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P3 P4400 Kill A Watt Electricity Usage Monitor

4.6 4.6 out of 5 stars 9,475 ratings

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Purchase options and add-ons

  • Choose from the Kill-a-Watt's four settings to monitor your electrical usage
  • Monitor your electrical usage by day, week, month, or year
  • Features easy-to-read screen
  • Electricity usage monitor connects to appliances and assesses efficiency
  • Large LCD display counts consumption by the kilowatt-hour
  • Calculates electricity expenses by the day, week, month, or year
  • Displays volts, amps, and wattage within 0.2 - 2.0percent accuracy
  • Compatible with inverters; designed for use with AC 115-volt appliances
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Additional Details

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Customer ratings by feature

Easy to use
4.8 4.8
User interface
4.8 4.8
Value for money
4.7 4.7
Energy efficiency
4.6 4.6
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P3 P4400 Kill A Watt Electricity Usage Monitor

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From the manufacturer

P4400

Electricity Usage Monitor

It's no secret that electricity bills are on the rise. With the P3 P4400 you can cut your energy costs and find out what appliances are actually worth keeping plugged in by finding power-wasting appliances. Simply connect any appliance to the Kill A Watt EZ, it will then assess how efficient each appliance really is.

P4400

Kill A Watt EZ Power Monitor

Calculate your homes cumulative electrical expenses and forecast by the day, week, month, even an entire year. Also check the quality of your power by monitoring Voltage, Line Frequency, and Power Factor. Now you’ll know if it is time for a new refrigerator or if that old air conditioner is still saving you money. With the amazing Kill A Watt EZ you’ll know 'Watts' killing you.

User Friendly and Easy to Install

P4400

Save on Your Electricity Bills

Unique Features
  • Easy to read large LCD screen
  • Accurate within 0.2%
  • Calculates cost and forecasts by week, month and year
  • Displays eight critical unites of measurements
  • Built in Battery Backup
Technical Specifications

Model: P4400

Operating Voltage: 115 VAC

Max Voltage: 125 VAC

Max Current: 15 A<

Max Power: 1875 VA

Weight: 5 oz

Dimensions: 5 1/8″ H x 2 3/8″ W x 1 5/8″ D

Kill A WATT EZ Power Monitor

Model P4400

With the P4460 you can easily identify which appliance in your home is costing you the most money. The Power Monitor also allows you to enter your Utility providers cost of electricity so you can monitor and pinpoint what each appliance is costing you.

Founded in 1987, P3 International is a privately owned manufacturer of solution oriented consumer products. For the last twenty five years we have strived to develop products that are easy to use and ahead of their time.

We are committed to manufacturing high quality products that appeal to a variety of different people, from the environmentally conscious to the more technologically minded consumer. With this philosophy driving us we are always looking for innovative new products which we can offer our customers.

Product guides and documents

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Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF ]

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P3 P4400 Kill A Watt Electricity Usage Monitor


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Product Description

Amazon.com

Empowers You to Save Hundreds on Electric Bills

Electricity bills are rising. Now you can cut down on costs and find out what appliances are actually worth keeping plugged in. Simply connect these appliances to the Kill A Watt, and it will assess how efficient they really are. The large LCD display counts consumption by the kilowatt-hour, the same as your local utility. You can calculate your electrical expenses by the day, week, month, even an entire year. Also check the quality of your power by monitoring voltage, line frequency, and power factor. Now you will know if it is time for a new refrigerator or if that old air conditioner is still saving you money. Kill A Watt can help you reduce your power bill and will help find power-wasting appliances so you are able to decide whether it is worth keeping them plugged in. For standard 115 VAC appliances only, 15 amps maximum, 125 VAC maximum.

Find Out How Much Electricity You're Using

The U.S Department of Energy reports that 20% of our electric bills come from items that are left plugged in when they are not in use, or items that are in standby mode. With the Kill A Watt P4400 we can monitor the energy eaters in our homes and cut down our electric bills at the same time. Plug whatever item you want into the device and it will tell you the efficiency of that item by displaying the kilowatt per hour. This device will help you determine which items are costing you the most to run. The Kill A Watt also calculates voltage, line frequency, current, and power factor. You can calculate your electric bill before you even receive it from the electric company.

