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Kill A Watt Meters

10 Best Kill A Watt Meters 2026 in the United States

#1

Winner

10.0 score

Kill A Watt Connect P4498 Electricity Usage Monitor Power Consumption Meter with Two Piece Housing and 35 Inch Cord for Easy Use

Kill A Watt Connect P4498 Electricity Usage Monitor Power Consumption Meter with Two Piece Housing and 35 Inch Cord for Easy Use

KILL A WATT

10.0 score

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The Kill A Watt Connect P4498 is a practical electricity usage monitor designed to help users understand their power consumption. Its most notable feature is the 35-inch cord, which allows for flexible placement of the plug while keeping the display easily accessible. This can be particularly useful in hard-to-reach areas, ensuring you can always view your power usage data without hassle. The meter shows a variety of measurements including volts, current, watts, frequency, power factor, and VA, making it comprehensive for detailed energy tracking.

Rating
10.0
Chosen by1,266
Accuracy
Measurement Range
Display

Most important from
113 reviews

Accuracy
Programming the device with local utility costs for accurate cost estimates is straightforward.
Measurement Range
Perfect for monitoring power consumption of devices like portable ACs and computers.
Display
Magnets on the display unit allow it to stick nicely to metal surfaces, enhancing usability.
Data Logging
The device works perfectly for continuous monitoring of power consumption over extended periods.
Ease of Use
The split monitor/receptacle design is incredibly convenient for easy viewing and operation.
#2
9.7 score

Upgraded Watt Meter Power Meter Plug Home Electricity Usage Monitor, Electrical Usage Monitor Consumption, Energy Voltage Amps Kill Meter with Backlight, Overload Protection, 7 Modes Display-With Cord

20%OFF

Upgraded Watt Meter Power Meter Plug Home Electricity Usage Monitor, Electrical Usage Monitor Consumption, Energy Voltage Amps Kill Meter with Backlight, Overload Protection, 7 Modes Display-With Cord

MECHEER

9.7 score

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The MEACHEER Upgraded Watt Meter is a solid choice for anyone wanting to track their home appliance energy use easily. It covers many measuring points like watts, volts, amps, frequency, power factor, and even estimates electricity costs, which helps you understand your power consumption in detail. The large backlit LCD screen is clear and easy to read from different angles, and you can adjust how long the backlight stays on, which is handy in various lighting conditions.

Rating
9.7
Accuracy
Measurement Range
Display

Most important from
7753 reviews

Accuracy
This watt meter provides clear and consistent readings for power consumption, voltage, current, and power factor, making it ideal for anyone wanting to analyze electrical load accurately.
Measurement Range
The device is a solid choice for home use and basic lab experiments, especially for sizing battery backups or solar generators by understanding real power demands.
Display
The large, bright display remains easy to read even from an angle and in bright, indirect sunlight, enhancing usability in various lighting conditions.
Data Logging
The data retention feature ensures your measurements are saved even during power outages or when unplugged, so you never lose your tracked information.
Connectivity
Plugging the device into a standard outlet can block or limit access to the adjacent socket, especially with larger three-prong plugs or USB power bricks, which is a notable physical design limitation.
Ease of Use
The included manual offers helpful tips on measuring power usage effectively, such as understanding when devices consume power and when they don't, which supports precise energy tracking.
#3
8.2 score

P3 International P4456 Kill A Watt Flex Plug-in Electricity Usage + Power Consumption Monitor, Watt Voltage Tester, Electrical Energy Saving Monitor with Auto Cost Calculator

P3 International P4456 Kill A Watt Flex Plug-in Electricity Usage + Power Consumption Monitor, Watt Voltage Tester, Electrical Energy Saving Monitor with Auto Cost Calculator

KILL A WATT

8.2 score

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The P3 International P4456 Kill A Watt Flex is a convenient and user-friendly device for tracking how much electricity your appliances consume. One of its standout features is the easy-to-read LCD screen that not only shows power usage in watts but also converts this information into estimated costs over different time frames—day, week, month, or year—which helps you understand the impact on your energy bill. Its plug-in design makes it simple to use without needing any complicated setup or batteries.

Rating
8.2
Accuracy
Display
Data Logging

Most important from
71 reviews

Accuracy
Exceptional accuracy and affordability make this tool a worthwhile investment for monitoring home energy usage.
Display
The device clearly shows power consumption and estimated costs over daily, weekly, and monthly periods, helping to identify expensive appliances.
Data Logging
Built-in memory retains data after unplugging, allowing users to track energy consumption over time without losing information.
Connectivity
Though it lacks advanced features like Bluetooth or Wi-Fi connectivity, it delivers reliable and practical energy monitoring for typical household devices.
Ease of Use
Despite the lack of a detailed manual, the meter’s functionality is straightforward once the cost input is figured out, providing valuable insight into appliance efficiency.

