Energy, Electricity & Utilities Cost Calculators
Calculate electric appliance costs, kWh consumption, solar panel savings and payback, natural gas heating, portable generator runtimes, and water utility bills with 40 free energy calculators.
Calculate home electricity bills, air conditioner and heat pump operating costs, solar panel payback and 30% federal clean energy tax credits, backup generator fuel consumption, and water/sewer utility rates with our 40 free energy and utility calculators.
Live Interactive Calculators (40)
Ready for instant calculation with step-by-step formulas
Electricity Cost Calculator
Calculate electric bill costs and appliance energy consumption by kWh or wattage with US electricity rates.
Water Bill Calculator
Estimate monthly residential water and sewer utility bills by gallons, CCF, or cubic meters.
Natural Gas Cost Calculator
Calculate residential natural gas utility bills in Therms, CCF, or MMBtu with customer charges and BTU conversions.
Water Heater Cost Calculator
Estimate daily, monthly, and annual hot water heating costs by direct energy consumption or modeled water volume demand.
EV Charging Cost Calculator
Calculate electric car home and public charging costs based on battery capacity, rates, and efficiency.
Solar Panel Payback Period Calculator
Estimate solar investment payback, federal tax credits, and annual utility bill savings.
Electricity Usage Calculator
Calculate daily, monthly, and annual kilowatt-hour (kWh) electricity usage based on equipment wattage, daily operating hours, and power factor.
Appliance Electricity Cost Calculator
Calculate the running cost of individual household appliances, accounting for cycling duty cycles, operating hours, and your local electricity rate.
Energy Consumption Calculator
Calculate electrical energy consumption across hours, days, weeks, and months with conversions into kWh, Watt-hours, Joules, and British Thermal Units (BTU).
kWh Cost Calculator
Calculate the total cost of any quantity of kilowatt-hours (kWh) across hours, days, months, and years at your exact utility rate.
Electricity Bill Estimator
Estimate your complete monthly residential electric utility bill, separating supply generation, distribution delivery, fixed customer fees, and local taxes.
Monthly Electricity Cost Calculator
Calculate monthly electricity expenses with seasonal heating and cooling adjustments, square-foot benchmarking, and annual expenditure projections.
Standby Power Cost Calculator
Calculate the hidden cost of vampire power and phantom loads drawn by TVs, gaming consoles, microwave clocks, smart speakers, and chargers while turned off.
Air Conditioner Running Cost Calculator
Calculate the cost to run window, portable, and central air conditioners using electrical wattage or cooling capacity (BTU/hr) and SEER energy efficiency ratings.
Heater Running Cost Calculator
Calculate the hourly, daily, and monthly cost of running electric space heaters, ceramic heaters, infrared units, and oil-filled radiators with thermostat cycling.
HVAC Energy Cost Calculator
Calculate combined annual heating and cooling costs for residential HVAC systems across heat pumps, electric furnaces, and high-efficiency natural gas heating.
Heat Pump Cost Calculator
Calculate operating costs for air-source heat pumps, factoring in modern SEER2 and HSPF2 efficiency ratings, coefficient of performance (COP), and backup aux heat strips.
Propane Cost Calculator
Calculate residential and commercial propane heating fuel costs, tank refill requirements, and cost per million BTU (MMBtu) based on gallons consumed.
Heating Oil Cost Calculator
Calculate fuel oil expenses for boilers and furnaces, estimating seasonal gallon consumption, delivery charges, boiler efficiency, and cost per useful million BTU.
Solar Panel Savings Calculator
Calculate your monthly and 25-year cumulative electric bill savings from residential solar panels, factoring in utility rate inflation and optional loan financing.
Solar System Cost Calculator
Calculate the gross quote price and net out-of-pocket investment for home solar systems, including the 30% federal clean energy tax credit (ITC) and local rebates.
Solar Energy Production Calculator
Calculate daily, monthly, and annual kilowatt-hour (kWh) solar electricity generation using system capacity, regional peak sun hours, and performance derate ratios.
Solar Panel Output Calculator
Calculate electrical output per individual solar panel and total rooftop array, accounting for panel wattage, tilt orientation, soiling, and temperature loss.
Home Battery Storage Cost Calculator
Calculate equipment, installation, and net costs for home energy storage systems (Tesla Powerwall, Enphase, FranklinWH), with 30% federal tax credit deductions.
Battery Backup Runtime Calculator
Calculate how many hours or days your home battery or portable power station will power essential household appliances during a blackout.
Solar vs Grid Electricity Cost Calculator
Compare 25-year Levelized Cost of Energy (LCOE) between clean rooftop solar and escalating electric utility grid rates.
Generator Running Cost Calculator
Calculate fuel and maintenance operating costs for portable and whole-house standby generators using gasoline, diesel, propane, or natural gas.
Generator Fuel Consumption Calculator
Calculate total gallons required and runtime per full fuel tank across 25%, 50%, 75%, and 100% generator electrical loads.
Generator Size Calculator
Calculate the recommended generator wattage capacity (running and starting surge watts) needed to power your home during an emergency blackout.
Gasoline Cost Calculator
Calculate fuel purchase and storage expenses for power equipment, lawn mowers, outboard marine engines, and fuel cans, including stabilizer additives.
Diesel Fuel Cost Calculator
Calculate fuel expenses for diesel generators, agricultural machinery, and heavy equipment, supporting on-road and tax-exempt off-road dyed diesel.
Propane Generator Cost Calculator
Calculate operating costs and runtime for dual-fuel and dedicated propane generators across 20 lb BBQ tanks, 100 lb cylinders, and residential bulk tanks.
Battery Charging Cost Calculator
Calculate the electricity cost to recharge power stations, e-bike batteries, cordless power tools, and portable electronics, factoring in charger efficiency losses.
Water Usage Cost Calculator
Calculate residential and commercial water utility expenses, converting between gallons, cubic feet, CCF, and liters with separate water supply and sewer treatment rates.
Hot Water Usage Cost Calculator
Calculate daily, monthly, and annual hot water heating costs across electric resistance, hybrid heat pump, natural gas, and propane water heaters.
Utility Cost Comparison Calculator
Compare competing retail electricity providers, utility rate plans, fixed customer fees, and contract terms side-by-side to find the lowest annual cost.
Electricity Rate Comparison Calculator
Compare flat-rate electricity pricing against Time-of-Use (TOU) on-peak and off-peak tariffs, calculating your break-even on-peak threshold.
Energy Cost Per Hour Calculator
Calculate instant electricity costs per minute, per hour, per 8-hour workday shift, and per 24-hour day for any equipment wattage.
Energy Savings Calculator
Calculate monthly and annual dollar savings, percentage energy reduction, and payback periods from upgrading to energy-efficient appliances, LEDs, or heat pumps.
Utility Bill Split Calculator
Split electric, gas, water, and internet bills fairly between roommates or family members equally, by bedroom square footage, or by custom percentage shares.
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