To use a knife sharpener, set it on a flat counter, put the heel of the blade in the slot, and pull straight back toward you to the tip with light pressure. Do that three or four times in the fine slot, and use the coarse slot only when the fine one has stopped working. Then test the edge on a sheet of paper. The other types follow the same rules with small changes, covered below one at a time.
First, which kind do you have?
There are five common designs. Each one moves the abrasive past the edge in a different way, and that changes the technique.
| Type | What moves | Typical abrasive | Example |
|---|---|---|---|
| Pull-through (countertop) | The knife, through fixed slots | Carbide (coarse), ceramic (fine), sometimes diamond | KitchenIQ Edge Grip |
| Handheld draw sharpener | The sharpener, along a still blade | Tungsten carbide V | AccuSharp |
| Electric | The knife, past spinning wheels | Diamond or Sapphirite wheels | Chef'sChoice 15XV |
| Rolling | A roller with discs, along a knife held on a magnet | Diamond disc, then ceramic or steel | AIERLIAN kit |
| Rod | The knife, down a steel or ceramic rod | Steel, ceramic or diamond | Utopia 12-inch rod |
Whetstones are a different skill. Our how to use a whetstone guide covers them.
How to use a pull-through sharpener
- Wash and dry the knife. Grease and food on the blade load up the abrasive.
- Set the sharpener on a dry counter and hold it by the handle with your fingers well above the slots. The KitchenIQ has a V notch so it can hang on the edge of the counter, which keeps a long chef's knife from hitting the countertop.
- Pick the slot. A knife that slips on tomato skin but still cuts goes in the fine slot. A knife that crushes bread or reflects light from its edge goes in the coarse slot first.
- Put the heel of the blade (the end near the handle) into the slot, with the blade straight up and down.
- Pull it straight back toward you in one smooth stroke, using light downward pressure. AccuSharp's FAQ says to tilt the tip slightly downward and to lift the handle as you reach the curve toward the tip, so the belly stays in contact.
- Lift the knife out and start again at the heel. Never push it back through or saw back and forth.
- Make three or four pulls, then check the edge. Move to the fine slot if you started coarse, and repeat.
- Wipe the blade. Fine steel dust clings to it.
Which slot is which on a 2-, 3- or 4-slot sharpener
Slot labels vary, but the order almost always goes coarse to fine from one end. Read the markings on yours.
| Sharpener | Slots | Use |
|---|---|---|
| 2 slots | Coarse carbide, fine ceramic | Fine for touch-ups; coarse, then fine, for a dull knife. The Smith's CCKS and KitchenIQ both work this way. |
| 3 slots | Coarse (often diamond or carbide), medium, fine ceramic | Coarse only for chips or a very dull edge. Most sessions start in the middle slot. |
| 4 slots | One scissors slot plus coarse, fine and a polishing slot | Knives never go in the scissors slot. The Longzon 4-stage lists its stages as scissors, coarse grinding, fine grinding and precision grinding. |
The handheld kind you draw along the blade
The AccuSharp works the other way around: the knife stays still and the sharpener moves. Rest the knife on a table with the edge up, hold it firmly by the handle, set the AccuSharp's V over the edge with your fingers behind its full-length guard, and draw it along the edge in one direction only with light pressure. A few strokes is usually enough once the edge matches its angle. AccuSharp puts that angle at about 21 degrees and says it handles serrated knives but not ceramic ones. When it stops cutting, the carbide blades can be reversed for a second life.
How to use an electric knife sharpener
Electric sharpeners have two or three numbered stages, each with a left and a right slot. A spring guide holds the blade at the angle, so your job is to pull at an even speed and alternate sides. The steps below follow Chef'sChoice's manual for the 15XV, which outsold every other electric model in our October 2026 Amazon search; most two- and three-stage models from other brands work the same way. Our separate guide on how to use a Chef'sChoice knife sharpener goes model by model.
- Set it on a counter and switch it on. Never hold it in your hand.
- Put the heel of the blade into the left slot of the stage you need, let the guide pull it against the wheel, and draw it toward you at a steady pace. Chef'sChoice suggests about three to four seconds per pull for a 5-inch blade, longer for longer knives. Don't stop partway.
- Make the matching pull in the right slot. One left plus one right is a "pair."
- Stage 1 is for dull knives only. The 15XV manual allows up to 20 pairs the first time a 20-degree Western knife is converted to its 15-degree edge, and far fewer after that.
- Stage 2: one or two pairs.
- Stage 3 (polish): three pairs, then two fast pairs of about one second each.
Next time, start in the last stage. The manual says a knife can be resharpened in Stage 3 alone three or more times before you need Stage 2, and Stage 1 only comes back when the edge is truly dull. That habit alone makes a knife last years longer on an electric sharpener. Use no oil or water.
