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P3 P4400 Kill A Watt Electricity Usage Monitor

4.6 4.6 out of 5 stars 9,655 ratings
$40.61
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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
› See more product details

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There is a newer model of this item:

P3 International P4460 Kill A Watt EZ Electricity Usage Monitor , grey
P3 International P4460 Kill A Watt EZ Electricity Usage Monitor , grey
$29.00
(3,793)
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P3 P4400 Kill A Watt Electricity Usage Monitor

4.64.6 out of 5 stars 9,655
-9% $36.44
List: $39.95
In Stock
Sold by Timers Plus and ships from Amazon Fulfillment.
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P3 International P4460 Kill A Watt EZ Electricity Usage Monitor , grey
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4.44.4 out of 5 stars 3,793
$29.00
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4.6 out of 5 stars
9,655 global ratings

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Customers say

Customers find the product useful and easy to use. It accurately measures power consumption of any appliance and provides useful information about energy efficiency. They find it a practical tool for troubleshooting and checking items. The device is simple to set up and operate, providing useful feedback on electrical usage.

AI-generated from the text of customer reviews

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Works wellPower usageEase of useUseEnergy efficiencyValue for moneyBuild qualityReadability
2,279 customers mention "Works well"2,117 positive162 negative

Customers like the product. They say it works well, is easy to use, and saves money over incandescent bulbs. It's practical and enjoyable for them, and fun to test things around the house to see how much juice it draws.

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

"...It's a must-have tool for anyone interested in conserving energy and saving money." Read more

"Excelente producto" Read more

"Works great!" Read more

999 customers mention "Power usage"955 positive44 negative

Customers find the portable electric meter useful for checking the power consumption of any device plugged into it. It accurately measures the electricity usage of any appliance, including current, power, and Power Factor (PF). They say it's a great way to find out how much power household devices use from their phone. The meter also keeps track of the total number of kilowatt hours your device has used during the length of time.

"...and simple operation, this device allows you to accurately measure the electricity usage of any appliance...." Read more

"This is a pretty neat device that measures how many watts a device is using and keeps a total of kilowatt hours used over time..." Read more

"...It also keeps track of the total number of kilowatts hours your device has used during the length of time you have been monitoring the device...." Read more

"...Very reliable and easy to use, read and keep track of power consumption of everyday household electronics and appliances." Read more

794 customers mention "Ease of use"701 positive93 negative

Customers find the product easy to use and informative. It's simple to set up and read, with a nice size LCD that's easy to read. They find it a straightforward way to track home electric usage.

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

"...With its easy-to-read display and simple operation, this device allows you to accurately measure the electricity usage of any appliance...." Read more

"...Very reliable and easy to use, read and keep track of power consumption of everyday household electronics and appliances." Read more

"...It's a simple device, full of information when it's used. Once you know the information, it's adds to the office decor...." Read more

778 customers mention "Use"764 positive14 negative

Customers find the product useful for troubleshooting and checking items. They say it's practical and provides valuable information, especially on older items that may not be as energy efficient as they think. The device has many functions, which can provide an incentive to take action.

"...that will keep you entertained for a couple of days and give you some good information. Then you should lend it out to everyone you know!..." Read more

"...It's a real eye opener." Read more

"...Watching the numbers is valuable information. Left it plugged into a socket and forgot about it. Depends on the intent of use." Read more

"...As long as the case is not damaged, this is likely an easy repair for someone with this type of skill...." Read more

638 customers mention "Energy efficiency"523 positive115 negative

Customers appreciate the energy efficiency of the product. They find it useful for monitoring the power consumption of appliances and home devices. It provides a nominal minimum power requirement for each device and a maximum draw rating. Customers can use it to track real-time energy usage of home appliances in real time, including watts and amps used.

"...Thanks to this, I now know it's an energy SAVER. This could not be easier to use. Simply plug the meter into any wall socket...." Read more

"...Usage Monitor is a game-changer for anyone looking to take control of their energy consumption...." Read more

"...that measures how many watts a device is using and keeps a total of kilowatt hours used over time..." Read more

"...The P3 model is more than enough. It will give you how many watts your device is drawing, as well as the number of amps, number of volts..." Read more

356 customers mention "Value for money"313 positive43 negative

Customers appreciate the value for money of the product. They say it's an affordable way to measure energy consumption and cut their contribution to pollution. The built-in timer feature instantly tells you your KW/hr bill from what's running and how long.

