Watt Reader

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A Watt meters is a device used for measuring the power in watts of any given circuit. You can find these power meters in residential areas for determining the energy consumption and utility frequency.

Check out some cheaply accurate meters from the list below!

Cshidworld Watt Meter ($16.99)

This power energy meter displays the electricity usage in a facility. With the overload protection, when the power exceeds the safety value, the unit automatically shuts off the power supply to prevent damage. The unit also displays a graph which indicates the daily energy consumption in the last seven days. You can also calculate your electricity expenses with this meter.


  1. Operating Voltage: AC 120 V
  2. Max Operating Current: 16 A
  3. Current Range: 0.01 A – 19.999 A
  4. Power Range: 1 W – 3680 W
  5. Indication of Frequency: 46Hz – 65Hz
  6. Measurement of Consumption: 0.00kWh to 9999.99kWh
  7. Duration of Indication: up to 9,999 hours 59 minutes

“Initially, I think this power meter can help to keep electricity stable with that big electric equipment, but actually. This is only test tool to reflect energy information. As a function of the item itself, I had to admit that this kind of meter was very sensitive and accurate, I changed different home electric devices to test their watt and pressure, performed very well.
Cons: Don’t use in dark circumstance, there’s no light in led screen, I open my phone flashlight for seeing it in my garage.” – Amazon’s Customer Review.

Available here.

Tenergy Watt Meter ($15.99)

This high precision Watt meter comes with a power analyzer. The unit has a backlit LCD for assisting in dark areas and facilities. This device can measure 0 to 60 V as well as measures up to 130 amps of current. The unit provides real-time, eight continuous readings of Current (A), voltage (V), watts (W), amp-hours (Ah), watt-hours (Wh), peak amps (Ap), minimum volts (V), peak watts (W). The unit requires no configuration or programming.

“This is an excellent combination Meter. The wires are heavy duty and can carry all the Current. The meter is powered by the Voltage / Current in. This morning it needed to be reset because the Solar Panels, unlike Batteries, brown out overnight. Disconnected the Positive Input for 5 seconds and it was ready to go. If an optional battery is connected, it will remember the Data with 0 Volts in. Very well made by people that understand Power Circuits. This Unit can handle real loads. Easy to Connect, easy to read.” – Amazon’s Customer Review.

Available here.

Makerfire Watt Meter ($16.99)

This Watt meters and power analyzer prevent peak currents from the damaging battery, ESC, motors, wiring, and connectors. It also verifies that there is sufficient operating voltage under load. It can also check battery capacity health and confirms proper battery charging operation. You can additionally detect receivers and actual driving current so as to make sure whether a UBEC is needed.

“Soldered some ends on and tried it out. Very simple to use, logs voltage minimum, amp hours, and also Watt and amperage peaks on a scrolling basis and shows live voltage, amperage and watts. Will work perfect for testing my motors.” – Amazon’s Customer Review.

Available here.

Floureon Watt Meters ($15.99)

This plug power meter can calculate your power expenses of the appliances you are using. The unit displays volts, amps, and wattage accurately up to 3%. It has low power consumption with a built-in rechargeable battery. You can additionally measure various entities including power (W), energy (kWh), volts, amps, hertz, power factor and maximum power (W), time, days. The unit includes large bright integrated LCD with a cumulative kilowatt-hour monitor.

“I have several of these that we are using for a project. Through the course of the project, we opened them up and did a little reverse engineering. The metering in this product is done by a clone of the Cirrus Logic 5460 which is a utility grade meter chip. It is very accurate and stable, though overall accuracy depends on the calibration source. It records minimum and maximum usage, and the minimum is not always zero. It appears to record a low-water mark instead of registering a zero value. This makes them very useful. They are also convenient to use because they run on an internal rechargeable battery when disconnected from the power line. You can view all the recorded data after you unplug it from the wall, so you don’t have to crawl around on the floor to read the measurements. All-in-all an excellent and very hackable meter.” – Amazon’s Customer Review.

Available here.

Reliance Controls Corporation Watt Meters ($25.64)

This accurate digital Ammeter comes with a Wattmeter. You get a digital readout from 1.0 – 15.0 Amps and 125 – 1875 Watts. A long 26 inches cord reaches to remote electrical outlets while a natural slide-switch action instantly converts between Amps and Watts. This unit eliminates the need for expensive clamp-on meters and line splitters.

