10 Top-Rated Electric Knife Sharpeners That Revive Dull Blades, According to Reviewers

Shoppers say these handy gadgets make their knives look brand new
By Rebecca Carhart
September 11, 2020
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Knives are one of the most reached-for tools in the kitchen, which is why it’s so important to have a sharp blade on hand. But after a few months of continual use, even top-of-the-line knives can start to dull. While you could take them to a sharpening shop or a specialty cookware store, it’s much more cost-effective to invest in a knife sharpener, so you can sharpen your favorite blades any time you like. 

There are many types of knife sharpeners, ranging from manual machines to simple sharpening stones to ceramic rods, but we find that electric knife sharpeners are the easiest way to sharpen your knives from home. These high-tech gadgets will make the dullest blades razor-sharp again with just the push of a button. 

All electric knife sharpeners may be built to bring dull blades back to life, but some work best on specific blade types like ceramic or Japanese-style knives, while others are programmed to sharpen numerous blade types and sizes. Certain options can even sharpen kitchen shears or tools like screwdrivers or clippers, in addition to your knives. 

To help you figure out which model is right for your kitchen, we turned to customers who have bought and used these electric knife sharpeners for themselves. Each item detailed on the list below has both near-perfect ratings and countless rave reviews explaining why they are worth the money. 

From a professional-grade electric knife sharpener to an affordable model and an option that is super easy to use for beginners, these 10 electric knife sharpeners will keep your knives in tip-top shape.  

These are the best electric knife sharpeners to buy: 

Courtesy of Amazon

This Presto knife sharpener has earned itself over 4,300 five-star reviews from Amazon shoppers for a reason. Customers love how quickly and efficiently the machine sharpens their non-serrated knives and the fact that it is so user-friendly. The sharpener’s four blade guides hold knives at the ideal angle, while the two-stage sharpening system sharpens and polishes your blades in just seconds. “I am so happy with this little machine,” raved one shopper. “It’s not huge and bulky, not noisy. It fits just right on my kitchen counter. The best thing about it is the way it sharpens knives to a razor edge in no time. I sharpened 10 very old very dull paring knives that I thought were destined for the trash...Now if they get a little dull, it’s just a quick swipe and a few seconds and I have a super sharp knife again.”

To buy: $38; amazon.com

Courtesy of Amazon

This professional-grade knife sharpener from Chef’s Choice uses a three-stage sharpening system to bring dull knives back to life. The first two stages use diamond abrasives to hone edges, while the third stage smooths and polishes the blades. It works on both straight-edge and serrated knives and weighs less than five pounds, so it is easy to move around the kitchen.  At $150, it’s one of the pricier items on the list, but it does come with a three-year warranty in case you have any issues with the machine. One customer wrote, “I own 16 Wusthof knives that I had professionally sharpened twice a year, although they could have used more. At about $125 to sharpen them all I didn't feel bad about paying over $150 for a sharpener, and I figured I could do about as good as a pro. If you actually read the directions, it makes an unbelievably sharp knife. They were never this sharp even when brand new. It even works on the cheapest knives I have.”

To buy: $150; amazon.com

Courtesy of Amazon

If you have a variety of knives with different blade sizes that need sharpening, consider this Presto option. Along with a three-stage sharpening system, it also has three blade settings to choose from thin, medium, and thick, so you can easily find the correct angle for your knife’s thickness. It even uses a Sapphirite grinding wheel, which is the same material used in professional shops—so you know it will sharpen even the dullest knives. “This product works very well,” wrote one reviewer. “I had a set of knives about 15 years old and they got to the point of being very difficult to cut anything with, and had never been sharpened during that time. Rather than throwing them out and getting a new set of knives, I decided to try a knife sharpener. It made my knives as good as new again and made such a difference!” 

To buy: $55; amazon.com

Courtesy of Amazon

If your kitchen is stocked with ceramic knives, hundreds of Amazon shoppers recommend investing in this Kyocera knife sharpener. Unlike other options on this list that only work on steel blades, this option is specially designed to work on both ceramic and steel knives. It uses a diamond grinding wheel to quickly sharpen cutlery and comes with a covered compartment built-in that catches all the grinding dust, so you never have to worry about making a mess. “Really impressed,” raved one shopper. “When I bought my ceramic knife it was with the understanding it would have to be sent out, at a cost almost equal to the cost of the knife to have it sharpened. I bought this on the off chance I could avoid that. There's nothing that cuts like a sharp ceramic knife, and I did not realize how dull my knife had gotten until I used this sharpener. I can actually slice a 1-inch grape tomato into four slices without squashing the tomato.”