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

"...It is easy to calculate how many tons of CO2 your electricity use produces...." Read more

"...The unit enables cost per KWH entry to calculate actual cost rather than just KWH Current is displayed xx.xxx vs. xx.xx for the P4400...." Read more

"...This one does not do that. It is okay though. It is simple math that you can do in your head or even on scratch paper...." Read more

267 customers mention "Build quality"165 positive102 negative

Customers have different views on the build quality of the product. Some find it reliable, easy to use, and dummy-proof. Others mention issues like poor construction of the ground, resistance when plugging in items, and being too bulky for limited space.

"...It is important to purchase a high quality power supply, but you definitely don't need a 750 watt power supply for a computer that draws 270 watts..." Read more

"...2. It is a little bit brick-like, so if you have limited room, you may want to get a short 3' or 6' grounded extension cord, if you can find one..." Read more

"...Very reliable and easy to use, read and keep track of power consumption of everyday household electronics and appliances." Read more

"These are accurate and reliable, and are a great way to find out how much power household devices from phone chargers to computers and refrigerators..." Read more

288 customers mention "Readability"25 positive263 negative

Customers find the display difficult to read. They mention it's dim and hard to see in dark corners. The display fades over time and requires crouching or crawling. The display is also difficult to read when unplugged.

"...They work great but over time the display fades and can no longer be used. Good for maybe a year." Read more

"...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

"...in back of the tree and since once unplugged this unit does not maintain its display (having no battery backup) nor does it have a back light on its..." Read more

"...Power is there, the dehumidifier runs, but no display for all measurement positions. I assume the display is "blown"...." Read more

It works fine
4 out of 5 stars
It works fine
It's definitely worth buying if you want to know how much something uses electricity. It's a simple device, full of information when it's used.Once you know the information, it's adds to the office decor.I did find out my office PC and it's two monitors are energy hogs and in a month it is probably 33% of my electricity costs, yikes!
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Top reviews from the United States

  • OK
    5.0 out of 5 stars Knowledge is Power: Manage Your Electric Bill the SMART and EASY Way
    Reviewed in the United States on May 11, 2015
    Item Package Quantity: 1Color: No ColorVerified Purchase
    Ever wonder how many watts an appliance is using? I have. That's why I bought this; I was wondering if my "tea machine" Tiger PDN-A50U Electric Water Dispenser, 5.0-Liter was an energy hog or a conservation appliance. Thanks to this, I now know it's an energy SAVER.

    This could not be easier to use. Simply plug the meter into any wall socket. Leave it there as long as you like and use this meter like an electrical outlet. When you want to measure an appliance's electricity use, you simply press the "Watt" button & the LCD display will show you the real-time wattage usage. For example, with my "tea machine," when it boils water, it uses about 900 watts. Once it stops boiling, it uses just .3 watts, on average, to keep warm. When dispensing, it uses 62 watts (to power an electric pump), then immediately reverts back to its .3 watt "keep warm" usage.

    This can also be used as a voltmeter (measuring the electricity flow INTO the outlet). For American household power, this is roughly around 120 volts (except in "brown out" conditions). Useful to check during brownout conditions, simply because using some appliances during low voltage conditions can potentially damage them (this, fortunately, rarely happens in the US, but some Californians have occasionally experienced this).

    There's also a purple KwH button. This will let you measure the KwH usage of an appliance over a period of time. If you have an appliance (say, like a stereo subwoofer) that you suspect might be a Vampire Power Energy Hog (one that uses a lot of power, even when turned off), you can easily confirm this suspicion by plugging it into this meter, pressing the KwH button, & then check in 24 hours and see how many KwH your appliance has consumed. If your subwoofer's an energy hog, just unplug it when you're not using it & you'll lower your electrical bills.

