The Best Electric Knife Sharpener – Consumer Reports

The most commonly used tool in any kitchen is a knife, so it’s important to keep the blade sharp and ready for its next task. You will find that a knife will start to dull after a few months of constant use. This can even happen to top of the line knives. And, while there are stores that will sharpen your knives for you, it’s much more cost-effective to have a knife sharpener at home in your kitchen.

You will find several types of knife sharpeners on the market including manual machines, ceramic rods, and simple sharpening stones. Of all the options, an electric knife sharpener is the easiest way to sharpen your knives from home. When you use these high-tech machines, you can make dull blades super sharp again by just pushing a button.

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When purchasing an electric knife sharpener, you will find some machines for certain types of knife blades while others can sharpen several blade sizes and types. It’s important to consider what types of knives you will use the sharpener for and what features and functions you are looking for the machine to have. Here are a few tips and reviews to help you find the best electric knife sharpener for your needs.

The Best Electric Knife Sharpener – Reviews

1. Presto 08800 EverSharp

Using an automatic design that is easy to use, the Presto EverSharp can sharpen sport knives and most non-serrated kitchen knives. Giving knives a razor-sharp edge, this sharpener uses a special two-stage system that precisely grinds knives into a perfectly sharpened angle. After that, it will fine hone and polish the knife’s edge to give you a professional result.

The unit is equipped with a non-slip base, present angles for accurate sharpening, and two sharpening levels to choose from including fine and coarse. Using rapidly rotating Sapphirite grinding wheels, the Presto EverSharp features blade guides that hold your knife at the perfect sharpening angle for both sides of the blade. Ideal for knives made of stainless steel, alloy, and carbon, this sharpener can also sharpen serrated knives that are only serrated on one side.

With three suction cups on the bottom, this sharpener is held securely on a countertop or table. It also comes with two receptacles under the unit to catch metal filings for you to dispose of. The Sapphirite sharpening wheel is the same super hard material that you find in professional knife sharpening shops, which can create a razor-sharp edge in just a few seconds.


  • It is easy to use and set up
  • This unit will make your knives super sharp
  • It’s professional level and uses a two-stage system

  • It tends to grind the blade too much

2. EdgeKeeper

Sharpening fine-edged knives if just a few seconds, the Edgekeeper Electric Knife Sharpener is efficient and compact. Using an advanced two-stage process, you are guaranteed precise results every time. Using handy blade guides, the knife positioned at a perfect sharpening angle to get the best results.

Using a removable magnet, this unit is able to catch all the metal shavings to make maintenance and cleaning easy. Perfect for stainless steel or carbon steel European and American style kitchen knives, the EdgeKeeper comes with non-slip feet to make sharpening safer, and it is ETL approved. This sharpener is intended for only sharpening fine-edge blades.


  • It’s easy to clean and can catch the metal shavings
  • This is a compact and efficient machine
  • It works quickly and provides super sharp edges

  • It doesn’t work on serrated knives
  • It gets pretty hot if you have to sharpen a lot of knives

3. Kyocera

Designed for either straight slicing or to dice vegetables, fruits, and boneless meat, the Kyocera is a steel knife that is appropriate to use on heavy rind type fruit because of the flex and force needed to slice them. With an innovative ceramic blade, you get a hardness that is not very flexible, but it’s the hardness characteristic that provides the blade with a long-lasting sharpness. The Kyocera offers home sharpeners equipped with a diamond wheel to help maintain a super-sharp cutting edge.

This easy to use sharpener does not require experience or special sharpening skills to operate. Using the assistance of an indicator light along with guide slots and assist rollers, the sharpener provides controlled pressure and sharpening. Created for refreshing of knife blades and at-home sharpening, the Kyocera Sharpener comes with handy knife slots and an assist roller that makes the sharpening process accurate.

Offering right-handed sharpening, the Kyocera is easy to clean and operate using a safety cover to contain all that grinding dust. The exterior is made with ABS plastic exterior, and this battery-operated sharpener using a diamond grindstone that sharpens knives to a medium or fine edge. Equipped with a #600 grit diamond grinding stone, this unit can take a 0.5mm nick off a ceramic blade to provide an optimal 35º cutting angle.


