# Appliance Wattage Calculator

This appliance wattage calculator will assist you in **estimating the electricity consumption** in your house and how much you'll have to pay for it. Your (electricity consumption](calc:193) not only depends upon the number of appliances present in the house but also on their **wattage and the duration of time they operate**.

Appliance wattage in a household differs for different products, say a **geyser or water heater has a higher wattage value than a TV**. Even though a TV runs for longer, it might consume less electricity than a water heater due to its wattage.

This value is usually **stamped on the back or bottom of an appliance** and present in the product manuals. However, this remains an estimate of the maximum power a device would draw. The **actual wattage value depends on the condition and features** and the operating settings of an appliance. Read on to understand how to calculate appliance wattage for your house using our tool.

## How to calculate appliance wattage

Before we calculate the consumption of the household, let's take a look at a single device. For an appliance, say an internet or Wi-Fi router having a rated value of $W$ watts and runs for $h$ hours, the **consumption in kWh for the router** would be:

Using the above equation, and **considering different devices**, $P_1$ through $P_n$, the **total appliance wattage in household per day**, $P_h$ is:

where:

- $m_i$ – Quantity of $i^{th}$ appliance;
- $W_i$ – Wattage (in W) of $i^{th}$ appliance; and
- $h_i$ – Runtime or usage time (in hours) for $i^{th}$ appliance.

Once you know your electricity consumption per day, you can **multiply it by the unit cost** and the **number of days in a month**; you get the **monthly cost**.

### How to use the appliance wattage calculator

To use the calculator for appliance electricity cost:

**Add an appliance**from the list using the`add`

button.- Enter the
**power rating**for the added appliance. - Insert the
**quantity**of the said appliance. - Fill in the
**runtime per day**of the appliance. **Repeat**the steps from**1 to 4**for different appliances.- Enter the
**unit cost**(per kWh) for the electricity. - As you
**add more devices**and their details, the appliance wattage calculator will**update the cost and net consumption**.

💡 If you use the `advanced mode`

of the calculator, it will show you the daily power consumption of each appliance type, the total daily power consumption, and the daily cost.

## Example: Using the appliance wattage calculator for electricity consumption of appliances

Now that you know how to calculate the appliance wattage! Calculate the electricity consumption of appliances and cost for a house with `4`

ceiling fans and `5`

LED bulbs. The runtime for fans and bulbs are `8`

and `6`

hours, respectively. Take power rating for fans as `60 W`

and bulbs as `8 W`

.

To find the household appliance wattage:

**Add**`fan`

from the list using the`add`

button.- Enter the
**power rating**for the fan as`60 W`

. - Insert the
**quantity**of the fan as`4`

. - Fill in the fan's
**runtime per day**as`8`

hours. **Add**`LED bulb`

from the list using the`add`

button.- Enter the
**power rating**for the LED bulb as`8 W`

. - Insert the
**quantity**of the LED bulb as`5`

. - Fill in the
**runtime**of the LED bulb as`6`

hours. - Enter the
**unit cost**(per kWh) for the electricity as`0.12 $/kWh`

. - The electricity usage calculator will return:
- Monthly electricity consumption as
`64.8 kWh`

; and - Monthly cost as
`$7.78`

.

- Monthly electricity consumption as

## FAQ

### How do I estimate my monthly electricity consumption?

To estimate your monthly electricity consumption:

- Find the
**wattage rating**for all the devices you use. **Multiply**the**wattage ratings**with**usage hours**to get individual device consumptions.**Add**all the device consumptions.**Multiply**the**sum**with the**number of days**in a month to obtain the monthly electricity consumption.

### How do I calculate my monthly electricity bill?

To estimate your monthly electricity bill:

- Find the
**daily electricity consumption**by adding all the individual contributions. **Multiply**the**daily electricity consumption with the number of days in a month**.**Multiply**the**product**with the**unit electricity cost**.**Add**the**taxes**to the product to obtain your**monthly electricity bill**.

### How much energy does my water heater use?

The water heater would consume `~4 kWh`

per day. A water heater of average size has a **rated wattage value of about 4000 watts**. Considering a `4000 W`

heater that runs for about `1 hour`

a day, the energy consumed per day is:

`Energy = 4000 x 1 / 1000 = 4 kWh`

### How much energy does my ceiling fan use?

The fan would consume `~0.6 kWh`

per day. A ceiling fan has a **rated wattage value between 55 to 100 watts**. Considering a `75 W`

fan runs for about `8 hours`

per day, the energy consumed per day is:

`Energy = 75 x 8 / 1000 = 0.6 kWh`

.