# How many watts does a computer use?

A desktop computer uses between 60 and

**250 watts**, depending on whether it is idle. A laptop consumes 15 to 45 watts. A 22-inch LCD monitor uses an average of 25 watts, while an older 17-inch cathode ray monitor would use about**80 watts**.A.

### How many watts does a computer monitor draw?

A typical desktop computer uses about

**65**to**250 watts**. To find the figure for your particular computer you can contact the manufacturer (not me), or see my section on measuring electrical use. Add another**20-40 watts**for an LCD monitor, or about**80 watts**if you have an old-school 17" CRT.#### How many watts is a coffee maker?

When making coffee the coffee machine will use around**300**to**600 watts**for 2 cups of coffee and**1000**to**1500 watts**for 8-10 cups of coffee. We estimate that an average coffee maker will use**800 watts**to produce 4 cups of coffee in 10 minutes.#### How much power does a refrigerator use per day?

fridge uses 1400 kWh a year, while a modern energy-efficient model uses only 350 kWh — a whopping 75% reduction. At 15¢ kWh, trading in a pre-1986 fridge for a new efficient one would save about**$158**a year in electricity costs. And some older fridges are even worse than the average.#### How many watts is a hair dryer?

Most hair dryers will have a power rating label to indicate the maximum wattage, which typically ranges from 800 to**1800 watts**. The energy use of a typical hair dryer first depends which mode it is using. Unheated air can use as few as**70 watts**of power, but a hair dryer on high heat will use around**1500 watts**.

B.

### How many watts per hour does a computer use?

The power consumption of a computer varies depending on whether it is a desktop or a laptop: A desktop uses an average of 200 W/hour when it is being used (loudspeakers and printer included). A computer that is on for eight hours a day uses almost

**600 kWh**and emits 175 kg of CO_{2}per year.#### How much power is needed to power a light bulb?

An incandescent**light bulb**costs about 50 cents and lasts about 750 hours. If you were to leave a 100-watt**bulb**burning for 24 hours each day, 365 days per year, it would**use**876 kilowatt hours per year. (1000 watts equals one kilowatt – “kilo” means a thousand.) A kilowatt-hour of electricity costs about 15 cents.#### How many watts does a dishwasher use?

Modern dishwashers are energy efficient and do not use a lot of water. Dishwashers use between**1200**and**2400 watts**of power, with an average dishwasher using**1800 watts**. Click calculate to find the energy consumption of a dishwasher using**1800 Watts**for 1 hour a day @ $0.10 per kWh.#### What is the wattage of a printer?

An average ink-jet or laser printer which is designed for home use will typically use**30 to 50 watts**when it is printing, in standby mode most printers will draw around**3 to 5 watts**of power. Commercial printers which are used in an office will draw**30 to 50 watts**on standby and 300 to 500 watts when printing.

C.

### How many watts does a 19 inch TV use?

A 19" TV uses about

**80 watts**, way less than just about any modern TV. LCD (and LCD/LED). This is the same type of screen that goes in laptop computers and modern computer monitors. Much more efficient than CRT, they use about 125, 210, and**280 watts**for the 32", 42", and 52" sizes respectively.#### How many watts does a 42 inch LED TV use?

Within the ENERGY STAR rated LED options, power consumption varied by as much as**50-70 watts**depending on the TV size and manufacturer. After reviewing the energy consumption cost of a few models, I finally chose a 42-inch LED TV that uses**79 watts**.#### How many watts are in a flat screen TV?

The average "active mode" power use of LCD flat-screen TVs in the 35-inch to 54-inch category was about**250 watts**during the years 2005 to 2007, but is now closer to**100 watts**, according to the study.#### How many watts is a router?

This can only be calculated if you know what the wattage of your network router is. Yours could consume anything from 2 to**20 watts**, although the average is around 6. Taking a standard rate of 21.63 cents per kilowatt hour, you can therefore expect your Wi-Fi router to cost around $0.0311 per day to operate.

Updated: 26th October 2019