  • It is easy to operate and clean
  • You don’t need to have experience to use it
  • It gives knives a long-lasting sharp edge

  • The battery dies quickly
  • It isn’t powerful enough for steel knives

4. Chef's Choice 250

Using advanced Hybrid technology, the Chef’s Choice 250 gives you razor-sharp edges and combines both manual and electric stages. Featuring 100 percent diamond abrasives, this sharpener quickly applies a super sharp, arch-shaped edge. This unit is perfect for sharpening household and kitchen knives, pocket knives, and light sporting knives.

The Chef’s Choice 250 can sharpen both serrated and straight edge knives. It can create a triple-bevel edge through three successive stages. The first two stages are electric and use 100 percent diamond abrasives to sharpen two edge bevels while the last stage will polish and hone the third bevel by using ultra-fine diamonds to get a razor-sharp, arch-shaped.

Providing a professional edge that is more durable and stronger than conventional hollow ground or V-shaped edges, the Chef’s Choice 250 can be used anywhere at any time, even without power. This easy to use sharpener comes with a one-year limited warranty and is made in the U.S.A.


  • It can sharpen straight and serrated knives
  • It has a three-stage sharpening process
  • This sharpener gives you knives a professional edge

  • It takes a little practice to get used to
  • It doesn’t come with a cover

5. Narcissus

Faster, easier, and more efficient, the Narcissus Electric Knife Sharpener will easily become your household knife sharpener. Instead of tediously repeated sharpening, this electric sharpener will have your knives sharp four times faster. Using a pure copper motor, you get an incredible sharpening experience.

Using a 15-degree angled edge, you get the most cuts and performance than the typical 20-degree angled edge. With a thinner edge, it takes less effort to cut and the knife is easier to control. Featuring a rough surface corundum abrasive wheel, the Narcissus will quickly sharpen a knife blade, and it is also suitable for sharpening a cleaver or slicing knife.

With the Narcissus, you can choose either a quicken sharpening or finely sharpen for those chef knives, fruit knives, and santoku knives. The corundum abrasive wheel can sharpen straight knives perfectly along with slotted screwdrivers and scissors. Designed for home use, the Narcissus is compact and has a small footprint.

The Narcissus also comes with safety features including a five-minute overheat protection function. Offering you professional results, this knife sharpener not only sharpens knives but improves the durability and strength of the knife. With its pure copper motor, the Narcissus Electric Knife Sharpener will achieve outstanding sharpening effects.


  • It comes with a safety feature
  • It offers professional-level results
  • This sharpener makes your knives stronger and more durable

  • It won’t fit all your knives
  • It has too much wiggle room

How does a Knife Sharpener Work?

Typically, an electric knife sharpener will have either a two or three-stage process offering designated slots for each of the different stages. First, to remove damaged and dull parts, a coarse abrasive material called grinding is the first step of the sharpening process. After that comes the honing process that will smooth out the blade.

After the blade is ground in the first step, materials will be removed from the blade, and it will form a wire edge that is not smooth or durable. With the second step, you will see honing where small blemishes are removed and the edges are made more durable. A stone is used in the second step using a fine grit that is often compared to a coarse grinding stone, which is why a good knife sharpener needs to have separate slots for honing and grinding to gain those professional level sharpening results.

How Often Should You Sharpen Your Knife?

There is no real answer to this because there are several factors that will determine how often you need to sharpen specific knives. First, consider how much you use the knife, if it’s not often, you will only need to hone it once a week. As far as grinding it, you won’t need to do it as often since grinding a knife too frequently will actually remove too much material off of the blade and damage it.

Typically, you want to grind a knife once or twice a year and hone and polish it more frequently, which, of course, will depend on your use. You also need to determine how often to sharpen a knife for the purpose you use it. So, if you chop hard items like bones, your knife will need more maintenance than a knife that is used for cutting soft items.

An easy way to determine your knife needs sharpening is if it squishes soft things like tomatoes since it should easily slice right through it. You can also take your thumb and feel the blade of the knife to see if you feel any burrs on the edge of it.

