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There is no single reliable wattage for a Windows PC playing YouTube continuously. The amount depends on the PC, the playback workload and whether a monitor or other equipment stays on. For a useful estimate, measure the actual setup at the wall, convert its average watts to kilowatt-hours (kWh), then use the tariff that applies to your household.
Calculate the electricity use from your measured wattage
For a steady average draw, use this formula:
Monthly energy (kWh) = average watts × hours per day × days ÷ 1,000
For 24 hours a day over a 30-day month, that simplifies to average watts × 0.72. For example, a setup averaging 100 W would use 72 kWh in 30 days. That is an arithmetic example, not a claim that 100 W is typical for a Windows PC playing YouTube.
Use the measured draw of the equipment you intend to leave running—not the maximum wattage printed on the PC’s power supply. If your measurement includes a monitor, router or other equipment, its result includes those devices too; if it does not, add them only if you measure them separately.
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Measure the whole setup you plan to leave on
- Define the setup. Decide whether YouTube will play in a browser or app, whether playback continues overnight, what resolution you will use, and whether the display remains on. Include network equipment in the measurement only if you want its consumption counted.
- Use a plug-in electricity usage monitor. Connect the PC and any equipment you want included through the monitor, then run the intended playback setup for a representative period. Use its average wall draw in watts, rather than assuming a component or power-supply rating is the amount consumed continuously.
- Convert the average to kWh. Multiply average watts by the actual hours and days, then divide by 1,000. For a continuous 30-day month, multiply average watts by 0.72.
- Estimate the energy charge with your local tariff. Check your latest bill or your distribution utility’s current tariff schedule for your residential category. Multiply the calculated energy use by the applicable rate only if that rate is suitable for the energy being estimated.
The result represents the tested equipment, settings and measurement window. A short measurement may not capture changes in playback or idle behavior over a full month, and a meter cannot count equipment that is not connected through it.
Why one India-wide rupee estimate would mislead
Retail electricity tariffs in India are determined by the relevant Electricity Regulatory Commission, and the applicable bill calculation depends on the utility and consumer category. The Press Information Bureau, Government of India, stated in a 2026 release: “Electricity tariffs in India are determined by the Appropriate Electricity Regulatory Commissions under the Electricity Act, 2003.” A universal monthly rupee figure cannot be calculated reliably without the state, distribution utility, category, applicable slab and current tariff.
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Your total household bill may also include fixed charges, duties, subsidies or slab effects. As a result, multiplying the PC’s kWh by one simple per-unit figure may not match the change on the bill. A utility calculator is relevant only to its own service area and tariff basis; WBSEDCL’s Energy Cost Estimator, for example, says it uses the latest tariff order passed by WBERC.
Published PC figures are context, not a YouTube forecast
The OECD/International Energy Agency’s 2009 historical estimated desktop table lists a 65 W PC plus 32 W monitor (97 W combined) in “Idle” mode, and an 85 W PC plus 35 W monitor (120 W combined) in “Active” mode. These figures are old estimates, not current measurements, not specific to YouTube playback, and not a prediction for a particular modern PC. They can illustrate why it matters to include the display, but they should not replace measuring your own setup.
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No current primary controlled measurement for a representative Windows PC playing YouTube is established here. Treat any wattage you calculate from a published historical reference as context, not as the answer for your computer.
Windows settings: keep playback requirements in mind
Windows 11 provides power mode, energy saver and screen and sleep timeouts. A shorter screen timeout can turn off the screen after inactivity; a sleep timeout puts the device to sleep. If video must keep playing, the PC cannot sleep during that playback period. If you only need audio, letting the display turn off may reduce display use, but the saving depends on the equipment and should be measured rather than assumed.
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Microsoft also notes that some supported Windows apps can use lower video resolution to save network bandwidth. That guidance does not establish an electricity saving for YouTube playback on a Windows PC, so do not count on a particular power reduction from lowering resolution.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Playback on a PC is different from keeping a live channel online
This estimate is for a Windows PC playing YouTube locally. It is not a measurement of a PC encoding and sending a live stream, which is a different workload. If your actual goal is to keep uploaded videos streaming live on a YouTube channel, StreamNeo is a cloud service for that separate use case: it loops uploaded videos without requiring your home computer to remain on. It does not stream a camera feed.
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Or let it run in the cloud
- Upload a recording or build a playlist.
- Add your YouTube stream key once.
- Go live; StreamNeo loops the uploaded video from the cloud.
Nothing has to stay on at home; each slot streams your upload at its original quality up to 4K 60fps for one flat price, with automatic recovery if YouTube drops the stream. The first day is free with no card. Monthly pricing is $9.99 per month. This changes where a live stream runs; it does not establish a specific electricity saving for your PC or household. Learn about StreamNeo or start the free day.
Quick Recap
Which estimate method should you use?
| Method | Useful when | Limitation |
|---|---|---|
| Plug-in wall measurement | You want a setup-specific estimate based on your PC and the equipment you actually leave on. | It represents only the tested hardware, settings and measurement window; devices not plugged through the meter are excluded. |
| Published reference figure | You want a historical comparison point. | The cited IEA desktop estimates date to 2009 and are not YouTube-specific or representative of every current PC. |
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