Electricity Calculator
Add your home appliances and find out how many units of electricity you use each month and what your bill will be. See which appliance costs the most
- Daily units: watts × quantity × hours per day ÷ 1000
- Monthly units: daily units × days in month
- Bill: monthly units × rate per unit + fixed charge
- Watts are printed on the appliance label or in its manual
- A fridge or AC compressor cycles on and off, so enter the hours it actually runs (about 8 to 10 hours for a fridge)
- The result is an estimate. Your actual bill may differ because of slab rates, taxes and surcharges
Everything is calculated in your browser. Nothing is saved or sent anywhere.
Electricity Consumption Calculator FAQ
It calculates your energy use and cost with an appliance-by-appliance breakdown, so you can see what uses the most power.
- Add each appliance and its power rating in watts.
- Enter how many hours per day you use it.
- Enter the per-unit rate from your bill.
- See the usage in units and the estimated cost.
Units = (watts × hours used) ÷ 1000. For example, a 1000 W heater used for 2 hours uses 2 units.
Look at your bill or your electricity board's website. Rates differ by state, slab and connection type, so use your own rate for a closer result.
Real bills also include fixed charges, taxes, fuel adjustments and slab rates. Appliances such as ACs and fridges also run in cycles, so real usage can be lower than the full-power figure.
