The Tool Desk
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There is no single reliable wattage for “a PC streaming YouTube”: actual draw depends on the computer and the rest of the setup. Measure your own equipment or use a clearly labeled estimate.
Calculate 24/7 electricity use and cost
The basic calculation is watts multiplied by hours, divided by 1,000:
kWh = watts × hours ÷ 1,000
For continuous operation over 365 days, use 8,760 hours. Multiply the resulting kWh by the applicable price per kWh on your electricity bill to estimate the energy charge.
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#1 Best Overall
- Various Monitoring Parameters: The power meter plug can monitor the power (W), energy (kWh), volts, amps, hertz, power factor, cost, minimum and maximum power (W), cumulative days and time of your appliances. By switching 7 display modes, you can easily know the various parameters while the appliance is working. The home energy monitor can also calculate and display how much power your appliance uses and how much electricity bill it cost in cumulative time
- Upgraded LCD Display: With large screen size 2.36 inch x 1.85 inch, clearer monitor backlit, our electrical usage monitor can display the data clearer and more visible no matter day or night. 180°full wide viewing angles is great for reading and recording the data in any angles. No need to stand on the front of the display and bend over to read the numbers
- Adjustable Backlight Time: Our upgraded watt meter has 5 options of backlight time. The default backlight time duration is 10 minutes(bL-0). If you want to change the backlight time, you can press and hold "UP" and "DOWN" button at the same time to enter backlight time setting, then press "UP" and "DOWN" to select the backlight time (bL-0 =10 minutes, bL-1=1 hour, bL-2=4 hours, bL-3=8 hours, bL-4=always on), finally press the "COST" to save the backlight time settings
- Overload protection: When the power of the appliance exceeds the overload power, the LCD will display “OVERLOAD” to warn the user. All the buttons will quit working and can only be workable when you lower or remove the load power. The default overload power is 3680W and is adjustable from 0 to 3680W. In general, you need to set the overload power to 1800W before using. Just press the "function" button for more than 3 seconds to enter the setting
- Data Memory Function: The wattage meter will record your power consumption data when you remove it from socket, or remove appliances from the electricity monitor. You can directly see the last data when you use it next time. This function can also automatically save the data when there is a sudden power failure
- Find the average wattage of the complete setup you want to include.
- Multiply that wattage by the number of operating hours.
- Divide by 1,000 to convert watt-hours to kWh.
- Multiply the kWh by your electricity rate per kWh.
For example, a constant 100 W draw over a 730-hour month uses 73 kWh. At an assumed $0.15/kWh, that is $10.95 in energy charges. A 730-hour month is an approximation; use your actual billing-period hours for a closer estimate.
Annual examples by average PC wattage
The following are arithmetic scenarios for a constant load over a 365-day year, priced at an assumed $0.15/kWh. This is not a national average or a live electricity tariff, and the wattages are not measurements of particular computers.
Rank #2
- Multi-function power monitor: Our electric usage monitor can monitor the power (W), electricity(kWh), voltage(V), frequency(Hz), current(A), power factor(PF), unit price($/kWh), total cost($) of your appliances. By switching 8 display modes, you can easily know the various parameters while the appliance is working. The “electricity” mode can calculate and display how much power your appliance uses. And the “total cost” mode will show how much electricity bill it cost in cumulative time
- Overload protection: When the loading power of the appliance is over the default overload threshold 1800W, the whole display with backlight and the word “OVERLOAD” will keep flashing to warn the users. Please turn off the appliance for safety concern
- Premium Material: The whole body of our energy meter is made of high-quality ABS material. It makes our home electricity usage monitor more long lasting, fireproof and anti-drop. The standard US socket and plug is suitable for all US standard appliances
- Backlight Display: With white backlight and black words, the LCD display of our home power monitor can display the data clearer and help you to read the data easier no matter day or night. The backlight will only lights up when the device is connected to AC power. If no button is pressed, the backlight turns off automatically after 10 minutes. You can also press the "UP" button to turn off the backlight manually, and press any button to turn on backlight again
- Easy to reset: No reset tool needed, our appliance power usage meter is easy to reset. You can press the “M” button for 5 seconds directly to reset the device. After reset, all cumulative data (electricity quantity, cost) will be cleared, and all settings will be restored to factory settings
| Average draw | Energy per year | Example energy cost per year |
|---|---|---|
| 30 W | 262.8 kWh | $39.42 |
| 50 W | 438 kWh | $65.70 |
| 100 W | 876 kWh | $131.40 |
| 200 W | 1,752 kWh | $262.80 |
| 500 W | 4,380 kWh | $657.00 |
At a 100 W average draw, every $0.01/kWh change in the rate changes the 365-day energy estimate by $8.76. Substitute the rate from your own bill rather than treating the example rate as universal.
