Measure once. Buy once.
See the project before you buy the materials.
Most calculators hand you a number. ProjectMath draws the finished wall, floor, or yard as you type — with the exact piece count, spacing, cut list, and cost you can take to the aisle.
Wall Treatments
Layout plans, not just square footage — exact piece counts, spacing, and marks you can transfer to the wall.
Board and Batten
Even spacing solver + printable marking plan
Open calculatorShiplap
Row layout + last-row rip width
Open calculatorWainscoting
Panel layout + rail and stile cut list
Open calculatorAccent Wall
Slat spacing solver + live elevation
Open calculatorWallpaper
Rolls, strips, and pattern repeat waste
Open calculatorPaint
Gallons by coat with openings removed
Open calculatorFloors
Room-by-room coverage with plank and tile layouts drawn to scale, including the cuts at the edges.
Yard & Bulk
Bulk volume for the weekend: depth-aware yardage, tonnage, pallets, and pieces.
How it works
Enter your dimensions
Type your wall, floor, or yard size in feet, inches, or meters. Subtract doors and windows with a tap.
See it drawn to scale
The diagram updates live — every board, plank, or slab placed, with the cut list and spacing marked.
Buy the right amount
Get a shopping list rounded up with waste, your total cost, and a printable plan to take to the store.