“When sizing for a generator or an inverter, you need to know not just the wattage used but the peak or surge watts used. Some items like air conditioners and refrigerators and lots of others will draw a lot of power when they first start up, then quickly settle down and useless while they run. Your source of energy has to be able to handle the peak usage which can be 2 or 3 or more times the average running usage. If you want to power several such items, your source of energy has to be able to handle the peak usage for *all* of them since eventually, they all may coincidentally crank up at once.

I have a giant, old vacuum cleaner that is an excellent example of this. When I fire it up, the lights in the room dim slightly for a few seconds, then return to normal. That’s the surge draw of that old vacuum starting up.

Anyway, this little goodie lets you see an appliance NIL the watts (or amps). However, it shows you the watts drawn in real time which don’t tell you the peak which is what you need to generator/inverter sizing. When you’re ready to check out the peak watts of the item you’re testing, sit and watch the display carefully and make a note of the highest value shown as the article is starting. Even if the wattage drops substantially after that, the high (peak or surge) wattage is what you need to be able to support. If you just look at the display after the item has passed its startup surge, you’re looking at the lower, average draw. So pay attention and you’ll find this to be very handy. It can either tell you that you need to spend more on your power source or replace some particularly power hungry older item (like my vacuum).” – Amazon’s Customer Review.

Available here.

Tenergy Watt Meters ($44.88)

Watt’s UP is a watt meters cum power analyzer, small and light, with accurate and precise measurements and 0.01 A current and 0.01 V voltage resolutions. The unit measures energy (Wh), charge (Ah), power (W), current (A) and voltage (V) for any rechargeable battery pack from 4 – 60 Volts, including Ni-Cd, Ni-MH, and SLA, and Li-Ion battery packs. It acts as a wire hence not affecting model’s performance. It has an integrated precision current sensing resistor, with only 0.001 Ohm resistance and circuitry drawing only 0.007 amps. Additionally, this device uses DSP to increase ADC resolution, and differential measurement amplifiers increase noise immunity.

“This item is marketed primarily by and in support of RC enthusiasts (toy makers and users). It, however, is not a toy and could cause harm if misused. I purchased the Watt’s Up meter to monitor large batteries powering telescopes, associated computers, heaters and lights. This is in an outdoor environment subject to cold and moisture. Follow the instructions and be prepared to be delighted. Perhaps one of the few items on the market which deliver exactly what it is designed to do. Because my application is at night, I wish it had a backlight, but that’s not a major problem. My astronomy gear is expensive, portable and uses DC power. The Watt’s Up allows me to see what my electronics are doing in the field, compared to what the manufacturers say they are supposed to do. That means an early warning for batteries, heaters, internal components (computers, motors and chipsets) and in the environment they are used. The Watt’s up is well made, weather resistant, and compact. During a session, it even records relevant data and continually updates itself. It won’t pour your coffee, but it will watch your DC systems better than you could without it. A very, very good buy.” – Amazon’s Customer Review.

Available here.

Bayite Watt Meters ($18.75)

This unit is a multimeter with a voltage test range of DC 6.5~100V and a current test range of 0~100A. The unit is capable of storing the data even when turned off. It has an integrated overload alarm function and a large LCD screen displaying voltage, current, active power, and energy at the same time.

Specifications By The Manufacturer:

  1. Working voltage: DC 6.5 ~ 100 Volts
  2. Measuring Accuracy: 1%
  3. Power Consumption: 0.2 W
  4. Measurement speed: 2 times/s

Test Range and Display format:

  1. Active Power test range: 0~10 KW
  2. Energy test range: 0~9999 kWh
  3. Voltage test range: DC 6.5~100 V
  4. Current test range: 0~ 100 A

“I finally got this installed between my solar panel and my charge controller. I’m, not an Electrician, far from it. I had to email customer service at Bayite with a few stupid questions. They were very prompt in their replies. They sent me a diagram of how to do what I wanted and it worked perfectly. I am attaching the picture in case anyone out there is trying to get a reading from solar to charge controller to the battery. Worked perfectly for me. Some quality people know their products and take the time to address installation questions quickly and courteously. The Product works well.” – Amazon’s Customer Review.

