Watt-Minder

Predict Energy Use in 18 Seconds!

The Watt-Minder is a family-friendly power meter that accurately predicts the hourly, monthly, and annual power consumption of any appliance. In just 18 seconds, after plugging your TV, computer, fan, refrigerator* or air conditioner* into the Watt-Minder, you will know exactly how much it will cost to run this year.

*Thermostatically controlled appliances should be measured for a longer period to obtain accurate estimates.

  • Quickly identify energy guzzling appliances
  • Double-check your power bill
  • Troubleshoot broken appliances
  • Teach kids about electricity
  • Conserve energy and save money
Everything you need is included:
Retail Value
Save 35% off the regular price and help fight Global Warming by Reducing Your Energy Usage
Watt-Minder $39.95
2 Packs — 4 Alkaline AA Batteries
(Use Coupon Code FPA212007GE to get Free!!!)
$9.98
Buy Now Retail Value: $49.93
Help Fight Global
Warming Sale Price
(plus S/H):
$32.44
You Save 35%: -$17.49

Slash Your Power Bill

Slash your power bill by identifying the energy guzzling appliances in your home or office, and turning them OFF when they are not needed.

  • Reset thermostats in your home and trace performance and costs of those individual heaters and air conditioners.
  • Expose the Hidden Cost. Most remote controlled electronics continue to use energy in the stand-by mode rather than turning off completely. Identify those electronic wasters of your energy dollars.

Reduce Your Energy Costs

Appliances Add Up to 20% of Your Power Bill

"Since getting the Watt-Minder and testing my old appliances, I decided to replace all of them with new energy efficient ones during my upcoming home remodel. I had no idea I could save energy this way." - Steve H, Cupertino, CA

According to the U.S. Department of Energy, home appliances account for 20% of your energy bill. But where is all that money going? And could you save money by changing small habits... or just buying a new appliance? Our research indicates you can.

For example, everyone needs a refrigerator... but do you need to overpay for it? The Watt-Minder can show exactly how much energy you're consuming each month and how much money you could be saving with an energy efficient model. Here's how:

  1. Measure your current monthly power consumption with the Watt-Minder
  2. Compare against the yellow Energy Guide rating of a new or used refrigerator.
  3. You'll instantly recognize if a new refrigerator could pay for itself in no time at all... and you'll be on the path to energy savings bliss!

Can You Trust the Label?

Energy Guide Label

As the old adage goes, you need to read the fine print. Uncle Sam requires manufacturer's to place a yellow EnergyGuide tag on every new appliance. This label displays the yearly energy consumption and operating costs... but can you trust it?

Manufacturer's often base their figures on "ideal" circumstances that don't reflect reality. The Watt-Minder can give you a more accurate reading before you buy the appliance.

  1. Take your Watt-Minder to the appliance store. Compare EnergyGuide labels to find the appliance that is most energy efficient and meets your needs.
  2. Ask the salesperson to plug the appliance into your Watt-Minder. - It takes only 18 seconds to begin to get an accurate reading of the total energy consumption and yearly cost.

In tests performed by Sierra Energy Products over three months, we found a 200% discrepancy in the EnergyGuide rating of box freezers compared actual operating costs.

Powerful Enough for Professionals

Watt-Minder on the Workbench

Most homeowners keep a power meter in the garage on the off-chance that an appliance goes bad or a socket needs repairing. But lets face it: traditional Multi-Meters are a pain in the toolbox for most projects that require a current reading. Unless you own an expensive clamp-on meter, you have to split the wire, cut it, measure it... and then repair the damage with a wire nut and tape. What a mess!

With the Watt-Minder, simply plug the meter in the wall and the appliance into the Watt-Minder. You get an accurate current reading stated in watts!

"As a designer and developer of electronic systems and products, Watt-Minder is great addition to my tool bench. It accurately measures current well under the threshold for many meter-based 'clamp-on' loops. I can't really justify a large $4000 Power Analyzer for my laboratory now that I have a Watt-Minder." - Larry W, Brentwood, TN

How Does it Work?

The Watt-Minder measures electric current ("amps") drawn by an appliance over time, then converts that figure to watts using simple math.

With it's simple, family-friendly design, the Watt-Minder makes it easy for anyone to enter the exact cost of electricity and predict the total cost of energy over days, weeks, months and years. For more accurate predictions, the Watt-Minder will continually measure an appliance for up to 30 days... creating an average of "on" and "off" time.

Special Offer

Save 35% on Your Watt-Minder Purchase and get Free AA Alkaline Batteries with the purchase of a Watt-Minder. (Use Coupon Code FPA212007GE — Limited time offer — while supplies last)


Only $32.44 plus shipping/handling

Buy Now

Frequently Asked Questions

Can I set the Watt-Minder for my local cost of energy?

Yes, the Watt-Minder can be set for the cost of electricity being charged to you by your utility provider. This increases the accuracy of the estimate provided by the Watt-Minder for your appliance usage costs.

How will I know if I am using too much energy?

The United States Department of Energy - Energy Efficiency and Renewal Energy provides sample usages of a variety of home appliances. Compare your appliance using the Watt-Minder with the data listed on this web site and the energy ratings of new appliances.

Can I use an extension cord with the Watt-Minder?

Yes, extension cords will not affect the operation of the Watt-Minder. Be sure and use an extension cord that is appropriate for the appliance being measured (grounded cords for ground appliances, and make sure the cord is heavy enough for the appliance being measured)

26 More Questions & Answers

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