Multi-Appliance Electricity Usage Calculator
Add your appliances below to calculate total energy consumption.
| Appliance Name | Power (W) | Usage (hrs/day) | Remove |
|---|---|---|---|
Results
Power Consumption Calculator – Estimate Energy Use & Electricity Bills
To calculate power consumption, use the formula:
Power (W) × Hours Used ÷ 1000 = Energy in kWh
👉 Example: A 1500W heater running for 4 hours = 1500 × 4 ÷ 1000 = 6 kWh.
If electricity costs $0.15/kWh, the bill will be 6 × 0.15 = $0.90.
This calculator helps you instantly estimate appliance energy use, daily load, and electricity costs for homes, offices, or industries.
What is a Power Consumption Calculator?
A power consumption calculator is an online tool that estimates how much electricity your appliances use. By entering the wattage (W), voltage (V), current (A), and usage time (hours), it calculates:
kWh (kilowatt-hours) consumed
Cost per day, month, or year based on local tariff rates
Appliance comparisons to spot high-energy devices
This tool works for homes, offices, and industrial setups.
How to Calculate Power Consumption (Formula)
The standard formula:
Example: A 1500W heater running for 2 hours consumes:
1500×2÷1000=3 kWh
At $0.20/kWh, that’s $0.60 per use.
Power Consumption Calculator for Home Appliances
Different appliances use electricity differently. Here’s an overview:
| Appliance | Average Wattage | Daily Use | Daily Consumption (kWh) | |
|---|---|---|---|---|
| Ceiling Fan | 75W | 12 hrs | 0.9 kWh | |
| 1.5 Ton AC | 1500W | 8 hrs | 12 kWh | |
| Refrigerator (300L) | 180W | 24 hrs | 4.3 kWh | |
| LED TV (42”) | 120W | 5 hrs | 0.6 kWh | |
| Washing Machine | 500W | 1 hr | 0.5 kWh | |
| Electric Heater | 2000W | 3 hrs | 6 kWh |
👉 Use our calculator to enter exact hours of use and local electricity rate for accurate results.
Regional Usage Examples
Pakistan: 1 unit = 1 kWh. Current tariff (approx ₨65/unit) → 500 units = ₨32,500 bill.
UK: Average electricity rate = £0.30/kWh. Running a 2000W heater for 24h costs ~£14.40/day.
India: ₹8/kWh. A 100W fan running 24h = ₹19.20/day.
Power Consumption for Different Use Cases
Air Conditioners (AC):
A 1.5 ton AC consumes ~1.5–2 kWh per hour. That’s 36–48 kWh per day if run 24 hours.Refrigerators:
A 300L fridge typically consumes 100–180 kWh/month.Computers & PCs:
Office PC: 200W → ~50 kWh/month
Gaming PC: 500–800W → 120–200 kWh/month
3-Phase Motors / Industrial Loads:
For factories, motors are calculated with volts × amps × √3 ÷ 1000 to get kW.
Quick Conversion Reference
Watts → kWh:
1000W for 1h = 1 kWh
500W for 2h = 1 kWh
Units (kWh):
1 Unit = 1 kWh
600 kWh = 600 Units
Costing:
Cost = kWh × Local Tariff
FAQs on Power Consumption Calculator
Q1: How do you calculate power consumption at home?
By multiplying appliance wattage × usage hours ÷ 1000.
Q2: What is the electricity bill for 500 units in Pakistan?
At ₨65 per unit → ~₨32,500.
Q3: Is 50 kWh a day a lot?
Yes. For a typical home, 50 kWh/day = ~1500 kWh/month, which is high.
Q4: What is the power consumption of a 1.5 ton AC?
~1.5–2 kWh per hour.
Q5: Which appliances consume the most electricity?
Air conditioners, heaters, refrigerators, and ovens.
Q6: How to reduce electricity bills?
Use energy-efficient appliances, LED lighting, and solar systems.