Painting
Paint Calculator
How many gallons for your walls and ceiling, with door and window deductions.
LivePrimer Calculator
Primer needed for bare drywall, patches, or covering dark colors.
LiveWallpaper Calculator
Rolls needed by wall size and pattern repeat.
LiveStain & Sealer Calculator
Coverage for decks, fences, and furniture by wood type.
Flooring
Landscaping
Mulch Calculator
Cubic yards or bags for beds by depth.
LiveGravel Calculator
Tons or yards for driveways, paths, and drainage.
LiveTopsoil Calculator
Fill volume for beds, lawns, and leveling.
LiveSod Calculator
Rolls or pallets for your lawn area.
LivePaver Patio Calculator
Pavers, base gravel, and sand for a patio.
LiveFence Calculator
Posts, rails, pickets, and concrete by fence length.
Framing & Structure
Latest guides
How Much Paint Do You Need for a 12×12 Room?
The straight answer, the math behind it, and the three situations where the standard answer is wrong.
LandscapingCubic Yards, Explained Once and For All
How to think in the unit nobody can picture — and the conversions worth memorizing.
LandscapingWhat a DIY Paver Patio Really Costs in 2026
Line by line: materials, rentals, and the honest DIY-vs-contractor math.
Numbers you can check
Every calculator shows its formula and cites where the rates come from. No black boxes.
Built for the store aisle
Results come as a shopping list — cans, bags, and boxes — not just raw square footage.
Kept current
Rates are reviewed yearly and each tool shows its verification date. Read our methodology.
Sumshed is an independent site built by a DIYer, for DIYers. It's free to use and supported by ads that never influence our math. More about us.