20 calculators
Home & Utilities
Solar, batteries, utilities, maintenance, housing costs, and home ownership math.
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Solar Panel Payback CalculatorEstimate solar panel payback period from project cost, incentives, production, utility rate, and degradation.Home Battery Backup Runtime CalculatorEstimate how long a home battery can run selected loads during an outage.Appliance Electricity Cost CalculatorEstimate appliance electricity cost from watts, daily use, duty cycle, and utility rate.
All home & utilities calculators
Solar Panel Payback CalculatorEstimate solar panel payback period from project cost, incentives, production, utility rate, and degradation.Home Battery Backup Runtime CalculatorEstimate how long a home battery can run selected loads during an outage.Appliance Electricity Cost CalculatorEstimate appliance electricity cost from watts, daily use, duty cycle, and utility rate.Generator Sizing CalculatorEstimate recommended generator size from running watts, largest start surge, and a safety margin.HVAC Filter Replacement CalculatorEstimate annual HVAC filter quantity and cost from filter count, replacement interval, and price.Water Softener Salt Usage CalculatorEstimate water softener salt use and monthly cost from water use, hardness, resin efficiency, and bag price.Home Internet Bandwidth CalculatorEstimate recommended home internet download and upload speed from streaming, calls, gaming, and smart devices.Heat Pump Savings CalculatorEstimate annual heating cost savings from switching to a heat pump using user-entered fuel, efficiency, COP, and electric rate.Gas vs Electric Appliance Cost CalculatorCompare annual gas and electric appliance operating costs from user-entered energy use and utility rates.Home Office Electricity Cost CalculatorEstimate monthly home office electricity cost from computer, monitor, accessory, and workday assumptions.Refrigerator Running Cost CalculatorEstimate refrigerator running cost from wattage, duty cycle, and electricity rate.Window Replacement ROI CalculatorEstimate window replacement payback and ROI from project cost, incentives, energy savings, maintenance savings, and resale value.Insulation Savings CalculatorEstimate insulation upgrade savings and payback from annual heating/cooling cost, reduction percent, project cost, and incentives.Property Tax Estimate CalculatorEstimate annual and monthly property tax from assessed value, tax rate, exemptions, and fixed assessments.HOA Affordability CalculatorEstimate whether HOA dues fit a target housing budget ratio alongside mortgage, taxes, insurance, and debts.Rent vs Buy with Maintenance CalculatorCompare renting and buying over a planning period with mortgage, taxes, insurance, HOA, maintenance, rent growth, and appreciation.Mortgage Recast CalculatorEstimate new monthly payment and savings after a mortgage recast lump-sum principal payment.Biweekly Mortgage Payoff CalculatorEstimate interest savings and time saved by making half-payments every two weeks instead of standard monthly mortgage payments.Home Emergency Fund CalculatorEstimate a home emergency fund target from monthly housing costs, repair reserve, insurance deductible, and cushion months.Home Energy Savings PlannerPlan home energy upgrades from current usage, upgrade cost, savings, incentives, and payback.