30 tools
Energy & Appliances Calculators
Estimate electricity use, charging time, equipment size, operating cost and energy savings.
Appliance Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for an appliance.
Air Conditioner Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for an air conditioner.
Space Heater Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for a space heater.
Ceiling Fan Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for a ceiling fan.
Dehumidifier Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for a dehumidifier.
Pool Pump Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for a pool pump.
Refrigerator Electricity Cost CalculatorEstimate monthly and annual electricity use and cost for a refrigerator.
Electric Dryer Cost CalculatorEstimate monthly and annual electricity use and cost for an electric dryer.
Electric Water Heater Cost CalculatorEstimate monthly and annual electricity use and cost for an electric water heater.
Standby Power Cost CalculatorEstimate monthly and annual electricity use and cost for standby electronics.
EV Home Charging Cost CalculatorEstimate the electricity and cost required to add a given amount of energy to an EV battery at home.
EV Charging Time CalculatorEstimate how long an EV charge will take from starting state of charge to target state of charge.
Solar Payback CalculatorEstimate simple payback time and lifetime net savings for a solar project.
Home Battery Runtime CalculatorEstimate how long a home battery can support a steady electrical load.
Generator Fuel Cost CalculatorEstimate generator fuel gallons and operating cost from burn rate and runtime.
Generator Size CalculatorEstimate a generator wattage target from total running load and the largest startup surge.
LED Lighting Savings CalculatorEstimate electricity and dollar savings from replacing higher-wattage bulbs with LEDs.
Heat Pump vs Electric Heat Savings CalculatorCompare annual electricity cost for a heat pump versus electric resistance heating.
Mini-Split Size CalculatorEstimate a rough mini-split cooling capacity range from floor area, ceiling height and climate load.
Window AC Size CalculatorEstimate a rough window-air-conditioner BTU target from room size, ceiling height and sun exposure.
Electricity Bill CalculatorEstimate a monthly electricity bill from kWh usage, energy rate and fixed fees.
Appliance kWh CalculatorEstimate appliance electricity use in kWh from wattage and runtime.
Solar Panel Quantity CalculatorEstimate how many solar panels are needed to target a daily energy output.
Solar Panel Output CalculatorEstimate daily and annual solar energy from panel count, rating and sun hours.
Solar Battery Size CalculatorEstimate battery capacity needed for a target backup duration and average load.
Portable Power Station Runtime CalculatorEstimate runtime from battery watt-hours, usable capacity and load.
UPS Runtime CalculatorEstimate UPS battery runtime from usable watt-hours and connected load.
Level 1 vs Level 2 EV Charging CalculatorCompare estimated charging time for Level 1 and Level 2 charging.
EV Charging Loss CalculatorEstimate wall energy and lost energy from a chosen EV charging-loss percentage.
EV Charger Amperage CalculatorEstimate current draw from EV charging power and voltage.