Available here.

Drok Watt Meters ($10.99)

This digital multimeter is capable of measuring seven quantities including voltage, current capacity, power. The dual monitor has an easy to read display making it incredibly easy to control the charge going into your appliance.

There are two USB outputs available used simultaneously. USB Output I can be utilized for device charging and data transfer. Whether you want to charge mobile devices, or you want to move data between the mobile device and PC, just plug a device in Output I. The Output II can charge your cell phones, tablet PCs, iPad and other USB devices. Output I support QC 2.0, 9 and 12 Volts charging.

This ideal multiple USB Detector can be used for capacitance checking, capacitance clear, over voltage and under voltage alarm, overcurrent, and short circuit alarm. Using DROK alignment tool, you can monitor output voltage and current of mobile charger cables, power use of Raspberry Pi or Arduino board, compare the performance of solar charger in different conditions. You can quickly test the power/quality of the chargers and USB cables.’

“I am super happy with this multimeter! I have so many USB to micro USB cables, USB to type c, USB wall adapters, and USB power strips. I have been using the ampere app, which seemed to work but constantly fluctuated, I wasn’t sure the cables were functioning properly. This one works!

I’ve been testing everything I can plug this into, since Wednesday. I’ve discovered which chargers are faster and that all the USB outlets on my power strip charge at the same rate. I had suspected they varied, thanks to the app I was using, but this shows them all as an output of 5v.

As the battery gets fuller, the rate of charge decreases. This is helpful when I am charging something like my Bluetooth speaker- when I notice the rate dropping slowly down to .10A, I know it’s pretty much full. I never realised this would be useful in that way, but I like it.

I still understand how to read this in comparison to ampere, but it’s already been incredibly helpful to me. For the price, I do wish I’d gotten this a year or two ago. Less time would have been wasted on slow cables.
” – Amazon’s Customer Review.

Available here.

Belkin Watt Meters ($34.59)

Belkin’s energy monitor can be used for tracking how much an appliance costs on yearly as well as monthly basis. It also shows the carbon dioxide emissions of the power plant as well as the inbuilt tracking feature monitors your actual device usage over time and projects the dollar impact on your electric bill. It is pre-loaded with US average electricity cost, and you can also set your rate from your electric bill. The 6-foot long cord allows you to place it near/on your table. The unit has a smart, user-friendly design and helps you well with your electricity bill.

“It works. It’s awesome. Able to use it in my garage to add extra overhead lighting without having to rewire.” – Amazon’s Customer Review.

Available here.

P3 Watt Meters ($19.74)

This unit connects to household appliances and assesses their efficiency. It also checks the quality of power by monitoring voltage, line frequency, and power factor. You can calculate your power expenses by the day, week or by month. 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 tool will help you determine which items are costing you the most to run. You can calculate your electric bill before you even receive it from the electric company.

Technical Specifications:

  1. Accuracy: +/- 0.2%
  2. Input Power: 115 volts AC, 60 Hz
  3. Max Current: 15 amps
  4. Max Voltage: 125 volts
  5. Max Power: 1875 VA

“I love this thing. Having recently moved out on my own, and just enjoying statistics, in general, I bought this to monitor my electric costs after two high electric bills in a row. The various results I found were quite surprising. My air purifier, which I bought here on Amazon, uses 85 watts all the time… 85 * 24 hrs * 30 days / 1000 watts = 61.2kWhr * $0.20 = $12.24 a month. Well, that’s quite a costly monthly addition I never thought of. And that’s just the beginning. My Vornado fan uses 45w my air conditioner, on high 6 (out of 12) spikes up to 1200 watts. Jeez. My computer, at idle with external drives, uses about 250w. When doing extremely fast things, like encoding a video, 310w. My light behind my computer desk, with five, 10-watt bulbs, doesn’t use 50-watts total. No, it uses 50-watts for the bulbs, PLUS 30-watts apparently just for the light unit to function. You too will find out all these things you never knew, and possibly save money by cutting out, or replacing energy guzzlers.” – Amazon’s Customer Review.

Available here.

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