Use the PC’s actual average draw, not its power-supply rating
A computer’s power supply rating describes its capacity, not the amount the PC continuously consumes. The U.S. Department of Energy notes that nameplate ratings are generally maximum design limits and may be two to four times actual consumption; when possible, measure the device’s consumption instead (DOE guidance).
Rank #3
- ✓ Backlit LCD Display: The watt meter features an upgraded backlit LCD display with a 160° wide viewing angle, providing clear and distinct data readings from any angle, day or night. (Note: To conserve energy, the backlight will automatically turn off after 15 seconds of continuous use.)
- ✓ 9 Types of Data Display: This energy meter plug accurately monitors a wide range of electrical parameters, including power (W), apparent power (VA), energy consumption (kWh), usage time (hours), power frequency (Hz), power factor (PF), voltage (V), current (A), and electricity cost. The user-friendly interface allows you to easily read and navigate through 9 types of data with a single button.
- ✓ Save Money and Energy: By toggling through the 9 display modes, you can gain insights into various operational parameters of your devices. The home energy monitor also calculates and displays the electricity consumption and cost over time, helping you save on your electricity bills by monitoring and managing energy usage.
- ✓ Data Storage: The plug-in electricity meter stores all non-real-time data, ensuring no information is lost in the event of a sudden power outage. If data exceeds the screen’s maximum display range, the screen will flash as a reminder. Pressing and holding the reset button for 3 seconds will reset the cumulative data to zero.
- ✓ Safe to Use: Rated voltage 125VAC, 60Hz, 15A maximum 1875W resistor and tungsten wire, 1/2HP. Clean and tidy interface, very simple to use.
A gaming PC at idle, a small office PC playing a video, and a laptop can have very different average draws. YouTube resolution, hardware video decoding, browser choice, display brightness, and background tasks can also affect the result. No universal wattage for a PC streaming YouTube 24/7 is established here.
Measure the whole setup
- Plug a compatible electricity-usage monitor into the wall, then connect the equipment you want to measure through it.
- Include the monitor, speakers, or other devices only if you want their consumption included in the estimate.
- Run the computer in the same conditions as the planned stream, including the same playback resolution and connected equipment.
- Use an energy reading averaged over several hours or days rather than a momentary watt reading. If consumption fluctuates, measuring over time and dividing by the measurement period gives a more useful average; see DOE’s measurement guidance.
A plug-in meter helps replace a guessed wattage with a reading from your own setup. Check that it is compatible with the equipment and load you intend to measure.
