Are these estimates exact?
The math is transparent, but product coverage and jobsite conditions can change the final purchase.
Tool Switcher: All Calculators
Project toolsTools
Practical project planning
DIY Project Calculators for Home Materials
Measure twice. Buy once. Turn home improvement measurements into clear material estimates—without hidden math, signup, or saved measurements.
Start a new projectProject selector
What are you working on today?
Start with the material you need to buy.
01
Paint
Walls, coats, openings
Gallons · containers · costOpen calculator →02
Concrete
Slabs, bases, footings, walls
Yards · bags · costOpen calculator →03
Concrete Bags
Known volume to bag count
Bags · costOpen calculator →04
Concrete Slab
Multi-section slabs
Volume · bags · costOpen calculator →05
Tile
Surface, grout, pattern
Tiles · boxes · costOpen calculator →06
Flooring
Rooms, m², cartons, cost
Area · boxes · costOpen calculator →07
Board Foot
Rough lumber dimensions
Board feet · costOpen calculator →08
Mulch & Gravel
Beds, paths, depth
Volume · bags · bulkOpen calculator →09
Drywall
Walls, ceilings, openings
Sheets · screws · mudOpen calculator →10
Fence
Runs, posts, pickets
Posts · pickets · concreteOpen calculator →11
Paver
Patios, walkways, base
Pavers · base · sandOpen calculator →12
Roofing
Footprint, pitch, bundles
Bundles · underlaymentOpen calculator →13
Deck
Boards, joists, posts
Boards · joists · concreteOpen calculator →How it works
Three steps from tape measure to checkout.
- 1.Choose your project
Select a specialized calculator.
- 2.Enter dimensions
Use real measurements and product assumptions.
- 3.Get a material ticket
Review exact need and purchase quantity.
Material ticket
12 × 14 ft patio slab
- Dimensions
- 12 × 14 ft · 4 in depth
- Exact volume
- 2.07 yd³
- Planning allowance
- 10%
- Recommended order
- 2.28 yd³
Example only. Supplier delivery increments may vary.
Built for a second look
Transparent assumptions. Local calculations. Useful limitations.
- No account required
- US and metric units
- Editable planning allowance
- Product labels take priority
Common questions
Before you place the order.
Why include an allowance?
Cuts, texture, spills, breakage, and touch-ups can require more material than the clean geometric amount.
Can I use metric units?
Yes. Unit switching preserves the same physical measurement while changing the displayed values.