Two-stage models like the Presto EverSharp 08800 are simpler: its listing says to draw the knife through each slot a few times, and it's for non-serrated blades only. For picks by budget, see the best electric knife sharpeners.
How to use a rolling knife sharpener
- Stick the knife to the magnetic block with the edge facing up and out, on the 15- or 20-degree side that matches the knife. Set the block on a stable counter. Tumbler's instructions suggest raising the roller on a cutting board when a tall knife puts the edge above roller height.
- Roll the diamond disc back and forth along the whole edge with light pressure, tip included.
- Turn the knife around on the block and do the other side the same amount.
- Switch to the honing disc (ceramic or steel) for a few passes per side. Tumbler caps this at six per side.
- Run a fingernail across the edge from spine side to edge. If you still feel a burr, repeat the diamond and honing passes.
- Wipe off the dark dust. Tumbler says that's normal and means the disc is cutting.
Expect the first session to take a while. Tumbler says 5 to 12 minutes for a knife in reasonable shape, and 8 to 10 more for one that hasn't been sharpened in a year, with later touch-ups under two minutes. Tumbler also rules out bread knives and scissors. The rolling sharpener guide has the angle table by knife brand.
How to use a sharpening rod
A steel rod like the Utopia mostly realigns the edge rather than sharpening it, which is why it's used a few times a week, not once a season. Stand the rod tip-down on a cutting board, hold the knife at about 15 to 20 degrees, and draw it down the rod from heel to tip, alternating sides, five or six times each. A ceramic or diamond rod does remove steel and can sharpen. The full method, with the angle trick, is in how to use a honing rod.
How many pulls each maker says
| Sharpener | Maker's count | Source |
|---|---|---|
| AccuSharp pull-through | 3 to 4 pulls, check after each; more for very hard steel | AccuSharp FAQ |
| Smith's CCKS 2-step | 3 to 4 strokes in carbide for a very dull blade, then ceramic | Smith's listing |
| Chef'sChoice 15XV, Stage 1 | Up to 20 pairs for a first conversion, fewer after | Chef'sChoice manual |
| Chef'sChoice 15XV, Stages 2 and 3 | 1 to 2 pairs; then 3 pairs plus 2 fast pairs | Chef'sChoice manual |
| Presto 08800 | "A few times" per slot | Presto listing |
| Tumbler rolling | Diamond until the burr forms; honing disc 6 passes per side at most | Tumbler instructions |
Blade Magazine's how-to suggests 10 to 15 pulls per stage on an electric. That's far more than Chef'sChoice asks for in its finer stages, so go with the manual for your model.
How to tell it worked
- Hold a sheet of printer paper by one corner and slice down through it. A clean cut along the whole length means you're done. Where it catches or tears, that section is still dull.
- Lay the knife on a ripe tomato. A sharp edge bites into the skin under its own weight.
- Feel for a burr. Run a fingernail gently off the edge on each side. A tiny catch on one side is a burr, a thin wire of steel the coarse slot leaves behind. Outdoor Life's main complaint about pull-throughs is that they leave one; a few light pulls in the fine slot, or a few strokes on a leather strop, take it off.
Still dull after a full session? The sharpener's angle may not match the knife's existing bevel, so it's only grinding the shoulder. Color the edge with a marker and make one pull: the Sharpie trick shows exactly where it's touching.
What not to put in a knife sharpener
- Ceramic knives. AccuSharp says its sharpeners can't do them, and Chef'sChoice's 15XV manual lists them as off-limits too.
- Scissors, except in a slot marked for scissors. AccuSharp sells a separate ShearSharp for them.
- Serrated knives, unless the maker allows it. Tumbler and the Presto 08800 don't; AccuSharp and KitchenIQ do, and so does Chef'sChoice in Stage 3 only. Our serrated knife guide covers the hand method.
- Single-bevel Japanese knives in a two-sided slot. The 15XV manual has you use one slot only for those; most people are better off with a stone.
- Thick cleavers and axes in a kitchen sharpener. The 15XV manual excludes both.
For the full case for and against, see whether pull-through sharpeners are bad for knives.
How often to sharpen
Hone often, sharpen rarely. Every pass through a coarse slot removes steel, and a knife that goes through Stage 1 every week will lose width visibly within a few years. Hone with a rod or the finest slot when the knife starts slipping on tomato skin, and step down to the coarser slot only when that stops working. Our guide to how often to sharpen knives has a schedule by knife and use.
Shopping for one? The best knife sharpener for beginners compares all of these types, and the manual pull-through picks sort the slot models by abrasive and angle.
Sources: AccuSharp, FAQ and instructions; Chef'sChoice Model 15 Trizor XV instructions (EdgeCraft); Tumbler, instructions; Outdoor Life, How to Use a Knife Sharpener; Blade Magazine, How to Use a Knife Sharpener. Product details from Amazon listings, checked October 15, 2026. How we research · Affiliate disclosure