Rank #4
- Various Monitoring Parameters: The power meter plug can monitor the power (W), energy (kWh), volts, amps, hertz, power factor, cost, minimum and maximum power (W), cumulative days and time of your appliances. By switching 7 display modes, you can easily know the various parameters while the appliance is working. The home energy monitor can also calculate and display how much power your appliance uses and how much electricity bill it cost in cumulative time
- Upgraded LCD display: With large screen size 2.36 inch x 1.85 inch, clearer monitor backlit, our electrical usage monitor can display the data clearer and more visible no matter day or night. 180°full wide viewing angles is great for reading and recording the data in any angles. No need to stand on the front of the display and bend over to read the numbers
- Adjustable Backlight Time: Our upgraded watt meter has 5 options of backlight time. The default backlight time duration is 10 minutes(bL-0). If you want to change the backlight time, you can press and hold "UP" and "DOWN" button at the same time to enter backlight time setting, then press "UP" and "DOWN" to select the backlight time (bL-0 =10 minutes, bL-1=1 hour, bL-2=4 hours, bL-3=8 hours, bL-4=always on), finally press the "COST" to save the backlight time settings
- Overload protection: When the power of the appliance exceeds the overload power, the LCD will display “OVERLOAD” to warn the user. All the buttons will quit working and can only be workable when you lower or remove the load power. The default overload power is 3680W and is adjustable from 0 to 3680W. In general, you need to set the overload power to 1800W before using. Just press the "function" button for more than 3 seconds to enter the setting
- Data Memory Function: The wattage meter will record your power consumption data when you remove it from socket, or remove appliances from the electricity monitor. You can directly see the last data when you use it next time. This function can also automatically save the data when there is a sudden power failure
Apply your electricity rate carefully
Use the energy rate that applies to your account and billing period. Electricity prices can vary by season or time of use, and the bill may include fixed fees or demand charges. The simple calculation estimates the added energy charge; it does not allocate fixed fees or fully model tariffs with demand charges. The DOE discusses these differences in its guidance on evaluating utility rate options.
For context, the DOE Federal Energy Management Program used 11¢/kWh for examples in its computer-cost guidance in July 2024. That rate was for federal-facility examples, not a universal household price (DOE computer guidance).
Best Value
- 【Insightful Energy Tracking】Track your plug's energy use with clear and easy-to-understand statistics and intuitive charts, helping you optimize power usage.
- 【Estimate Your Energy Bill】 Enhance energy management by integrating with billing systems for clear cost visualization (both single and periodic readings). Additionally, programmable scheduling allows automatic operation of high-consumption devices during off-peak hours with lower electricity rates, resulting in cost savings.
- 【Smart Charging for Devices】Automatically cuts power once your device reaches the low-battery limit you set, preventing overcharging.
- 【Auto-Shutoff】Prevents electrical overload by automatically shutting off devices that use too much power.
- 【Voice & Remote Control】 With built-in support for both Alexa and Google Assistant, issue simple voice commands to adjust settings, turn devices on or off, or even access specific functions without lifting a finger. Manage Tapo P115 and its connected devices from anywhere with the user-friendly Tapo app.
Compare the PC with other playback devices
If the goal is simply to play a video, compare the complete PC setup with the device that could do the same job. ENERGY STAR recommends a tablet for small-screen streaming and identifies a smart TV as an efficient option for a larger screen. It also reports that a computer uses 11 times the energy of a digital media player in its comparison; this is ENERGY STAR’s comparative figure, not a guarantee for every model or a direct test of every PC-and-monitor combination (ENERGY STAR digital media player information).
Power management and a stream that must stay live
ENERGY STAR computer criteria cover Off, Sleep, and Idle modes and include power-management requirements; its computer page lists the specification effective date as October 2025 (ENERGY STAR computer criteria). But an active stream may prevent the computer from sleeping. Do not count sleep-mode savings while the PC is actively streaming; power-management settings are a separate consideration for periods when the computer is not doing that work.
Or let it run in the cloud
If your goal is a continuously live YouTube channel rather than keeping a local PC on, StreamNeo runs uploaded videos from the cloud. You upload a recording or create a playlist, add your YouTube stream key once, and go live; your home computer and connection do not have to stay on.
- One flat price per slot for any uploaded quality up to 4K 60fps, with no re-encoding or quality tiers.
- Automatic recovery if YouTube drops the stream.
- The first day is free with no card required, once per account.
Monthly pricing is $9.99 per month. See StreamNeo for details, or start your free first day.
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