💡 Electricity Bill Calculator

This electricity bill calculator estimates your daily and monthly electricity cost by adding up the energy usage of each appliance in your home — its wattage, how many hours a day it runs, and how many of that appliance you have. It's built for anyone who wants to understand where their electricity bill comes from, spot which appliances cost the most to run, or estimate the cost impact of adding a new device.

How It Works

For each appliance, the calculator computes daily energy use in kilowatt-hours as Wattage × Quantity × Hours per Day ÷ 1000. It sums the daily kWh across every appliance you've added, multiplies by 30 to get an estimated monthly kWh figure, and multiplies that by your electricity rate per kWh (in your chosen currency) to get the total monthly cost. Each appliance's individual daily and monthly kWh and cost are shown in the breakdown table so you can see which devices contribute the most.

Why It Matters

Electricity bills can be confusing because usage isn't itemized by device on most statements. Breaking usage down by appliance — refrigerator, air conditioner, water heater, and so on — makes it easy to spot the biggest contributors and estimate potential savings from running high-wattage appliances less often or upgrading to more efficient models.

Tips for Accurate Results

• Use your appliance's actual wattage from its nameplate or manual rather than a rough guess — wattage varies significantly between models and brands.
• Remember this estimate assumes constant daily usage — seasonal appliances like air conditioners or heaters should reflect only the months they're actually used.
• Check your utility bill for your actual per-kWh rate, since rates vary widely by region and may include tiered pricing not reflected in a single flat rate.
• Add standby/phantom loads for always-plugged-in electronics if you want a more complete picture — many devices draw small amounts of power even when off.