01
Common terminologyWords you will see
- Watt
- the rate at which an appliance uses power.
- kWh
- energy used over time; one billed unit equals 1 kWh.
- Load factor
- the average share of full input power actually used.
Free electricity calculators
Estimate how many electricity units an appliance or home may use and what the energy charge may cost. Enter the rate from your own bill.
15free calculators100%formulas shown
Recommended starting point
Start here Appliance Electricity Cost Calculator
Start here when you know an appliance’s watts and daily use.
A simple decision path
From one appliance to your monthly units
- Choose the question that matches your decision.
- Replace every example with a label, bill, drawing, product sheet or record value.
- Open the formula and check all hidden assumptions.
- Save or print the result, then verify the final decision.
Which tool should I use?
Match your question to a calculator
Know before you calculate
Three things to check first
Learn the terms, follow the method, then avoid the most common mistakes.
02
Worked exampleHow the logic flows
A 100 W appliance used for 5 hours a day for 30 days uses 15 kWh before any operating-factor adjustment.
03
Beginner mistakesCheck these first
Using cooling tonnage as AC electrical watts.
Treating the example ₹/kWh as a current tariff.
Comparing an energy charge with a final bill that includes other lines.
Detailed guides
Learn the method
All tools
Choose a calculator
Working shownElectricityAppliance Electricity Cost Calculator
monthly energy use and cost for any appliance
Open calculator Working shownElectricityWhole-home Electricity Consumption Calculatorappliance-wise monthly units and energy charges
Open calculator Working shownElectricityAC Electricity Bill Calculatorair-conditioner energy use without confusing cooling tonnage with input watts
Open calculator Working shownElectricity1.5-ton AC Monthly Cost Calculatora focused 1.5-ton AC scenario with editable input power and load factor
Open calculator Working shownElectricityFan Electricity Consumption Calculatorconventional, older, BLDC or custom fan running cost
Open calculator Working shownElectricityBLDC Fan Savings Calculatorsavings based only on entered conventional and BLDC wattages
Open calculator Working shownElectricityGeyser Electricity Cost Calculatorstorage or instant water-heater energy cost
Open calculator Working shownElectricityRefrigerator Electricity Cost Calculatorrefrigerator cost from the preferred BEE-label annual consumption
Open calculator Working shownElectricityAir Cooler Electricity Cost Calculatorair-cooler fan and pump energy
Open calculator Working shownElectricityWashing Machine Electricity Cost Calculatorwashing-machine energy per cycle and monthly cost
Open calculator Working shownElectricityInduction Cooktop Cost Calculatorinduction cooking energy at the selected power and operating factor
Open calculator Working shownElectricityWater-pump Electricity Cost Calculatormotor energy from horsepower, efficiency and run time
Open calculator Working shownElectricityTelevision Electricity Cost Calculatortelevision viewing and optional standby energy
Open calculator Working shownElectricityComputer Electricity Cost Calculatorlaptop, desktop and monitor energy together
Open calculator Working shownElectricityEV Home-charging Cost Calculatorgrid energy and cost for an electric-vehicle battery refill
Open calculatorTwo-minute explanation
Watts and electricity units are different
Watts show how quickly an appliance uses power. kWh shows the total energy used over time. One kWh is one billed electricity unit.
Common questions
Before you calculate
Why is the electricity rate editable?
Electricity tariffs differ by state, provider, slab, connection type and billing period. Enter the effective energy rate from your own bill; the example is not an India-wide tariff.
Does one unit mean one kWh?
Yes. One billed electricity unit equals one kilowatt-hour, or 1 kWh, of energy.
Why can the real bill be higher?
The calculator estimates the energy-charge portion from the values entered. Fixed charges, slab effects, duties, fuel adjustments, meter charges, taxes, arrears or subsidies can change the final payable bill.