How Much Electricity Does a Low Wattage TV Use?

TVs used to be chunky power munchers. Now many are slim, bright, and much kinder to your electric bill. A low wattage TV can sip electricity instead of gulping it. That is good news for movie nights, gaming, cooking shows, and lazy Sunday cartoons.

TLDR: A low wattage TV usually uses about 20 to 60 watts while it is on. If you watch it for 4 hours a day, it may use about 2.4 to 7.2 kWh per month. At an electricity price of 15 cents per kWh, that costs about 36 cents to $1.08 per month. Bigger screens, brighter settings, and long watch times use more power.

So, how much electricity does a low wattage TV use?

A low wattage TV often uses between 20 watts and 60 watts when it is running. Some tiny TVs use even less. Some larger efficient TVs use a bit more.

Think of watts like the speed of electricity use. A 30 watt TV uses electricity slowly. A 300 watt heater uses it fast. Your TV is usually not the villain in your power bill story. It is more like a polite guest eating one cookie.

Here is a simple idea:

• Small LED TV: about 20 to 35 watts
• Medium LED TV: about 35 to 60 watts
• Large efficient TV: about 60 to 100 watts
• Old plasma TV: sometimes 150 to 400 watts

That is a big difference. A modern low wattage TV can use far less power than older models. If your TV is thin, LED, and energy rated, it is probably pretty efficient.

The magic formula

Do not worry. This math is friendly. It will not bite.

To find electricity use, use this formula:

Watts × Hours used ÷ 1,000 = Kilowatt hours

Kilowatt hours are shown as kWh. This is what your power company uses on your bill.

Let us try an example.

You have a 40 watt TV. You watch it for 4 hours a day.

• 40 watts × 4 hours = 160 watt hours per day
• 160 ÷ 1,000 = 0.16 kWh per day
• 0.16 × 30 days = 4.8 kWh per month

So your TV uses about 4.8 kWh per month.

If electricity costs 15 cents per kWh, the monthly cost is:

4.8 × $0.15 = $0.72

That is only 72 cents a month. Your TV may cost less to run than one fancy coffee topping.

Common low wattage TV examples

Every TV is different. Yet these examples will help you picture it.

TV Wattage Use Per Day Monthly kWh Monthly Cost at $0.15/kWh

20 watts 4 hours 2.4 kWh $0.36

30 watts 4 hours 3.6 kWh $0.54

40 watts 4 hours 4.8 kWh $0.72

60 watts 4 hours 7.2 kWh $1.08

These numbers are estimates. Your actual cost depends on your electricity rate. It also depends on your TV settings. A super bright screen uses more power. A dimmer screen uses less.

What makes a TV “low wattage”?

A low wattage TV uses less electricity than an average TV of similar size. It is usually a modern LED or LCD model. It may also have an energy saving mode.

Several things affect TV wattage:

• Screen size: Bigger screens use more power.
• Screen brightness: Brighter screens use more energy.
• TV type: LED TVs are usually efficient.
• Picture mode: Vivid mode often uses more power.
• Volume: Loud built in speakers can use a little more.
• Smart features: Apps and WiFi use small amounts of power.

Size matters a lot. A 24 inch TV may use about 20 watts. A 55 inch TV may use 60 to 100 watts. A 75 inch TV may use more. That does not mean big TVs are bad. It just means they have more screen to light up.

Standby power: the tiny vampire

When your TV is “off,” it may not be fully off. It may be waiting for the remote. It may be checking for updates. It may be keeping WiFi ready. This is called standby power.

Standby power is usually low. Many modern TVs use less than 0.5 to 2 watts in standby mode. That is tiny. But tiny things add up when they run all day.

Example time.

A TV uses 1 watt in standby. It stays in standby for 20 hours a day.

• 1 watt × 20 hours = 20 watt hours per day
• 20 ÷ 1,000 = 0.02 kWh per day
• 0.02 × 30 = 0.6 kWh per month

At 15 cents per kWh, that is about 9 cents per month.

That is not scary. It is more like a vampire hamster. Still, if you have many devices, standby power can become noticeable.

How to find your TV’s wattage

You do not need to guess. You can find the wattage in a few places.