To buy: $39; amazon.com

Courtesy of Amazon

This popular Chef’s Choice hybrid model works as both an electric and manual knife sharpener, so you can sharpen your knives in two different ways. The beloved product works on both straight edge and serrated knives, as well as 15- and 20-degree class knives, pocket knives, and hunting knives. It combines diamond abrasive wheels with CrissCross sharpening technology to deliver razor-sharp blades in no time. “I've used other knife sharpeners and I thought that I could make my knives sharp, [but] this one has made some of my knives sharper than I've ever seen in the 10 years I've had them,” raved one customer. “It's kind of hard to describe how sharp some of them got, I guess the best description I can give is that for the past 10 years my knives felt like I was cutting things. [With this sharpener] I was able to get two of my knives to the point where it didn't feel like I was cutting. They went through my tomatoes like they went through air; I've never had that experience before.”

To buy: $132; amazon.com

Courtesy of Williams Sonoma

Japanese-style knives are known for being super lightweight and razor-sharp, and this Kai Cube electric knife sharpener will keep them that way. The compact sharpener’s slot guides will keep your blades at the correct angle so you can achieve the perfect 16-degree angle Japanese knives are known for. The white alundum whetstone revives dull blades, while the finishing stone smooths them for a sleek, polished finish. “Received this as a gift, as I have a full [set] of Shuns. After using a whetstone previously, I must say this is just as efficient. I tried it with my kiritsuke, which has had a ding in the edge for some time (unfortunate sink drop). After a few runs through, then a quick honing, it was as factory new,” wrote one reviewer.

To buy: $100; williams-sonoma.com

Courtesy of Amazon

At only $34, this EdgeKeeper knife sharpener is a steal. The two-stage sharpener boasts diamond-coated sharpening wheels that are perfect for straight-edge steel blades. Shoppers love its compact size and the fact that it features non-slip silicone feet, so you don’t have to worry about it moving around as you sharpen your knives. Even better, it comes with a removable magnet that will catch the knife shavings making cleanup a breeze. “I have purchased over five very expensive manual and power driven sharpeners in the last couple decades. Some costing hundreds of dollars. They worked okay. This one...on first use...sharpened my Wusthof Chef knife to precision and easily passed the tomato test,” raved one customer. 

To buy: $34 (originally $40); amazon.com

Courtesy of Amazon

If your home has more items that need sharpening than just your kitchen knives, opt for this Work Sharp model. It will tune up your cutlery as well as multiple items from your toolbox. The powerful machine features a variable speed motor so you can adjust it to suit the needs of each blade and precision sharpening guides, which make it super easy to find the correct sharpening angle. And did we mention the multitasking product can sharpen gardening tools like mower blades and pruners too? It’s no wonder thousands of Amazon shoppers have given it their seal of approval including one who wrote, “This tool is one of the rare times in my adult life that I felt like I really got my money's worth out of a purchase. It does only one thing, but it does that one thing extremely well: It sharpens blades. It can sharpen pretty much any blade I've thought to test it on. Everything from chef's knives to hunting knives to garden tools. This is a precision tool that can remove a lot of the world's hardest steel very quickly.”

To buy: $70; amazon.com

Courtesy of Amazon

If you’ve never sharpened knives before and aren’t sure where to start, you might want to consider this user-friendly option by Wusthof. The product boasts pre-programmed control guides that will sharpen your knives with the touch of a button. The three speed-sharpener works on both straight-edge and serrated knives, and it comes with a one-year warranty. “I got this electric sharpener for Christmas, and it is amazing,” raved one reviewer. “Not only are my knives like new, I have been able to bring the edge back to a knife (the nice, big chef's knife, of course!) that has been dented and dinged through the course of a few cross-country moves. I thought that knife was a goner, but nope! The dents in the blade edge have almost disappeared. This machine takes all the effort and guesswork out of sharpening your Wusthof knives.”

To buy: $170; amazon.com

Courtesy of Amazon

We all know how important it is to keep our knives sharp, but don’t forget that your kitchen shears need a tune-up from time to time as well. Which is why we love this Thritop appliance that can sharpen knives, scissors, and even screwdrivers. Shoppers say it’s super easy to use and love how quickly it sharpens even the dullest blades. They also like that the handy gadget boasts non-slip feet and a retractable power cord. One shopper wrote, “I used it to sharpen all my knives: serrated. straight, scissors, small, and large. It sharpened them all. It was very easy to use and effective.” 

To buy: $25; amazon.com