Top 10 Best Kill A Watt Meters 2026 in the United States

#1

Winner

10.0  score
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KILL A WATT

Kill A Watt Connect P4498 Electricity Usage Monitor Power Consumption Meter with Two Piece Housing and 35 Inch Cord for Easy Use

Accuracy: +/-0.3%
Measurement Range: volts, current, watts, frequency, power
Display: clear and user-friendly
Ease of Use: simple to operate

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Chosen by 1266 this week

#2
9.7  score
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MECHEER

Upgraded Watt Meter Power Meter Plug Home Electricity Usage Monitor, Electrical Usage Monitor Consumption, Energy Voltage Amps Kill Meter with Backlight, Overload Protection, 7 Modes Display-With Cord

Measurement Range: up to 3680W
Display: large backlit LCD screen
Data Logging: memory saves readings after power off
Connectivity: none
Ease of Use: setup needs pressing buttons together

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20% OFF
#3
8.2  score
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KILL A WATT

P3 International P4456 Kill A Watt Flex Plug-in Electricity Usage + Power Consumption Monitor, Watt Voltage Tester, Electrical Energy Saving Monitor with Auto Cost Calculator

Accuracy: performs well
Measurement Range: most home appliances
Display: LCD
Data Logging: built-in memory stores measurements
Connectivity: none
Ease of Use: plug-in design with cycle mode guide

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#4
7.9  score
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MECHEER

Upgraded Watt Meter Power Meter Plug Home Energy Monitor Electricity Usage Monitor, Electrical Usage Monitor, Energy Voltage Amps Meter Tester with Backlight, Overload Protection, 8 Display Modes

Measurement Range: up to 1800W
Display: backlit LCD, 8 modes
Data Logging: stores energy data, settings during outages
Ease of Use: reset holding button 5 seconds

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23% OFF
#5
7.9  score
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P3

P3 International Kill-A-Watt Electric Usage Monitor

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#6
7.9  score
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briidea

Electricity Usage Monitor, Briidea Power Consumption Watt Voltage Amp Meter Tester with 2 Outlets Electricity Analyzer Monitoring Device for Energy Saving

Accuracy: accurate real-time readings
Measurement Range: up to 1200W
Display: clear digital display
Data Logging: power-off memory
Ease of Use: simple plug-in operation

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#7
7.3  score
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NXQWLL

30A AC Power Meter, 125V L5-30P to L5-30R LCD Display Digital Multimeter Tester for Generator, Watt Ammeter Voltmeter, Current Voltage Frequency Power Factor Monitor

Measurement Range: Voltage 40-300V AC, Current 30A
Display: Built-in LCD
Ease of Use: Plug-and-play with 1.3-foot cable

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#8
7.0  score
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HBN

HBN Watt Meter Plug with Backlight, Plug-in Socket Power Meter Electricity Usage Monitor Consumption Home Electrical Energy Monitor, Voltage Amps Wattage Electricity Usage Tester, 9 Display Modes

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9% OFF
#9
7.0  score
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kuman

Upgraded Watt Meter, Home Electricity Usage Monitor, Plug-in Socket Power Meter, Power Watt Voltage Amps Meter Tester, Overload Protection

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5% OFF
#10
7.0  score
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SURAIELEC

SURAIELEC Watt Meter, Plug-in Socket Power Meter, Auto Cost Calculator, Backlit Large Display, Overload Protection, Kilowatt Wattage Voltage AMP Tester, Electricity Usage Electrical Energy Monitor

Accuracy: ±0.1W
Measurement Range: up to 1,950W
Display: large backlit display
Data Logging: 90-day data memory
Ease of Use: compact design

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32% OFF
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Buying Guide for the Best Kill A Watt Meters

Kill-A-Watt meters are devices used to measure the electricity consumption of appliances and electronics. They help you understand how much energy your devices are using, which can be useful for managing your electricity bills and reducing your carbon footprint. When choosing a Kill-A-Watt meter, it's important to consider several key specifications to ensure you get the right one for your needs.
AccuracyAccuracy refers to how close the meter's readings are to the actual power consumption. This is important because more accurate readings will give you a better understanding of your energy usage. Accuracy is usually expressed as a percentage. For most home users, a meter with an accuracy of within 1-2% is sufficient. If you need very precise measurements, look for meters with higher accuracy.
Measurement RangeThe measurement range indicates the minimum and maximum power levels that the meter can measure. This is important because it determines whether the meter can handle the power levels of your devices. For typical household appliances, a range of 0.1 to 1800 watts is usually sufficient. If you plan to measure high-power devices, ensure the meter can handle higher wattages.
DisplayThe display shows the readings and other information. A clear, easy-to-read display is important for quickly understanding your energy usage. Some meters have backlit displays, which can be useful in low-light conditions. Consider how and where you will use the meter to decide if a backlit display is necessary for you.
Data LoggingData logging allows the meter to record and store energy usage over time. This is useful for tracking long-term energy consumption and identifying trends. Some meters can store data for a few days, while others can store data for several months. If you want to monitor your energy usage over a long period, look for a meter with extensive data logging capabilities.
ConnectivityConnectivity refers to the ability of the meter to connect to other devices, such as smartphones or computers. This can be useful for remotely monitoring your energy usage and analyzing data. Some meters offer Wi-Fi or Bluetooth connectivity. If you prefer to manage your energy data digitally, look for a meter with these connectivity options.
Ease of UseEase of use encompasses how simple the meter is to set up and operate. This is important because a complicated meter can be frustrating and may not be used effectively. Look for meters with straightforward instructions, intuitive controls, and user-friendly interfaces. If you are not very tech-savvy, prioritize meters that are known for their simplicity.

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