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

    This is easy to use & well worth every penny of its cost. In just a month, it more than pays for itself, if you've not been paying sufficient attention to your energy use. Now, instead of guessing how much power you're actually using to operate an appliance, now you can know. Great for everything from rice cookers, tea machines, toaster ovens, computers, printers, stereo equipment, battery chargers & more. A+!
    13 people found this helpful
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  • Branden Martin
    5.0 out of 5 stars Empower Your Energy Awareness with P3 P4400 Kill A Watt Electricity Usage Monitor
    Reviewed in the United States on April 9, 2024
    Item Package Quantity: 1Color: No ColorVerified Purchase
    The P3 P4400 Kill A Watt Electricity Usage Monitor is a game-changer for anyone looking to take control of their energy consumption. With its easy-to-read display and simple operation, this device allows you to accurately measure the electricity usage of any appliance. Whether you're trying to reduce your carbon footprint or cut down on your energy bills, this monitor gives you the insights you need to make informed decisions. It's a must-have tool for anyone interested in conserving energy and saving money.
    Helpful
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  • Jeffrey
    5.0 out of 5 stars Excelente
    Reviewed in the United States on November 30, 2024
    Item Package Quantity: 1Color: No ColorVerified Purchase
    Excelente producto
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  • brted
    4.0 out of 5 stars Neat Device - Could be better
    Reviewed in the United States on November 5, 2009
    Item Package Quantity: 1Color: No ColorVerified Purchase
    This is a pretty neat device that measures how many watts a device is using and keeps a total of kilowatt hours used over time (critical for things that use power in bursts like a refrigerator). I used it to measure how much power my HDTV receiver was using while it was turned off (15 watts!) and calculated that by using a remote control surge protector and unplugging the HD receiver when not in use, I can pay for the surge protector in 3 years. I was happy to learn that the standby power of my DVD player and home theater receiver were minimal. My old VCR uses a couple of watts just sitting there. I figured out that it costs me 2 cents to brew one cup of coffee.

    So this is a great thing that will keep you entertained for a couple of days and give you some good information. Then you should lend it out to everyone you know! Let everyone audit their own energy use. Every library or fire station should have these to lend out to people. Okay, off my soapbox now.

    The device itself needs some improvements. I know this is the low-end model and I appreciate that it is fairly inexpensive. But there is no reason in the world for this thing to block both plugs in a standard outlet. Yes, you can get an extension cord, but the design should be better. I was a little annoyed that it has three prongs, but I admit they probably don't have a choice since some devices that you plug in to it will need a ground. Second, just plugged in to the wall, the Kill a Watt reads 3 watts. While that is great to know, it totally messes up all the readings. My VCR on standby reads 5, but 3 of that is the Kill a Watt. Why do I want to know that? It should not be counting itself and I imagine that it also includes its own power usage in the kilowatt-hour running total. Memory and backlighting would be fine additions, but I don't really want to pay extra for them.

    So I think it can be useful for tracking down energy vampires (my laptop uses one sixth as much power as my desktop computer; I don't think I'll buy another desktop). It would be best if you can find somebody and borrow this from them, but if not this is a good purchase.
    2 people found this helpful
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Top reviews from other countries

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  • Henry L Fry
    5.0 out of 5 stars Works well
    Reviewed in Canada on September 22, 2024
    Item Package Quantity: 1Color: No ColorVerified Purchase
    This is a great tool for checking hz and amps draw on aplainces
    Report
  • Patrick Montague
    1.0 out of 5 stars Non UK product
    Reviewed in the United Kingdom on November 22, 2022
    Item Package Quantity: 1Color: No ColorVerified Purchase
    If you live in the UK, do NOT buy this product. It is not designed for the UK and you will have to return it. The company, so far, has refused to pay the return postage, even though this is entirely their mistake. I have no idea why it is not clearly labelled.
    Report
  • Jorge
    5.0 out of 5 stars Excelente producto.
    Reviewed in Mexico on August 1, 2018
    Item Package Quantity: 1Color: No ColorVerified Purchase
    Fantástica compra, cumplió todas mis expectativas y al tener un soporte de hasta 1.8kw me permite medir dispositivos de alto consumo.

    Quien iba a decir que mi PC (solo el gabinete) consume 4 veces mas que mi refri de 7 pies. Gracias a esta maravilla, ahora lo sé.

    Recomendadísimo, entrega en excelentes condiciones y vino empaquetado con su bolsa antigolpes.
    Report
  • Phil
    1.0 out of 5 stars Shouldn't Be Sold In Japan
    Reviewed in Japan on January 19, 2021
    Item Package Quantity: 1Color: No ColorVerified Purchase
    1. Operating voltage is incompatible with Japan's 100VAC.
    2. Seller support is poor and maker (P3) doesn't respond to emailed questions.

    A waste of money.
    Report
  • Customer
    5.0 out of 5 stars Works great
    Reviewed in Canada on November 3, 2024
    Item Package Quantity: 1Color: No ColorVerified Purchase
    Just what I needed, thank you
    Report