🛠️ DIY & Home Improvement Calculators
Material estimates for every home project — measure once, calculate here, and buy the right amount of flooring, paint, concrete, mulch, or shingles the first time. All tools are free and run entirely in your browser.
Project Calculators
Square Footage Calculator
Room and odd-shape area with waste allowance and flooring cost — the starting point for every project here.
🎨Paint Calculator
Gallons needed from room dimensions, doors, windows, and coats, with a practical buy recommendation.
🪞Tile Calculator
Tiles and boxes for any floor or wall — 12×12 to subway to custom sizes, with layout waste.
🧱Concrete Calculator
Cubic yards and premix bags for slabs, footings, and columns, with 10% waste built in.
🌳Mulch Calculator
Cubic yards and bag counts from bed size and depth, with coverage reference.
🪨Gravel Calculator
Cubic yards and tons for crushed stone, pea gravel, river rock, sand, or topsoil.
🏚️Roofing Calculator
Roof area, roofing squares, and shingle bundles from footprint and pitch.
🪜Stair Calculator
Risers, treads, run, and stringer length from total rise, checked against IRC code.
❄️BTU Calculator
AC sizing in BTUs and tonnage from room size, insulation, sun, and occupancy.
🪵Deck Calculator
Decking boards, screws, and joists from deck size, board width, and gap.
🚧Fence Calculator
Posts, rails, pickets, and concrete bags from fence length and style.
🔲Drywall Calculator
Sheets, mud, tape, and screws for a room, with door and window deductions.
🌱Topsoil Calculator
Cubic yards, bags, and tons of soil from area and depth, with lawn presets.
🏊Pool Volume Calculator
Gallons and liters for rectangular, round, and oval pools.
🔌Voltage Drop Calculator
Wire sizing for long runs, checked against the NEC 3% recommendation.