Estimate your home's electricity consumption and monthly bill using appliance power, daily usage and your electricity rate.
Add appliances and enter their quantity, power rating and daily usage.
Estimate your electricity consumption and monthly power bill with the free DommyTools Electricity Bill Calculator. Add your household appliances, enter their power rating and daily usage, then enter your electricity rate to get an estimated monthly cost.
The calculator can help you estimate the electricity usage of individual appliances or multiple appliances in your home, office or other space.
An electricity bill calculator estimates energy consumption from appliance power ratings and usage time. The estimated consumption is then multiplied by the electricity rate to calculate an approximate bill.
Electricity consumption is commonly measured in kilowatt-hours (kWh), also known as units of electricity.
The monthly estimate uses a 30-day billing period. Your actual billing cycle may differ.
Estimate electricity consumption in kWh or units.
Calculate an approximate monthly electricity cost.
Estimate how much electricity your appliances use each month.
See which appliances contribute most to your electricity usage.
Actual power consumption varies by appliance model, efficiency, operating mode and usage. The values below are general estimates.
| Appliance | Typical Power |
|---|---|
| LED Bulb | 5–20 Watts |
| Ceiling Fan | 50–80 Watts |
| LED TV | 60–150 Watts |
| Refrigerator | 100–400 Watts |
| Air Conditioner | 800–2500 Watts |
| Water Heater | 1000–3000 Watts |
| Washing Machine | 400–1500 Watts |
| Laptop/Desktop | 40–350 Watts |
Identify appliances that use significant amounts of electricity.
Get an approximate idea of your monthly electricity cost.
Compare estimated consumption between different appliances.
Calculate electricity usage without registration.
Yes. You can use the calculator to estimate electricity consumption and costs without registration.
One unit of electricity is equal to one kilowatt-hour (1 kWh). For example, using a 1000-watt appliance for one hour consumes approximately one unit.
Yes. Remove the other appliances or add only the appliance you want to evaluate, then enter its wattage and daily usage.
No. The calculator provides an estimate based on appliance power, usage and the electricity rate you enter. Actual bills can vary because of tariff slabs, taxes, fixed charges, subsidies and other adjustments.
Yes. You can add multiple appliances and use their estimated power consumption to calculate household or office electricity usage.