Sharpeners
Best Electric Knife Sharpeners
What this is based on: published manufacturer specifications and retailer listings, cited on each product; the weight of professional and owner reviews across multiple retailers; and hands-on experience sharpening and cooking with knives of this type. We have not individually tested every model listed, we do not run instrumented sharpness testing, and we do not claim a test we did not run.
Quick picks
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 | Chef'sChoice Trizor XV Model 15XV Electric Sharpener | A drawer of German knives you will never hand-sharpen | 7.6 | |
| 2 |  Work Sharp Precision Adjust Elite | Repeatable angles without years of practice | 8.2 | |
| 3 |  King KDS Combination Whetstone #1000/#6000 | Your first stone | 8.4 |
The honest case for one
Most households have six to ten knives, all dull, and nobody willing to spend twenty minutes on a stone. In that situation an electric sharpener is a genuine improvement: a minute per knife, a repeatable result, and no skill required. A working 15-degree edge on every knife in the house beats a perfect edge on none of them.
They also do two things a stone cannot: serrated edges, and a complete reprofile from 20 degrees to 15 without an hour of grinding.
The cost, stated plainly
- Steel removal. A three-stage diamond machine removes considerably more steel per session than a 1,000-grit stone. Your knife has a finite number of passes in it.
- Imposed geometry. The machine grinds to its angle, not yours. Asymmetric grinds, single bevels and unusual profiles are flattened out.
- No feedback. You cannot feel a burr forming or tell when you are done, so you follow the instructions and hope.
- Counter space and noise. A 4.2lb appliance that lives somewhere.
Single-bevel knives (deba, yanagiba, traditional kiritsuke), any blade over roughly 61 HRC where microchipping is a real risk, and anything with a deliberately asymmetric grind. Also anything you would be upset to lose a millimeter of.
Which one
The Chef'sChoice Trizor XV Model 15XV is the one worth considering. Its three stages use 100 percent diamond abrasives to shape, then sharpen, then polish, and it produces a 15-degree triple bevel — the Trizor edge — rather than a Western 20. For someone with a mixed drawer who wants everything at 15 degrees in a few minutes, that is the right machine.
It is still imposing a geometry. If you want an angle you choose rather than one the machine chooses, a manual guided system is the better tool — the Work Sharp Precision Adjust Elite adjusts in one-degree steps from 15 to 30. Guided systems compared.
The verdict
If your household will never use a stone and your knives are Western, the Chef'sChoice 15XV is a defensible purchase and a real upgrade on a drawer of dull knives. If you own a Japanese knife you care about, keep it out of the machine and buy a stone for that one — a King KDS costs less than most electric sharpeners and will serve the knife for its whole life.
The full argument is on electric sharpener against whetstone.
The picks in detail
#1 · A drawer of German knives you will never hand-sharpen
Chef'sChoice Trizor XV Model 15XV Electric Sharpener
A three-stage diamond machine that converts a 20-degree Western edge to a 15-degree triple bevel in about a minute. It works, and it removes a lot of steel doing it.
What it does well
- Genuinely converts a 20-degree factory edge to 15 degrees, which most people cannot do freehand
- About a minute per knife, repeatable, no skill required
- Handles serrated edges, which stones cannot
Where it gives way
- Removes far more steel than a stone; a knife has a finite number of passes in it
- Cannot follow an existing asymmetric or single-bevel grind
- Bulky and loud on a countertop
Skip it if: A thin, hard Japanese knife. It reprofiles rather than follows, and on a single-bevel or a 61+ HRC blade that is damage, not maintenance.
| Edge angle | 15 degrees (Trizor XV triple bevel) |
|---|---|
| Stages | 3 — diamond shaping, diamond sharpening, stropping/polishing |
| Abrasives | 100% diamond in stages 1 and 2 |
| Serrated | Yes, supported |
| Dimensions | 10 x 4.2 x 4.2 in, 4.2 lb |
#2 · Repeatable angles without years of practice
Work Sharp Precision Adjust Elite
A clamped, angle-guided system adjustable from 15 to 30 degrees in one-degree steps, with five diamond plates, a ceramic and a strop. It removes the one variable beginners cannot control.
What it does well
- One-degree angle increments mean you can actually match a 15-degree Japanese factory edge
- Seven abrasive options covers repair through polish
- Angle repeatability is the thing beginners lack, and this supplies it
Where it gives way
- Clamp limits blade length and height
- Slower per knife than a competent freehand session
- A lot of parts to store and lose
Skip it if: Long or very tall blades. A clamp-and-rod system fights a 240 mm gyuto, and it is slow compared to a stone once you can hold an angle.
| Angle range | 15-30 degrees, 1-degree increments |
|---|---|
| Abrasives | 220, 320, 400, 600, 800 diamond plates + fine ceramic |
| Also included | Leather strop and ceramic rod for serrations |
| Clamp | V-Block |
| Storage | Carry case and Tri-Brasive rack |
#3 · Your first stone
King KDS Combination Whetstone #1000/#6000
The stone almost everyone learns on. Soft, forgiving, cheap, and it tells you loudly when your angle wanders.
What it does well
- Two useful grits in one block for the price of half a premium stone
- Soft binder builds slurry readily, which gives beginners real feedback
- Almost impossible to damage a knife on it
Where it gives way
- Dishes quickly and needs flattening often
- The soak is a real commitment — you cannot sharpen on a whim
- Slow on hard powder steels like SG2
Skip it if: Impatient people. The 1000 side wants a 10-15 minute soak before every session and the clay binder dishes fast.
| Grits | #1000 / #6000, combination |
|---|---|
| Binder | Clay |
| Soaking | #1000 side: 10-15 minutes. #6000 side: splash only |
| Size | 207 x 66 x 36 mm |
| Weight | approx. 956 g |
Common questions
Are electric knife sharpeners worth it?
Will an electric sharpener ruin my knives?
What angle do electric sharpeners use?
Can an electric sharpener do serrated knives?
Sources
Read next
Sharpeners
Electric Sharpener vs Whetstone
Sharpeners
Pull-Through Knife Sharpeners
Sharpeners
Guided Sharpening Systems
Whetstones & Skill
Best Whetstones for Kitchen Knives
Japanese Knives