Kilowatt-Hour Calculator
Energy Consumption & Cost Calculator
Calculate your energy usage and estimated costs with this interactive tool
Input Parameters
Calculation Results
Usage & Cost Projections
| Time Period | Energy Usage | Estimated Cost |
|---|
Commom Appliances Energy consumption
A kilowatt-hour (kWh) is a measure of electrical energy equivalent to a power consumption of 1,000 watts for 1 hour. Here’s how to calculate it:
kWh = (Wattage × Hours Used) ÷ 1000
LED TV (100W) used 5 hours/day:
(100W × 5h) ÷ 1000 = 0.5 kWh/day
Common KWh Usage Examples
- Air Conditioner (1500W): 12 kWh/day (8 hours)
- Electric Oven (2400W): 2.4 kWh/use (1 hour)
- Refrigerator (800W): 5.76 kWh/day (24 hours)
- LED Lights (10W each): 0.24 kWh/day (4 bulbs, 6 hours)
- Average Home: 900 kWh/month
- Small Apartment: 400 kWh/month
- Large House: 1500 kWh/month
- Home Office Setup: 100 kWh/month
Amount of energy used by common appliances
Below is a table that shows the estimated energy requirements of various appliances (these values can vary significantly depending on the appliance). It is important to note that the requirements listed on the packaging of an appliance generally reflect the maximum energy requirements of an appliance. Typical usage of the appliance likely results in far lower energy use than stated, so it cannot be calculated directly as power requirement × time.
| Common appliances | Estimated wattage (W) |
|---|---|
| Home appliances: | |
| Air Conditioner (HVAC) | 2500-10000 |
| Air conditioner (window unit) | 1500-5000 |
| Heater (home) | 5000-20000 |
| Heater (portable) | 750-2000 |
| Humidifier | 25-350 |
| Dehumidifier | 200-750 |
| Fan (ceiling, table) | 15-200 |
| Light bulb (LED) | 3-25 |
| Light bulb (incandescent) | 15-200 |
| Electric water heater | 3000-6600 |
| Kitchen appliances: | |
| Refrigerator | 500-1000 |
| Electric range/oven | 2000-5000 |
| Electric cooktop/stove | 750-5000 |
| Microwave oven | 750-1500 |
| Dishwasher | 1200-2000 |
| Coffee maker | 600-1200 |
| Toaster | 750-1500 |
| Electric kettle | 1000-2000 |
| Electric cooker | 160-1500 |
| Other appliances: | |
| Electric vehicle charger | 1,500-20,000 |
| Television | 25-500 |
| Washing machine | 400-1500 |
| Clothes dryer | 1800-5000 |
| Clothes iron | 750-2000 |
| Hair dryer | 750-2000 |
| Desktop computer | 100-250 |
| Laptop computer | 35-150 |
| Smart phone charger | 5-25 |
| Water pump/motor | 750-2000 |
