Kilowatt-Hour Calculator
1. Watt-hours from Time
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 |
|---|
Common Appliance Examples
Energy consumption By Commom Appliances
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 |
💡Energy Saving Tips
- ✓ Switch to LED bulbs
- ✓ Use natural light when possible
- ✓ Install motion sensors
- ✓ Use energy-efficient models
- ✓ Run full loads only
- ✓ Maintain regularly
- ✓ Use programmable thermostats
- ✓ Seal air leaks
- ✓ Regular HVAC maintenance
Kilowatt-hour (KWh) Calculator
👋 Welcome to the Kilowatt-hour (KWh) Calculator! This tool helps you calculate kilowatt-hours based on watt-hours or ampere-hours. 🚀
Calculate Kilowatt-hours from Watt-hours
To calculate kilowatt-hours from watt-hours, you can use the following formula:
KWh = Wh ÷ 1,000Where:
- KWh = Kilowatt-hours
- Wh = Watt-hours
For example, if you have 2,500 Wh, the calculation would be:
KWh = 2,500 Wh ÷ 1,000 = 2.5 KWhCalculate Kilowatt-hours from Ampere-hours
To calculate kilowatt-hours from ampere-hours, you can use the following formula:
KWh = (Ah × V) ÷ 1,000Where:
- KWh = Kilowatt-hours
- Ah = Ampere-hours
- V = Voltage (in volts)
For example, if you have a battery rated at 100 Ah and operates at 12V, the calculation would be:
KWh = (100 Ah × 12 V) ÷ 1,000 = 1.2 KWhUnderstanding Kilowatt-hours (KWh)
What is a Kilowatt-hour (KWh)?
A kilowatt-hour (KWh) is a unit of energy that measures the amount of work done or energy consumed over time. It represents the energy used when one kilowatt of power is consumed for one hour. For example, a 1,000-watt appliance running for one hour uses 1 KWh of energy.
Why Calculate Kilowatt-hours?
Calculating kilowatt-hours is essential for understanding energy consumption and efficiency. It helps you determine how much energy your devices use, allowing for better energy management and cost savings.
Practical Applications
Knowing how to calculate kilowatt-hours can help you in various scenarios, such as sizing batteries for solar systems, estimating energy costs, and optimizing the use of electrical appliances.
Kilowatt-Hour (KWh) Calculator FAQs
A Kilowatt-hour (KWh) is a unit of energy equivalent to one kilowatt (1 kW) of power used for one hour. It is commonly used to measure electricity consumption in homes and businesses.
You can calculate KWh from time using the following formula:
Where:
- KWh = Kilowatt-hours
- Power (W) = Power consumption in Watts
- Time (h) = Time in hours
For example, if a device uses 1,500 Watts for 2 hours:
You can calculate KWh from Ampere-hours using the following formula:
Where:
- KWh = Kilowatt-hours
- Ah = Ampere-hours
- V = Voltage in volts
For example, if you have 100 Ah at 12 volts:
Calculating KWh is essential for:
- Understanding energy consumption and costs on your electricity bill.
- Making informed decisions about energy efficiency and usage.
- Planning for energy needs in residential and commercial settings.
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