Test The Quality of Your Home's Power

But measuring appliance consumption is just the tip of the iceberg. Because it can monitor voltage (Volt) and line frequency it can also test if an outlet is working, or evaluate the quality of the electrical power provided by your utility company. It can detect voltage drops around the house, help to predict brownout conditions or to make sure a new home's outlets are in working condition before escrow closes.

About P3 International

Founded in 1987, P3 International is a privately owned manufacturer of solution oriented consumer products. For the last twenty years they have strived to develop products that are easy to use and ahead of their time. Thanks to their customer-centric attitude and support from their clients, they have experienced steady growth over the past decade.

They are committed to manufacturing high quality products that appeal to a variety of different people, from the environmentally conscious to the more technologically-minded consumer. With this philosophy driving them they are always looking for innovative new products which they can offer their customers.

Their unique products have garnered much attention, in particular the Kill A Watt. Reviews of P3 products have been featured in newspapers such as
The New York Times and The Wall Street Journal.




Technical Specifications

  • Accuracy: +/- 0.2%
  • Input Power: 115 volts AC, 60 Hz
  • Max Current: 15 amps
  • Max Voltage: 125 volts
  • Max Power: 1875 VA
  • Dimensions: 5.1 inches long x 1.6 inches thick x 2.4 inches wide
  • Approvals: ETL (c), ETL (us)
  • Origin: China
  • Manufacturer Warranty: 6 months

WARNING:

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Important information

Legal Disclaimer

Warranty does not cover misuse of product.

Bulb Voltage

115 volts

Customer reviews

4.6 out of 5 stars
4.6 out of 5
9,475 global ratings

Customers say

Customers like the performance, accuracy, ease of use, quality and value of the tools. They mention that it works perfectly for their needs, it's especially good for monitoring energy usage, it tells you kWh and time of use plus other useful numbers such as current (A), power. They also appreciate the value for money, saying that it'll be a good investment for the money.

AI-generated from the text of customer reviews

1,802 customers mention1,569 positive233 negative

Customers like the performance of the tool. They say it works perfectly for their needs, is very useful, and is a solidly useful tool. Some say that the circuit works great and that it works well with seedlings. Overall, customers find the tool to be practical and enjoyable.

"...Ironically, it is also very useful in seeing which items draw the most while inactive as well as which devices take much more of a startup amperage..." Read more

"...Worked great. Now I will use it on other systems in my house." Read more

"...Now, as for the rest, this thing does what I want it to, and does it quite well...." Read more

"Works well. Flaws: plugs block the screen, lcd hard to read at most angles, it needs a backlight." Read more

1,039 customers mention908 positive131 negative

Customers like the accuracy of the tool. They say it's especially good for monitoring energy usage while the equipment is on standby, and most useful when investigating electrical power usage and verifying the power consumption of appliances. They also say it is a neat tool for assessing energy efficiency, telling you kWh and time of use, plus other useful numbers such as current (A), power, and determining the current draw or power consumption. It will also track the cumulative electricity used from the point you plug something in, and provides some really useful information.

"...ProsLCD is a nice size and easy to read.Has a wide power range. Operates on 115-125vac and handles up to 15A – 1875 VA...." Read more

"...this "Kill a Watt" and I am so impressed with ease of use and unequalled accuracy. Makes predicting usage over a day or week a breeze!" Read more

"...Useful to check during brownout conditions, simply because using some appliances during low voltage conditions can potentially damage them..." Read more

"This is an accurate, good quality elec usage monitor...." Read more

819 customers mention725 positive94 negative

Customers find the device very simple to use and enlightening. They say the settings and buttons make sense, and the display is easy to read. Customers also say it's a pretty neat device that helps with troubleshooting and answering questions.

"...Design is plug and play and extremely easy to operate.Comes with 6 month warranty.Wish ListBacklit display...." Read more

"...I started saving money the first week I began using this gauge. It's easy to use and gives you great information...." Read more

"...I bought this "Kill a Watt" and I am so impressed with ease of use and unequalled accuracy. Makes predicting usage over a day or week a breeze!" Read more

"...Knowledge is Power!This is easy to use & well worth every penny of its cost...." Read more

658 customers mention539 positive119 negative

Customers like the quality of the tool. They say it's surprisingly useful, easy to use, and gives great information. Customers also mention that it makes for an interesting experiment and provides other useful functions, like instantaneous voltage measurement. They also say it reveals interesting facts such as how much energy an amplifier consumes when idle. Customers mention that the tool is great for testing AC outlets voltage and more.

