# Laptop Power Consumption, Calculation, 6 Power Saving Tips

### Laptop or Notebook PC Power consumption Calculator:

Enter the battery wattage, the charge holding time, and the per-unit rate then press the calculate button to get the laptop power consumption along with the electricity bill per hour, per day, per month, and per year.

By default, we have entered ASUS TUF Gaming FX505DT 15.6″ FHD 120Hz Laptop GTX 1650 4GB Graphics (Ryzen 5-3550H/8GB RAM/512GB PCIe SSD/Windows 10/Stealth Black/2.20 Kg), FX505DT-AL106T electrical data.

 Enter Hours Used Per Day: Hrs Enter Battery Wattage: W Enter Charge Holding Time: Hrs Per Unit rate: Energy Per hour: Wh Energy Per Day: kWh Energy Per Month: kWh Energy Per Year: kWh Cost Per Hour: Cost Per Day: Cost Per Month: Cost Per Year:

### Laptop Power Consumption:

Hey, do you have a laptop? Do you know the electricity consumption of your laptop? The laptop contributes almost 2 to 5 % of your electricity bill.

A laptop is a device that is used to store and process the data both online and offline. The electricity consumption of the laptop is purely depending on the quality of the battery, screen size, RAM, Central processing unit, Graphics card, etc.

A typical laptop consumes 15 watts to 120 watts.

Laptop power consumption E (kWh-Laptop) is equal to the input current in amps times of the input voltage in volts divided by 1000.  The laptop power consumption formula can be written as,

E (kWh-Laptop) = I (A) x V (V) / 1000

Note that, we have not considered battery storage; we have just calculated the input current and input voltage when the battery is not connected to the laptop (I mean the laptop is connected in series with the charger). Here charger output current and the output voltage will be the laptop input current and voltage.

But in some cases, you may not able to calculate the input current and input voltage. During that time, you can calculate the laptop power consumption from the battery nameplate details.

Hence, the laptop power consumption E (kWh-Laptop) per hour in kWh is equal to the battery capacity P (Wh) in Watt-hour divided by 1000 times of the charge withstand time T(hr) in an hour. Hence the formula can be written as,

E (kWh-Laptop = P (Wh) / (1000 x T (hr))

For per day,

E (kWh-Laptop = P (Wh) * laptop working hours / (1000 x T (hr))

Per month,

E (kWh-Laptop = 30 x P (Wh) * laptop working hours / (1000 x T (hr))

Per year,

E (kWh-Laptop = 365 x P (Wh) * laptop working hours / (1000 x T (hr))

Note that, here we have considered the laptop work under the battery.

Example:

Let us take ASUS (8GB RAM, 8GB Graphic card, 19-inch screen) Laptop.

First, find the battery storing capacity, look at the image, the battery can provide 180 Watts per hour and the battery stands 4hours without connecting charger.

 Laptop Power Consumption – 12 Hours Battery Wattage 180 Charging Hold time 4 Consumption Total (Wh) kWh Hourly 45 0.045 Day 540 0.54 Month 16200 16.2 Yearly 194400 194.4
Learn More:   kW to Cable Size Chart & Electrical Cable Size Chart Amps

Hence, the laptop consumes 194.4 units per year