How to Calculate Electricity Usage Rates at Home per Day to Monthly

Calculating electricity costs at home is an important step to managing your finances and ensuring efficient electricity consumption. By knowing how to calculate electricity costs, you can manage your energy usage and minimize expenses.

This article will explain how to calculate electricity costs in a simple yet easy-to-understand way. Let's take a look!

Electricity Cost per kilowatt hour (kWh)

The first step in calculating electricity costs is to understand the current electricity tariff class. Electricity tariffs in Indonesia vary based on the customer class determined by PLN. Some common electricity tariff groups include:

1. R-1/TR (small household)

Tariffs for households with 1,300 VA and 2,200 VA.

2. R-2/TR (medium household)

Tariffs for households with power from 3,500 VA to 5,500 VA.

3. R-3/TR (large household)

Tariff for households with power of 6,600 VA and above.

The tariff per kWh varies depending on the tariff class and the latest information can be seen on the official PLN website or on your electricity bill.

Electrical Equipment Checking & Recording

It is important to check and record the use of electrical equipment at home to calculate electricity costs more accurately. You can follow some of the steps below.

1. Make a list of electrical appliances

The first step is to make a list of all the electrical appliances in your home. This step is important because each device contributes to the total monthly electricity consumption. Here are some examples of appliances that you need to note down.

Lights

Take note of the type and number of lights that you use in each room.

Fan

Take note of every fan used, whether standing, wall-mounted, or table fans.

Television

Don't forget to take note of each television unit including its size as the power required may vary.

Air conditioner (AC)

AC is one of the most energy-consuming appliances, so take note of the details.

Refrigerator

Refrigerators usually operate throughout the day, thus their power consumption is quite significant.

Washing machine

Record how many times the washing machine is used per week and how long each use takes.

Other kitchen appliances

You can check your microwave, electric oven, rice cooker, blender, and so on.

2. Electricity Power Check (Watt)

After listing all the electrical appliances, the next step is to check the electrical power of each appliance. This power is usually indicated on the device label or in the manual book. Electrical power is shown as watts (W). Here are some ways to check the power.

Equipment label

Many electrical appliances have a label that indicates their electrical power. This label is usually found on the back or bottom of the device.

Guidebook

Checking the manual book can explain the electrical power information if the label on the equipment is unclear or hard to find.

Online search

You can search for device specifications online by using the device make and model if you do not have access to labels or manuals.

For example, an LED lamp may have 10 watts of power, a fan may have 75 watts of power, a 32-inch LED television may have about 60 watts of power, and a 1 PK (Paard Kracht) air conditioner may have about 800 watts of power.

3. Record usage time

The final step is to record how long each appliance is used each day. This is important to calculate the total daily energy consumption of each device. Here is how you can do it.

Daily use

Determine and record how many hours per day each appliance is used. For example, how many hours the lights in the living room are on, how long the air conditioner is on, and how many hours the television is watched.

Average weekly usage

For appliances that are not used every day such as washing machine then do record the frequency of use in a week and calculate the daily average. For example, if the washing machine is used 3 times a week for 1 hour each time then the average use is about 0.43 hours per day.

Customize with activities

Pay attention to your daily activities that can affect your appliance usage. For example, during weekends you may use more electrical appliances than weekdays.

You can see an example of this when the living room lights are on for 5 hours every day. The fan is used for 8 hours a day. The television is on for 4 hours every day. The air conditioner is turned on for 6 hours a day at night and the refrigerator operates for 24 hours a day.

Estimated Electricity Usage per Day

by following these steps, you can calculate your electricity costs per day

1. Daily consumption calculation (Wh)

Use the following formula for each piece of equipment to calculate daily consumption:

Daily Consumption (Wh) = Electricity Power (Watt) x Length of Use (hours)

Example:

If you use a fan that has a power of 75 watts for 8 hours a day

Daily Consumption (Wh) = 75 Watt x 8 hours = 600 Wh

2. Total Daily Consumption (kWh)

Add up the daily consumption of all appliances and convert to kWh (1 kWh = 1,000 Wh).

How to Calculate Electricity Costs Per Day

After knowing the total daily consumption in kilowatt hour kWh, then calculate the electricity cost per day with the following formula.

Electricity Cost Per Day = Total Daily Consumption (kWh) x Electricity Tariff per kWh

Example:

If the total daily consumption is 10 kWh and the electricity tariff is IDR 1,467 per kWh (Tariff data per class is created)

Electricity Cost Per Day = 10 kWh x Rp1,467 = Rp 14,670

How to Calculate Electricity Costs Per Month

You can calculate the cost of electricity per month by multiplying the daily cost by the number of days in a month.

Electricity Cost Per Month = Electricity Cost Per Day x 30

Example:

If the electricity cost per day is IDR 14,670

Electricity Cost Per Month = IDR 14,670 x 30 = IDR 440,100

Why are SNI Standardized Cables important?

The safety of electrical installations is also very important in addition to the efficient use of electricity. By using SNI-standard cables such as NYM (type of cables) from Wilson Cables can ensure that the electrical installations in your home are safe and durable. NYM cables have double insulation that makes them safer and more resistant to high temperatures and humidity also reducing the risk of short circuits and fires.

Wilson Cables provides high-quality cables that fulfil the Indonesian National Standard (SNI), giving you extra confidence that your electrical installation meets strict safety standards. Thus, in addition to saving electricity costs, you also ensure the safety of your home.