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Home Improvement Calculators

Browse 8 tools, including Concrete Calculator, BTU Calculator, Square Footage Calculator.

Concrete Calculator

Estimate rectangular material volume, ordering allowance, mass and bag count from your supplied yield.

Estimate room-air-conditioner capacity using the ENERGY STAR area chart.

Calculate rectangular floor or surface area in square meters and square feet.

Divide a total rise into equal risers and calculate a straight stair run.

Estimate sloped roof area from horizontal footprint and a uniform roof pitch.

Estimate tiles and boxes for a rectangular surface using a conservative straight-grid layout.

Estimate rectangular material volume, ordering allowance, mass and bag count from your supplied yield.

Estimate rectangular material volume, ordering allowance, mass and bag count from your supplied yield.

8 working tools. Each page explains its inputs, formula and assumptions.