Home and energy
Household energy, utilities, solar, heating and home project calculators. Every page below is currently a stub: the working tool, its formula and its worked example are published one calculator at a time, and a page is listed in the index allowlist only once it is finished.
129 calculators in 10 subjects.
Batteries
- Battery Amp Hour to Kilowatt Hour Converterstub
- Battery Arbitrage Savings Calculatorstub
- Battery Bank Sizing Calculatorstub
- Battery Charging Time Calculatorstub
- Battery Runtime Calculatorstub
- Home Battery Backup Duration Calculatorstub
- Inverter Sizing Calculatorstub
- Wire Size for Low Voltage DC Runs Calculatorstub
Carbon footprint
- Business Travel Emissions Calculatorstub
- Car Carbon Emissions per Mile Calculatorstub
- Carbon Offset Cost Calculatorstub
- Carbon Price and Emissions Cost Calculatorstub
- Cryptocurrency Transaction Energy and Emissions Calculatorstub
- Data Center and Cloud Workload Emissions Calculatorstub
- Diet Carbon Footprint Calculatorstub
- Electric Vehicle Lifetime Carbon Break Even Calculatorstub
- Electricity Carbon Emissions Calculatorstub
- Employee Commute Emissions Calculatorstub
- Home Heating Fuel Emissions Comparison Calculatorstub
- Household Carbon Footprint Calculatorstub
- Net Zero Reduction Pathway Calculatorstub
- Product Carbon Footprint per Unit Calculatorstub
- Website and Digital Carbon Footprint Calculatorstub
Electricity use
- Air Conditioner Running Cost Calculatorstub
- Amps, Volts and Watts Converterstub
- Appliance Electricity Cost Calculatorstub
- Electric Water Heater Cost Calculatorstub
- Electricity Bill Estimator from Appliance Liststub
- Generator Fuel Consumption and Cost Calculatorstub
- Generator Sizing and Run Time Calculatorstub
- Heat Pump Water Heater Payback Calculatorstub
- Light Bulb Energy Savings Calculatorstub
- Phantom Load and Standby Power Cost Calculatorstub
- Pool Pump Energy Cost Calculatorstub
- Space Heater Running Cost Calculatorstub
- Time of Use Tariff Savings Calculatorstub
- Watts to Kilowatt Hours Converterstub
- Whole Home Energy Use Intensity Calculatorstub
EV charging
- EV Charger Circuit and Amperage Calculatorstub
- EV Charging Cost per Charge and per Mile Calculatorstub
- EV Home Charging Time Calculatorstub
- Home Electrical Panel Capacity for an EV Charger Calculatorstub
- Level 1 versus Level 2 Charging Comparison Calculatorstub
- Solar and EV Charging Offset Calculatorstub
Gas and fuel
- Cost per Million BTU Fuel Comparison Calculatorstub
- Heating Oil Consumption and Cost Calculatorstub
- Natural Gas Bill Estimatorstub
- Natural Gas Therms to kWh and Cubic Feet Converterstub
- Pellet Stove Fuel Consumption Calculatorstub
- Propane Tank Usage and Refill Calculatorstub
- Propane versus Natural Gas Cost Comparisonstub
- Wood Stove Cord Requirement Calculatorstub
Heating and cooling
- Air Conditioner Size in Tons Calculatorstub
- Bathroom and Kitchen Exhaust Fan CFM Calculatorstub
- Blower Door ACH50 and Air Leakage Calculatorstub
- Ceiling Fan Size and Airflow Calculatorstub
- Dehumidifier Size and Pint Capacity Calculatorstub
- Ductwork Size and CFM Calculatorstub
- Furnace Size and BTU Input Calculatorstub
- Heat Pump Sizing and Balance Point Calculatorstub
- Heat Pump versus Furnace Operating Cost Calculatorstub
- Heating and Cooling BTU Requirement Calculatorstub
- Heating Degree Days and Cooling Degree Days Calculatorstub
- Humidifier Output and Winter Window Condensation Calculatorstub
- Manual J Style Heat Loss Calculatorstub
- Weather Normalized Energy Use Calculatorstub
- Whole House Ventilation Rate Calculatorstub
Home and garden
- Air Conditioner BTU Sizing Calculatorstub
- Appliance Running Cost Comparison Calculatorstub
- Board Feet And Lumber Calculatorstub
- Brick And Block Quantity Calculatorstub
- Carpet Quantity And Roll Cutting Calculatorstub
- Chicken Coop And Flock Sizing Calculatorstub
- Concrete Volume Calculatorstub
- Deck Material Calculatorstub
- Drywall And Plasterboard Calculatorstub
- Firewood Cord And Heat Value Calculatorstub
- Flooring Quantity Calculatorstub
- Grass Seed Quantity Calculatorstub
- Gravel And Aggregate Calculatorstub
- Gutter And Downpipe Sizing Calculatorstub
- Home Renovation Cost Estimatorstub
- Insulation Quantity Calculatorstub
- Irrigation Water Requirement Calculatorstub
- Lawn Fertilizer Application Rate Calculatorstub
- Mortar And Render Quantity Calculatorstub
- Mulch And Topsoil Volume Calculatorstub
- Picture Hanging And Wall Layout Calculatorstub
- Plant Spacing And Quantity Calculatorstub
- Pool Chemical Dosing Calculatorstub
- Pressure Washer And Hose Flow Calculatorstub
- Propane And Heating Oil Consumption Calculatorstub
- Rainwater Harvesting Yield Calculatorstub
- Roof Solar Panel Count And Layout Calculatorstub
- Roofing Material And Pitch Calculatorstub
- Septic Tank And Drain Field Sizing Calculatorstub
- Skip And Dumpster Size Calculatorstub
- Stair Rise And Run Calculatorstub
- Swimming Pool Volume Calculatorstub
- Television Size And Viewing Distance Calculatorstub
- Tile Quantity Calculatorstub
- Window And Glazing Area Calculatorstub
Insulation payback
Solar
- Net Metering and Export Credit Calculatorstub
- Off Grid Solar Array and Autonomy Calculatorstub
- Solar Charge Controller Sizing Calculatorstub
- Solar Panel Count and Roof Area Calculatorstub
- Solar Panel System Size Calculatorstub
- Solar Panel Tilt Angle Optimizerstub
- Solar Payback Period Calculatorstub
- Solar Production Estimate Calculatorstub
- Solar Shading Loss Calculatorstub
- Solar String Voltage and Inverter Match Calculatorstub
Water
- Home Water Usage Calculatorstub
- Leak and Dripping Faucet Water Cost Calculatorstub
- Low Flow Fixture Savings Calculatorstub
- Running Toilet Water Loss Calculatorstub
- Septic Tank Size and Pump Out Frequency Calculatorstub
- Shower Water and Energy Cost Calculatorstub
- Tankless Water Heater Sizing Calculatorstub
- Water Bill Estimatorstub
- Water Heater Size and First Hour Rating Calculatorstub
- Water Softener Size and Salt Usage Calculatorstub
- Well Pump and Pressure Tank Sizing Calculatorstub