Types of Knife Sharpeners

A manual knife sharpener is where you personally sharpen the knife. Requiring some basic skills, a manual knife sharpener will sharp your knives well, but it will take some time. The number of knives that you can sharpen one day manually will depend entirely on how fast the person that is sharpening the knives is. Plus, they are typically pretty affordable.

In comparison, an electric knife sharpener uses electricity to sharpen a knife, and they work pretty quickly. Typically, an electric knife sharpener will sharpen specific knives, and they also tend to be more expensive than manual knife sharpeners.
Remember that owning your own knife sharpener will end up saving you money in the long run if you compare it with paying a local business to sharpen your knives or even having to buy new knives.

Considerations When Choosing an Electric Knife Sharpener

Sharpening Stages
Typically, electric knife sharpeners will have either two or three stages. Stages refer to the number of slots you need to place the knife in before it’s completely sharp and polished. The number of stages also affects the preciseness of the sharpening and how complicated or easy the process is.

With a three-stage sharpener, a knife will be sharpened, honed, and polished giving you a more precisely sharpened knife. In comparison, a two-stage sharpener is easier to use, but won’t offer as much precision making them a good choice for use at home while a three-stage sharpener is better for professionals.

Sharpening Abrasive Type
You will find that most sharpeners come with either a Sapphirite or diamond abrasive sharpening wheel. While the diamond abrasive wheel may sound the best because it’s the hardest material, it isn’t always true. Typically, diamond abrasives are ideal for coarse grinding, however, it can be too aggressive if you want to do precision grinding. It might even damage a delicate knife because it’s too hard.

In comparison, Sapphirite sharpening wheels can be less aggressive while still performing the job well. Another option is an abrasive belt that some electric knife sharpeners have been using that gives you more flexibility. The abrasive belt can sharpen any type of blade, not only straight ones. So, if you are looking to sharpen a variety of blades and knives, look for a sharpener that uses a flexible abrasive belt.

Angle Guides
When you sharpen a knife, you are required to hold the knife at a precise angle to ensure that the edge becomes sharp. And, if you are interested in controlling the sharpness of your knife, you will want that angle to be precise.

This is what an angle guide is for. With fixed angle guides, you won’t have to hold onto the knife or even worry about it sitting at the correct sharpening angle. Typically, a knife sharpener will automatically do this making them pretty easy to use.

Knife Compatibility
Typically, an electric knife sharpener will work well with a regular kitchen knife and straight-edged blades. If you plan to sharpen non-kitchen knives or serrated or curved blades, you will need to do your research and find a knife sharpener that will work with those types of knives as well. Usually, you will only find premium knife sharpeners that are able to sharpen all types of knives.

What to Look for in an Electric Knife Sharpener

With so many brands of electric knife sharpeners on the market, it can be hard to tell the difference between quality electric knife sharpeners and bad ones. This can cause you to spend a lot of time researching to find the best electric knife sharpener for your needs. One this is certain, buying the best electric knife sharpener will help you to save you money and time in the long run.

Types of Knives

There are various types of electric sharpeners to be able to sharpen different types of knives. The knife type will determine what type of electronic knife sharpener you need to buy. It can also be helpful to ask for help when you are in the store to make sure you purchase the right type of electric knife sharpener.

Single-sided vs. Double-sided Electric Knife Sharpeners

There are several different features between these two types of electric knife sharpeners. With a single-sided electric knife sharpener, it will have a flat bevel that is perfect for sharpening serrated knives. But, a single-sided electric knife sharpener can often scratch knives, so the whole sharpening process can be less effective. In comparison, a double-sided knife sharpener is easy to use thanks to its very simple rotary mechanism.

Multi-Stage Electric Sharpeners

Some electric knife sharpeners can leave scratches on a knife or remove scratches. Designed to buff and remove scratches, these specific electric sharpeners leave your knives perfectly sharp and honed. This is important that you choose one with the kind of features you would like for your electric knife to have to make shopping easier.

Electric Scissor Sharpener

Knives aren’t the only thing you may want to have sharpened. You can also find electric sharpeners that can sharpen sewing crafts and scissors.

Knife Sharpening Facts

It’s a common misconception that sharpening a knife is hard to do and time-consuming. This is really a myth. In reality, knife sharpening is super easy and anyone can sharpen a knife, even if you don’t have experience or are using inexpensive tools. Plus, having sharp knives makes preparing food easier and is also safer.

