Appliance Wattage Calculator

Appliance Wattage Calculator. Enter your appliance name, wattage, quantity, and daily usage hours to calculate your monthly electricity consumption (kWh) and estimated monthly cost. Set your local electricity rate ($/kWh) to get a personalized cost breakdown. The results show total energy use, monthly spend, and a visual split of consumption across your appliances. Also try the Dilution Ratio Calculator.

Results

Estimated Monthly Cost

Total Monthly Consumption

Total Daily Consumption

Estimated Annual Cost

Total Connected Wattage

Results Table

How do I find the wattage of my appliance?

Most appliances have a label on the back or bottom showing wattage (W) or amps (A) and volts (V). If you only have amps and volts, multiply them together to get watts (W = A × V). You can also check the appliance manual or look up the model number online. See also our Water Bill Calculator.

What is kWh and how is it calculated?

kWh stands for kilowatt-hour — the standard unit electric utilities use to bill you. It's calculated as: kWh = (Watts × Hours Used) ÷ 1000. For example, a 100W bulb running for 10 hours uses 1 kWh of electricity.

What is the average electricity rate in the US?

The average US residential electricity rate is around $0.13 per kWh, though rates vary widely by state — from under $0.10 in states like Louisiana to over $0.25 in Hawaii and California. Check your utility bill for your exact rate.

How can I reduce my appliance electricity costs?

The biggest savings come from reducing usage of high-wattage appliances like air conditioners, water heaters, and clothes dryers. Use energy-efficient (ENERGY STAR) replacements where possible, unplug devices on standby, and use smart power strips to eliminate phantom loads. You might also find our LED Savings Calculator useful.

Why do appliances and lighting account for such a large portion of my bill?

Appliances and lighting can account for nearly 20% of an average household's annual energy bill. High-consumption devices like refrigerators (running 24/7), HVAC systems, and water heaters are the main contributors. Tracking each appliance's usage helps identify which ones are costing the most.

What is 'standby power' and should I include it?

Standby power (also called phantom load) is the electricity devices draw even when turned off or idle — typically 1–10 watts per device. For devices like TVs, game consoles, and chargers, include their standby wattage and 24 hours/day to capture this hidden cost.

How accurate are typical wattage figures for appliances?

Typical wattage figures are averages based on common models. Actual consumption varies by brand, age, efficiency rating, and usage patterns. For the most accurate results, use a plug-in energy monitor (like Kill-A-Watt) to measure your specific appliance's real wattage.

Can I use this calculator for business or commercial appliances?

Yes — the calculator works for any electrical device regardless of setting. Commercial electricity rates differ from residential rates, so make sure to enter your actual commercial rate per kWh when calculating costs for a business environment.