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Cleaning, repairs, heating and cooling, and lowering your energy bill.

Calculators

  • Appliance electricity cost calculator

    Add your devices and your electricity rate to see what each one costs per hour, month and year.

  • Paint calculator

    Enter room size, doors, windows and coats to see how many gallons of paint to buy, with a gallons-plus-quarts option.

  • Dehumidifier size calculator

    Get the ENERGY STAR pint size for your square footage and dampness level, plus the monthly cost to run the dehumidifier.

  • AC BTU calculator

    Find the BTU/h a room air conditioner needs from the ENERGY STAR chart, adjusted for sun, people and kitchen use.

  • Christmas lights cost calculator

    Add light strands, inflatables and projectors to see watts, cost per night and per season, and whether one 15-amp circuit can carry it.

  • Concrete bag calculator

    Cubic feet, cubic yards and the number of 40/50/60/80 lb concrete bags for a slab, post holes or round tube forms.

  • Shower cost calculator

    What one shower costs in water plus water heating, electric or gas, per shower and per year, with 2.5 vs 2.0 gpm savings.

  • Roofing calculator

    Turn house footprint and roof pitch into roof area, squares and shingle bundles to buy, with editable waste and bundles per square.

  • Water leak cost calculator

    See how many gallons a dripping faucet or running toilet wastes and what it costs per month and year at your water rate.

  • Attic insulation calculator

    Enter your climate zone and current attic insulation to see your R-value, the ENERGY STAR target and inches to add.

Guides