Appliance Wattage
Calculate daily and monthly electricity consumption and cost of your household appliances. Free online energy usage calculator with per-appliance breakdowns.
Appliances
About This Calculator
The Appliance Wattage Calculator helps you estimate the total electricity consumption of your household appliances and calculate the associated cost. Whether you are planning your monthly budget, comparing appliance efficiency, or trying to reduce your electricity bill, this calculator gives you a clear breakdown of energy usage across all your devices.
The calculator uses the standard formula: Energy (kWh) = Power (Watts) × Quantity × Hours Used ÷ 1000. Daily energy consumption is summed across all appliances and multiplied by 30 to estimate monthly usage. The total cost is then computed by multiplying the kWh consumption by your local electricity rate per kWh.
Each appliance's wattage rating is typically printed on the back or bottom of the device or listed in its user manual. These ratings represent the maximum power draw; actual consumption may vary based on age, condition, and operating settings.
Regional Notes
India: Average residential electricity rate is about ₹8 per kWh, though rates vary by state ranging from ₹5 in Himachal Pradesh to ₹11 in Maharashtra. The Bureau of Energy Efficiency (BEE) star rating system helps identify energy-efficient appliances.
United States: The average residential rate is approximately $0.12 per kWh, ranging from $0.10 in some states to over $0.30 in Hawaii and New England. The Energy Star program identifies efficient appliances.
United Kingdom: The average rate is approximately £0.28 per kWh with rates varying by supplier. Energy efficiency ratings (A+++ to G) are standard on all appliances. The Energy Price Guarantee provides a baseline for pricing.
Frequently Asked Questions
How do I calculate my household electricity consumption?
Multiply each appliance's wattage by the number of devices, multiply by daily usage hours, divide by 1000 to get kWh per day, then sum across all appliances. Multiply by 30 for monthly consumption.
How much electricity does a ceiling fan use per day?
A typical 75W ceiling fan running 8 hours per day consumes 0.6 kWh per day. Running 30 days a month, that is 18 kWh costing about ₹144 in India, $2.16 in the US, or £5.04 in the UK depending on your local electricity rate.
What is the formula for calculating electricity consumption?
Energy (kWh) = Power (Watts) × Quantity × Hours Used / 1000. Total cost = Total kWh × Electricity rate per kWh. Monthly values use 30 days.
How can I reduce my electricity bill?
Replace incandescent bulbs with LED bulbs, use energy-efficient appliances with 5-star BEE ratings, unplug devices on standby, use fans instead of AC when possible, and run high-power appliances like washing machines during off-peak hours.
What is the average electricity rate in India, USA, and UK?
As of 2025, average residential electricity rates are approximately ₹8 per kWh in India, $0.12 per kWh in the United States, and £0.28 per kWh in the United Kingdom. Rates vary by state, region, and utility provider.
How many watts does a typical household appliance use?
Common appliance wattages: LED bulb 8–12W, ceiling fan 55–100W, refrigerator 150–400W, AC 1500–5000W, water heater 3000–4500W, microwave 800–1500W, washing machine 500–1500W, TV 50–200W, laptop 30–100W.
Can I use this calculator for any country?
Yes, this calculator works for any country. Simply enter your local electricity rate per kWh. Default rates are set for India (₹8), US ($0.12), and UK (£0.28) but you can adjust them to your local rate.
What does kWh mean?
kWh (kilowatt-hour) is a unit of energy equal to 1,000 watt-hours. It represents the energy consumed by a 1,000-watt appliance running for one hour. Electricity bills are typically measured in kWh.