Measure twice, buy once

All 30 Calculators

Every calculator runs instantly in your browser, supports metric and imperial, explains its formula and shows the full calculation breakdown. No sign-up, no invented prices.

Measurement & Planning

4 calculators

Square Footage Calculator

Add up multiple rooms and get total floor area in ft² and m².

Room Volume Calculator

Cubic feet and cubic meters of any room.

Area & Unit Converter

Convert between ft², m², yd², acres, hectares and more.

Material Waste Calculator

Turn a project area into a real purchase quantity with waste allowance.

Paint & Wall

4 calculators

Paint Calculator

Gallons or litres of paint with door and window deductions.

Primer Calculator

Seal bare drywall, wood or stains before painting.

Wallpaper Calculator

Rolls needed including pattern repeat matching.

Drywall Calculator

Sheets, tape, joint compound and screws.

Flooring & Tiling

4 calculators

Flooring Calculator

Packages, waste and estimated cost for laminate, vinyl or wood.

Tile Calculator

Tile count and boxes for floors and walls, waste included.

Grout Calculator

Grout weight from tile size, joint width and depth.

Baseboard Calculator

Linear length and piece count with door deductions.

Concrete & Construction

5 calculators

Concrete Calculator

Volume, ready-mix yards and pre-mix bag count.

Cement Calculator

Cement bags, sand and gravel by mix ratio.

Gravel Calculator

Volume and tonnage with configurable stone density.

Brick & Block Calculator

Units and mortar for walls, openings deducted.

Lumber Calculator

Board feet, linear feet and cost.

Roofing & Exterior

4 calculators

Roofing Calculator

True roof area from footprint and pitch, squares + underlayment.

Shingle Calculator

Asphalt shingle bundles and starter course.

Siding Calculator

Squares and boxes for exterior walls, openings deducted.

Gutter Calculator

Gutter sections, downspouts, hangers and fittings.

Deck & Fence

3 calculators

Deck Calculator

Decking boards, joists, screws and cost.

Fence Calculator

Posts, rails, pickets and post-hole concrete.

Stair Calculator

Risers, treads, total run and stringer length.

Landscaping & Outdoor

3 calculators

Mulch Calculator

Bags or bulk yards for garden beds.

Topsoil Calculator

Soil volume and tonnage for lawns and beds.

Paver Calculator

Paver count plus gravel base and bedding sand.

Energy & Efficiency

2 calculators

Insulation Calculator

Batt or roll packages for a target R-value.

BTU / AC Sizing Estimator

Preliminary cooling load for room air conditioners.

Project Cost

1 calculator

Home Renovation Cost Estimator

Low / average / high budget bands from YOUR rates.

Honest estimating policy

We never fabricate local construction prices. Cost calculators use your rates as inputs, with clearly labeled placeholder defaults. Structural and code-dependent outputs (stairs, decks, masonry) are preliminary estimates — not approved construction designs.