"...It's easy to use and gives you great information. You'll be surprised where your excess electricity is going. This gauge will tell you...." Read more

"...It reveals some insteresting facts such as how much energy an amplifier consumes when idle..." Read more

"This is an accurate, good quality elec usage monitor...." Read more

"...I think this gadget has potential for being useful...." Read more

456 customers mention412 positive44 negative

Customers find the value of the tool to be good for the money. They say the utility justifies the price, and the price is acceptable for a diagnostic tool. Customers also say it's an easy way to save money and is simpler than cheaper knockoffs.

"...Knowledge is Power!This is easy to use & well worth every penny of its cost...." Read more

"Decent price, and I may use it more in the future...." Read more

"...I know this is the low-end model and I appreciate that it is fairly inexpensive...." Read more

"...LED bulbs can save a TON of money over incandescent without the risk of mercury in fluorescents bulbs and LED will last forever unlike fluorescent..." Read more

335 customers mention108 positive227 negative

Customers are mixed about the readability of the tool. Some mention that the buttons are clearly marked, and the display is easy to read and understand. However, others say that the outdated design with a hard to read display may cause issues. The numbers are bolder and much easier to read in dim light and off-angle. However some customers also mention that it's difficult to read it under a table or far away from where they are.

"...2. the display can be hard to read, I often have to shine a light directly onto it, this is my main reason for giving it 4 stars..." Read more

"...matter is it makes this screen, with relatively small characters, difficult to see when using in receptacles below knee level...." Read more

"...ProsLCD is a nice size and easy to read.Has a wide power range. Operates on 115-125vac and handles up to 15A – 1875 VA...." Read more

"Works well. Flaws: plugs block the screen, lcd hard to read at most angles, it needs a backlight." Read more

156 customers mention88 positive68 negative

Customers are mixed about the electricity. Some mention that it gets them thinking about energy efficiency, saves quite a bit of power, and is perfectly adequate to demonstrate the power savings. However, others say that it's wasting electricity for no reason, and that it registers zero Watt or AMP.

"...I LOVE this device, because it's helped me logically evaluate actual energy usage, instead of just going by my "gut" feeling...." Read more

"...with this meter I have discovered that the Appliance energy rating is usually overly optimistic based on cost per Kwh that do not reflect any..." Read more

"...but it can also be used to save energy..." Read more

"...5- It does not have internal power, a second of disconnection will ruin all your accumulated measurement.My conclusion:..." Read more

153 customers mention5 positive148 negative

Customers find the backlight of the tool to be lacking. They mention that the display is not backlit, making it hard to tell which value is being displayed. Some customers also say that the LCD display is very dark and hard to read.

"...I knew this model did not have a light and don't usually deduct for such features but the fact of the matter is it makes this screen, with..." Read more

"The display is kind of small and dark. I have to face it squarely and shine a light on it to read it...." Read more

"...: plugs block the screen, lcd hard to read at most angles, it needs a backlight." Read more

"...Not as brilliant a display, but after awhile you don't even notice...." Read more

) Summary – I wanted something that was super easy to use and gave me a lot of ...
5 Stars
) Summary – I wanted something that was super easy to use and gave me a lot of ...
This is a review of the P3 P4400 Kill A Watt Electricity Usage Meter.(Measures 5.13”h x 2.38”w and 1.63” deep.)Summary – I wanted something that was super easy to use and gave me a lot of feedback as to my electrical uses of certain setups. For me, I wanted to check wattage – amps I was using on a single outlet powering numerous devices to ensure the line is not being over loaded. This thing is great and would recommend to anyone wanting to have a little more knowledge of their electrical device usage.As with all my reviews, I will update this should this develop any issues with ongoing use.ProsLCD is a nice size and easy to read.Has a wide power range. Operates on 115-125vac and handles up to 15A – 1875 VA.Can select to view volts, amps, watts/va, hz/pf and KWH. My needs for this was to identify watts of certain items (to calculate backup generator size), amps, volts as well as to find out KWH to estimate my electrical costs. You would just need to find your recent electrical bill or look up online to identify your particular cost. Ironically, it is also very useful in seeing which items draw the most while inactive as well as which devices take much more of a startup amperage such as laser printers.Design is plug and play and extremely easy to operate.Comes with 6 month warranty.Wish ListBacklit display.Increased amperage to approx. 20 to cover newer home wiring and loads.USB output for software based analysis and easy viewing.
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Top reviews from the United States

