Home & DIY Calculators
Room, paint and material estimates.
Estimate how many gallons of paint you need for a room based on wall area.
Open →Calculate area in square feet for rooms and projects, plus total material cost.
Open →Work out what any appliance costs to run — per day, month and year — from its wattage and your electricity rate.
Open →Estimate how many solar panels you need, the system size and cost, and the payback period — worked back from your power bill, with the 30% tax credit.
Open →Turn your floor-to-floor rise into a buildable staircase — number of steps, riser height, total run and stringer length, with code checks.
Open →Estimate how many drywall sheets you need for a room's walls and ceiling, plus joint compound, tape, screws and cost — with waste included.
Open →Work out how much insulation you need — R-value to add, layer thickness, number of rolls, batts or bags, and the material cost, with waste included.
Open →Estimate the concrete you need for a slab in cubic yards, cubic feet and bags.
Open →Estimate how many tiles and boxes you need for a floor or wall, with waste.
Open →Estimate the gravel, mulch, sand or soil you need for a project in cubic yards, cubic feet and tons — from the area and depth you enter.
Open →Estimate the BTUs needed to cool or heat a room from its square footage, adjusted for sunlight, occupancy and climate, to size an AC or heater.
Open →Work out the flooring area and number of boxes you need, including waste.
Open →Estimate your roof's surface area from its footprint and pitch, then the roofing squares, shingle bundles, underlayment and cost you need — waste included.
Open →Work out how many deck boards, joists and screws you need for your deck size, board width and joist spacing — waste and cost included.
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