconds.
Try it adjustable wasteKnow exactly how many boxes to buy.
Try it per-material wasteThe wallpaper roll calculator that prints your shopping list.
Try it pattern match modesThe honest ceramic coating cost and payback calculator.
Try it size, coats, tierShelf tag vs. reality
What the tag says, what the math says, what the tool does about it.
Only on primed smooth drywall, best case. Texture drops coverage to about 300, the rate Walltly computes with, and openings come off first: a standard entry door is 21 square feet, a single-hung window another 12.
WalltlySubtracts every opening you enter, prices budget, mid, and premium tiers, and prints the shopping list.
Real rooms run about 10% waste, and the sheets are usually the smaller half of the bill once joint compound, tape, corner bead, and screws are on it.
DrywlDefaults to 10% waste, keeps it adjustable, deducts up to ten openings, and itemizes compound, tape, and screws.
10% covers a straight lay, whatever the material. A 45 degree diagonal or herringbone bumps it to 15%, and chevron or parquet can push 20%.
LaydownShips the 10% straight and 15% diagonal defaults, keeps the waste figure editable, and takes up to four rooms per project.
Pattern match sets the real number. No match, straight match, and half-drop each waste differently, and every roll has to come from one dye lot.
RollsyMatch-type setting, a waste slider from 0 to 30%, and a printable list with the dye-lot reminder on it.
At the 3-inch depth most beds want, a 2 cubic foot bag covers 8 square feet and a 3 cubic foot bag covers 12. A single bed eats bags fast.
MulchlyConverts beds to cubic yards and bag counts in both sizes, up to five beds with a running total.
Centers sit 16 inches apart, but the end studs land where the wall ends. A wall that is 9 feet 7 inches long divides evenly by nothing, and head-counting misses by one about half the time.
StudmarkLays out 12, 16, 19.2, and 24 inch OC and prints a dimensioned strip you can mark the plate against.
The target is a carbon-to-nitrogen ratio near 30:1, and nobody measures a pile in ratios. You measure it in buckets and armfuls.
RotioTurns the C:N math into a recipe in the units you scoop with: which material to add, and how much of it.
The number that matters is payback: what the coating costs against what you would spend on washes and wax over the same stretch of months.
CoatIQItemizes the DIY cost, estimates the pro job, and names the month the coating breaks even. When it never does, it says so.
See all 51 tools.