Reviewed in the United States on August 15, 2017
Item Package Quantity: 1Color: WhiteVerified Purchase
Customer image
5.0 out of 5 stars ) Summary – I wanted something that was super easy to use and gave me a lot of ...
Reviewed in the United States on August 15, 2017
This is a review of the P3 P4400 Kill A Watt Electricity Usage Meter.
(Measures 5.13”h x 2.38”w and 1.63” deep.)

Summary – I wanted something that was super easy to use and gave me a lot of feedback as to my electrical uses of certain setups. For me, I wanted to check wattage – amps I was using on a single outlet powering numerous devices to ensure the line is not being over loaded. This thing is great and would recommend to anyone wanting to have a little more knowledge of their electrical device usage.

As with all my reviews, I will update this should this develop any issues with ongoing use.

Pros
LCD is a nice size and easy to read.
Has a wide power range. Operates on 115-125vac and handles up to 15A – 1875 VA.
Can select to view volts, amps, watts/va, hz/pf and KWH. My needs for this was to identify watts of certain items (to calculate backup generator size), amps, volts as well as to find out KWH to estimate my electrical costs. You would just need to find your recent electrical bill or look up online to identify your particular cost. Ironically, it is also very useful in seeing which items draw the most while inactive as well as which devices take much more of a startup amperage such as laser printers.
Design is plug and play and extremely easy to operate.
Comes with 6 month warranty.

Wish List
Backlit display.
Increased amperage to approx. 20 to cover newer home wiring and loads.
USB output for software based analysis and easy viewing.
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2 people found this helpful
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Reviewed in the United States on January 25, 2024
Item Package Quantity: 1Color: WhiteVerified Purchase
One person found this helpful
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Reviewed in the United States on February 1, 2024
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Reviewed in the United States on December 2, 2015
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76 people found this helpful
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Reviewed in the United States on February 11, 2024
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Reviewed in the United States on October 30, 2022
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Top reviews from other countries

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Patrick Montague
1.0 out of 5 stars Non UK product
Reviewed in the United Kingdom on November 22, 2022
Item Package Quantity: 1Color: WhiteVerified Purchase
5 people found this helpful
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Tlojm
5.0 out of 5 stars Sencillo de usar
Reviewed in Mexico on February 23, 2018
Item Package Quantity: 1Color: WhiteVerified Purchase
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Tlojm
5.0 out of 5 stars Sencillo de usar
Reviewed in Mexico on February 23, 2018
Mide en tiempo real tu consumo. Te sorprenderás con algunos electrónicos que consumen aún apagados, así como cosas que consumen mucho y otras que no. Perfecto para el cálculo y/o control de tu consumo.
Al conectarlo te indica la salida de corriente, conectad algún aparato y te indica su consumo, e incluso sabrás los kwh desde que lo dejes conectado hasta que se desconecte.
Con los botones sabrás el voltaje, watts/vA, Hz, amperes y kw/h
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10 people found this helpful
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Phil
1.0 out of 5 stars Shouldn't Be Sold In Japan
Reviewed in Japan on January 19, 2021
Item Package Quantity: 1Color: WhiteVerified Purchase
6 people found this helpful
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Murray L. Vasilev
5.0 out of 5 stars These meters just work!
Reviewed in Canada on October 6, 2023
Item Package Quantity: 1Color: WhiteVerified Purchase
Rod
1.0 out of 5 stars Not useable in UK
Reviewed in the United Kingdom on August 25, 2021
Item Package Quantity: 1Color: WhiteVerified Purchase
27 people found this helpful
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