Home Improvement and Measuring Calculators

Measure once, buy the right amount. Work out square footage (even from a photo of a floor plan), how many bags of concrete, yards of mulch or gravel, or gallons of paint a project needs, what an appliance costs to run, and convert temperatures, heights, weights and any other unit along the way.

22 free calculators · no sign-up

Most used

Projects and materials

Area, concrete, paint, mulch and gravel for the job.

Square Footage CalculatorMeasure rooms, or upload a floor plan to total it.Concrete CalculatorCubic yards for a slab, footing or steps.Lumber / Decking CalculatorBoard feet and number of boards for a deck or floor.Gallons per Minute CalculatorFlow rate from volume and time.Paint CalculatorGallons of paint for a room.Mulch, Gravel and Soil CalculatorCubic yards, bags and tons of mulch, gravel or soil.Tile CalculatorTiles and boxes for a floor or wall, with grout and waste.Flooring CalculatorBoxes of laminate, vinyl, hardwood or carpet yards.Drywall CalculatorDrywall sheets for a room's walls and ceiling.Wallpaper CalculatorRolls of wallpaper by strips, with pattern repeat.Fence CalculatorPosts, rails, pickets and concrete for a wood fence.Roofing CalculatorRoof area, squares and shingle bundles from pitch.Board Foot CalculatorBoard feet and cost for lumber and hardwood.Cubic Yard CalculatorCubic yards, cubic feet and bags for any area.Pool Volume CalculatorGallons in a rectangle, round or oval pool.

Energy

What your appliances cost to run, and the right AC size.

Electricity Cost CalculatorWhat an appliance costs to run per day, month and year.BTU Calculator (AC Size)What size air conditioner a room needs, in BTUs.

Measuring

Every common unit, converted.

Unit ConverterLength, weight, volume, temperature, area and speed.Temperature ConverterCelsius, Fahrenheit, Kelvin and Rankine, all at once.Height ConverterFeet and inches to centimeters and back, with a chart.Kg to Lbs ConverterKilograms to pounds, pounds to kilograms, and stone.Cooking Measurement ConverterCups to grams and back, for 18 baking ingredients.

Questions about home and measuring calculators

How much extra material should I buy?

About 10% for concrete, flooring and tile to cover waste, cuts and uneven ground. For paint, round up to the next quart rather than run out mid-wall.

How do I find square footage of an odd-shaped room?

Split it into rectangles, work out each one's length × width, and add them up. The square footage calculator can do this for several rooms at once.

🏠 Home Improvement and Measuring Calculators