Kitchen Knives

A kitchen knife is the most important tool in any kitchen. A kitchen knife is designed so that it will last a long time, however, they do become dull and blunt after a while and can make cooking messy. If you use a sharp knife in comparison to a blunt knife, you will see a huge difference when preparing food. Plus, you have a higher possibility of getting injured, so it’s important for your safety to have a knife sharpened in your kitchen to keep your knives sharp and ready to use.

Tips on How to Handle Kitchen Knives

Having a blunt knife can be a huge problem for any chef when you are preparing food. It’s not difficult to have sharp knives in your kitchen all the time. You just need to have an effective knife sharpener available in your home to hone and sharpen your knives.
Here are a few tips on how to safely use kitchen knives:

  • Train yourself on how to safely use a kitchen knife
  • Ensure that you are using a knife that is appropriate for the task you will be performing
  • Make sure you cut food items on stable surfaces
  • Carry your knife facing downward
  • Be careful when you wash a knife since it can cause a serious cut
  • Store your knives securely right after use
  • Use protective gear in order to minimize risk

How Important is it to Sharpen Your Knives?

  • It’s actually pretty important, and safer, to have sharp knives in your kitchen. Plus, your knives work so much better when they are sharp. It’s not fun to smush soft food items because your knife is too sharp. When you use less force to cut food, you won’t end up damaging them. A dull knife can also slow down how quickly you prepare food. And, using a sharp knife is a lot more fun since it’s less frustrating.
  • Did you also know that having sharp knives is safer than dull ones? When your knife is sharp, it won’t slip. This makes it easier and safer to chop vegetables and control slicing. With a dull knife, you can cause some pretty serious injuries since you have a much higher possibility of the knife slipping away from what you are cutting. That’s why it’s important to regularly sharpen your knives.
  • You can also make better-looking food with a sharp knife. Food that is slicked with a blunt knife will look smushed and unappetizing while food that is sliced with a sharp knife can look appealing and appetizing.
  • It’s also pretty easy to sharpen a knife. If you have an electric knife sharpener, it is super easy to learn and not very time-consuming. Plus, it’s cheaper than buying new knives all the time when the old ones become blunt.
  • You also get better control of a knife’s sharpness and edge. With an electric knife sharpener, you can control the shape of the edge’s bevel, so you can shape it to suit the way you use your knife.

How do Knives Become Dull?

While some people believe that a knife will never be really sharp, that’s not always true. There are several ways that you can cause your knives to become dull faster including:

  • Make sure to store knives sheathed in a utensil drawer. Not only does this protect you from cutting yourself, but it also keeps your knives from becoming dull. A sheathed knife will not rub against other items in the drawer like an unsheathed knife will. It’s best to store knives in a knife block or on a magnetic knife strip.
  • Slide your knife across a chopping board in order to clear away items you have already chopped. While this is common, it can make your knife dull. Instead, try flipping over your knife to clear the chopping board to stop your knife from dulling quickly.
  • Put knives in the dishwashers. Did you know that knives weren’t mean to go into a dishwasher? Dishwasher detergents tend to be pretty abrasive, plus any banging around that happens while the machine is running isn’t good for a sharp knife. It can easily ruin your knife’s sharp edge, and you won’t even notice.


The winner of the electric knife sharpener roundup is the Presto 08800 EverSharp. With its automatic and easy to use design, this sharpener can sharpen sport knives and most non-serrated kitchen knives with a razor-sharp edge. Using a special two-stage system, it precisely grinds knives into a perfectly sharpened angle before polishing and honing the knife’s edge for a professional result.

The unit is equipped with a non-slip base, present angles for accurate sharpening, and two sharpening levels to choose from including fine and coarse. Using rapidly rotating Sapphirite grinding wheels, the Presto EverSharp features blade guides that hold your knife at the perfect sharpening angle for both sides of the blade.

Perfect for knives made of stainless steel, alloy, and carbon, this sharpener can also sharpen serrated knives that are only serrated on one side. It also comes with two receptacles under the unit to catch metal filings for you to dispose of. The definite winner of the electric knife sharpener roundup is the Presto 08800 EverSharp hands down.