Home & DIY Calculators

Material and project calculators for homeowners and DIYers. Ten tools are live — each ships with its formula, worked examples and an FAQ, following the same template as the concrete calculator. More are added weekly.

Concrete & masonry

Live
Concrete Bag Calculator

Answers "how many bags of concrete do I need?" for slabs, footings and post holes.

Live
Concrete Yards Calculator

Ready-mix cubic yards and cost for slabs, footings and columns.

Live
Gravel Calculator

Cubic yards and tons for driveways, paths and slab bases.

Live
Sand Calculator

Tons and 50 lb bags for bases, sandboxes, pools and masonry.

Yard & landscape

Live
Mulch Calculator

Bags and cubic yards by bed size and depth, with bag-vs-bulk costs.

Live
Paver Calculator

Pavers plus base gravel and bedding sand for patios and paths.

Interior projects

Live
Drywall Calculator

4×8, 4×10 and 4×12 sheet counts for walls and ceilings, by room.

Live
Shower Tile Calculator

How much tile for a shower — walls, floor, tiles and boxes.

Live
BTU Calculator for Rooms & Garages

BTU sizing for AC and garage heaters, corrected for insulation and climate.

Lumber & comfort

Live
Board Foot Calculator

Board feet and lumber cost from board dimensions and price per board foot.

Tools follow the Phase-0 cluster research: queries were chosen because real people type them (they appear in Google's own suggestions) and because the pages currently ranking for them are mostly small independent tools — questions a careful new calculator can genuinely answer better.