Default 2BHK Indian Home
Electricity Bill & Home Load Calculator
Estimate smart meter units, appliance load, monthly bill, inverter backup and rooftop solar savings for your home.
Tariff
Electricity rate
Live meter
Current running load
Turn rooms or appliances ON/OFF and this meter updates instantly.
Ready to use
Your default room cards
Click a room card to edit its appliances. Use the room switch for quick ON/OFF.
Full custom builder
Build floors, rooms, and appliances
Click any room card to add appliances, update wattage, and tune usage in one focused panel.
House / floor layout
Backup power
Inverter load calculator
Select appliances below for backup. Results update from your current rooms and appliance details.
Rooftop solar
Solar savings calculator
Solar savings use your live monthly units, tariff, and solar inputs.
One tap modes
Scenarios and comparison
Choose a daily-use scenario to quickly change ON/OFF appliances and compare savings.
Smart savings
Suggestions for your home
These tips are generated from your appliance wattage, usage hours, and active load.
Download and share
Result report
Use these buttons to save an image, PDF, WhatsApp text, or printable summary.
Estimates are approximate. Actual electricity bill depends on appliance efficiency, tariff slab, voltage, usage pattern, power factor, and local electricity board charges.
How to calculate electricity bill?
The basic formula is: Units = Watts x Hours / 1000. For monthly cost, multiply monthly units by your electricity rate per unit. Example: a 1000W appliance used for 2 hours consumes 2 units. This electricity bill calculator India tool uses appliance watts, quantity, hours per day, days per month and tariff to estimate monthly bill amount.
Smart meter reading to electricity bill estimate
If you have a smart meter or digital electricity meter, note the current kWh reading and subtract the previous reading from your last bill. The difference is units consumed. Use that value with your electricity rate, or build your appliance list in this calculator to compare smart meter units with estimated room-wise usage.
How to calculate home load?
Connected load is the total rated wattage of all appliances in your home. Running load is the total wattage of appliances that are ON right now. For sanctioned load, a practical estimate is peak running load plus a safety margin. This is useful for 1BHK, 2BHK, 3BHK, independent floors, small shops and home office setups.
Appliance load calculator for rooms and floors
Add appliances room by room to find which space uses the most power. Fans, lights, refrigerator, AC, geyser, induction cooktop, water pump, iron and heater all affect the peak load differently. The live digital meter shows active watts, kW, monthly units, estimated bill and recommended sanctioned load.
Common appliance wattage in India
| Appliance | Typical wattage | Usage note |
|---|---|---|
| LED bulb | 9W to 20W | Low-cost lighting option |
| Ceiling fan | 50W to 80W | Runs for long hours in summer |
| Refrigerator | 120W to 250W | Usually active 20 to 24 hours |
| 1.5 ton AC | 1100W to 1800W | Depends heavily on rating and temperature |
| Geyser | 2000W to 3000W | High load for short duration |
| Induction cooktop | 1200W to 2000W | High kitchen load |
How much electricity does AC consume?
A 1 ton AC may consume about 0.8 to 1.2 units per hour. A 1.5 ton AC often consumes about 1.1 to 1.8 units per hour. Inverter ACs and 5-star models can reduce usage when the room reaches the set temperature.
Connected load, running load and sanctioned load
Connected load means installed appliance capacity. Running load means what is switched ON at a specific time. Sanctioned load is the approved load from your electricity board. A common planning method is to multiply peak running load by 1.25 so there is margin for startup current and future appliance additions.
How to choose inverter capacity?
Add the watts of appliances you need during power cuts. Divide that number by about 0.8 power factor to estimate inverter VA. Battery Ah depends on backup time, battery voltage, efficiency, and depth of discharge.
Solar savings estimate
Recommended solar size can be estimated from monthly units divided by sun hours per day and 30 days. Payback depends on installation cost, subsidy, electricity rate, roof space, net metering rules and how much daytime load you can use directly from rooftop solar.
Frequently Asked Questions
How do I calculate electricity bill from watts?
Multiply watts by hours used, divide by 1000, and multiply by your electricity rate. For monthly usage, multiply daily units by days used in the month.
What is 1 unit of electricity?
One unit is 1 kilowatt-hour or 1 kWh. A 1000W appliance running for one hour uses 1 unit.
How many units does 1.5 ton AC consume?
A 1.5 ton AC commonly uses about 1.1 to 1.8 units per hour. A 5-star inverter AC can be lower depending on temperature and room conditions.
What is connected load?
Connected load is the total wattage of installed appliances. Running load is the wattage of appliances currently switched on.
What inverter size do I need for home?
Select essential appliances for backup, add their watts, then divide by 0.8 power factor for approximate VA. Add margin for startup current and future needs.
Can inverter run AC?
Only a suitably sized inverter and battery bank can run AC. Most small home inverters are meant for fans, lights, WiFi, TV, and small appliances.
How many solar panels are needed for home?
First estimate the required solar kW from monthly units. Then divide by panel rating. For example, a 3 kW system may use around six 500W panels.
How accurate is this calculator?
It is an estimate. Actual bills depend on tariff slabs, fixed charges, taxes, voltage, appliance efficiency, usage pattern, and power factor.
How do I calculate electricity bill from smart meter reading?
Subtract the previous kWh reading from the current smart meter reading to get units consumed. Then multiply units by your rate and add any fixed charges, taxes, duty or slab charges shown by your electricity board.
How do I calculate appliance load in watts and kW?
Multiply each appliance watt rating by quantity. Divide the total watts by 1000 to convert it into kW. Add only switched ON appliances for running load and all installed appliances for connected load.
What sanctioned load is needed for a 2BHK or 3BHK home?
It depends on ACs, geysers, induction, pump, heater and other heavy appliances. A practical estimate is peak running load multiplied by 1.25 safety margin.
How can appliance load details reduce electricity bill?
Room-wise load helps you find high-cost appliances, reduce usage hours, replace inefficient lights or ACs, avoid heavy loads together, and compare current setup with optimized usage.