Home cost calculators

Free calculators for running a home and planning projects. The energy tools load each state's latest official electricity price; the project tools work in feet or meters.

Energy and bills

• Electric bill calculatorEstimate a monthly bill from your usage and your state's current rate.
• Appliance energy cost calculatorWhat an AC, space heater or dryer costs to run per hour and per month.
• EV charging cost calculatorHome charging cost per month and per 100 miles, compared with a gas car.
• Solar payback calculatorYears to pay back a rooftop system, using NLR PVWatts output for your state.

Home projects

• Concrete calculatorCubic yards and 40, 60 or 80 lb bags for a slab, patio or footing.
• Gravel, mulch and topsoil calculatorCubic yards, tons and bags for gravel, sand, topsoil or mulch.
• Paint calculatorGallons or liters for a room's walls and ceiling, minus doors and windows.
• Drywall calculatorHow many 4×8, 4×10 or 4×12 sheets a room needs, plus screws.
• Flooring and tile calculatorSquare footage plus waste, and how many boxes to buy.
• Roofing calculatorRoof area from the footprint and pitch, in squares and shingle bundles.