1. Look at the label on the back of the TV. It may show watts or amps.
2. Check the user manual. Search for “power consumption.”
3. Look up the model online. Type the model number and “watts.”
4. Use a plug in power meter. This gives the best real world answer.

A plug in power meter is a small gadget. You plug it into the wall. Then you plug the TV into the meter. It tells you how many watts the TV is using. It is like a speedometer for electricity.

If your TV label says amps instead of watts, you can estimate watts like this:

Volts × Amps = Watts

In many homes in the United States, voltage is about 120 volts. So if a TV uses 0.5 amps:

120 × 0.5 = 60 watts

This is only an estimate. TVs do not always use the maximum listed amount. The label may show the highest possible power draw.

Does watching more TV cost a lot?

It depends on the TV and the hours. But with a low wattage TV, the cost is often small.

Let us compare two homes.

Home A: Casual watcher

• TV wattage: 30 watts
• Use: 2 hours per day
• Monthly use: 1.8 kWh
• Monthly cost at 15 cents: 27 cents

Home B: Binge watcher

• TV wattage: 50 watts
• Use: 8 hours per day
• Monthly use: 12 kWh
• Monthly cost at 15 cents: $1.80

Even the binge watcher is not breaking the bank. Of course, if your electricity rate is higher, your cost rises. If your TV is huge or old, the cost rises too.

Low wattage TV versus other household items

A low wattage TV is modest. Many household devices use more power.

• Low wattage TV: 20 to 60 watts
• Laptop: 30 to 90 watts
• Game console: 50 to 200 watts
• Microwave: 700 to 1,500 watts
• Space heater: 1,500 watts
• Hair dryer: 1,200 to 1,800 watts

So your TV is not usually the big energy monster. Heating, cooling, cooking, and drying clothes often use much more electricity.

But here is the twist. TVs often run for many hours. A small wattage can still matter over time. That is why efficient settings are helpful.

Easy ways to use less electricity

You do not have to watch TV in a cave. You can save power and still enjoy the show.

• Turn on energy saving mode. This lowers power use.
• Dim the brightness. Your eyes may thank you too.
• Turn off vivid mode. It looks punchy, but it can use more power.
• Use a sleep timer. Great if you doze off during documentaries.
• Turn off the TV when nobody is watching. Pets do not need 4K news.
• Unplug during long trips. This stops standby power.
• Choose the right screen size. Bigger is fun, but not always needed.

One small change can help. Turning down brightness is often the easiest win. Many TVs are set very bright in stores. Your living room is not a showroom. Unless it is. In that case, nice showroom.

Does 4K use more electricity?

A 4K TV can use more power than a lower resolution TV. But resolution is not the only factor. Screen size and brightness matter more.

A small 4K TV may use less power than a large older HD TV. A modern 4K LED TV can still be efficient. An OLED TV can also be efficient, depending on what is shown on screen. Dark scenes usually use less power on OLED. Bright white scenes use more.

So do not panic about 4K. Just check the wattage. Also check the energy rating if one is available.

What about gaming?

Gaming changes the picture. The TV may still use the same kind of power. But the game console or gaming PC can use a lot more.

For example, your low wattage TV may use 40 watts. Your console may use 100 to 200 watts. Together, that is more like 140 to 240 watts.

That is still not wild compared with a heater. But it is much more than the TV alone. If you are trying to estimate gaming cost, include the console too.

Yearly cost of a low wattage TV

Let us use a friendly example.

You have a 45 watt TV. You watch it for 5 hours per day.

• 45 × 5 = 225 watt hours per day
• 225 ÷ 1,000 = 0.225 kWh per day
• 0.225 × 365 = 82.125 kWh per year
• 82.125 × $0.15 = $12.32 per year

So that TV costs about $12 per year to run. That is very reasonable. It is less than many streaming subscriptions for one month.

Final answer

A low wattage TV usually uses about 20 to 60 watts while it is on. If you watch it for a few hours each day, it may cost only a few cents per day. In many homes, the monthly cost is under one or two dollars.

The exact number depends on the TV size, brightness, settings, and watch time. To know for sure, check the label or use a plug in power meter. Then use the simple formula: watts × hours ÷ 1,000.

So go ahead. Enjoy the show. Your low wattage TV is probably sipping power like a tiny electric hummingbird.