How to Use a Knife Sharpener? | Sharpen It Right The First Time

Whether you just bought your first pull-through tool or you’re staring down a whetstone, the basic routine is the same: secure the sharpener, find your angle, and pull the blade through in smooth, one-way strokes. The mistake most people make is sawing back and forth or pressing down too hard, which tears the edge instead of refining it.

What Is The Proper Angle To Sharpen A Knife?

The angle you use depends on the knife and the sharpener, but most home cooks should aim for 15–20 degrees. Western-style knives typically sharpen best at 20 degrees, while thinner Japanese blades often take a finer 15-degree edge. Setting the blade at the right angle keeps the edge sharp longer and prevents uneven wear.

For powered pull-through sharpeners, there’s a different angle to think about. That’s how the knife orients to the device, not the final edge angle—the slots are already cut at the correct sharpening angle.

A Step-By-Step Guide To Pull-Through And Electric Sharpeners

Place the sharpener on a firm, level surface and hold it securely with your non-dominant hand. Then follow this sequence:

• Start at the coarsest stage if the blade is dull or nicked. Insert the blade at the entry slot with the edge facing down.
• Pull the knife toward you in one smooth motion, from heel to tip. Never saw back and forth.
• Repeat 3–6 times on the coarse stage, then move to the finer or honing slots.
• Finish with 1–2 light passes on the finest stage to polish the edge.

Keep your touch light throughout. Good Housekeeping notes that handheld sharpeners are gentler than electric ones, and that a lighter touch works better on both. Pressing hard removes too much metal and can leave the edge ragged instead of keen.

For electric sharpeners, the routine is the same but the tool does the pulling. Run the blade through each slot at a steady pace, letting the motorized wheels do the work. A stable surface matters even more with electric models, since the vibration can walk the device across the counter.

Whichever type you use, follow the blade’s curve so the heel, belly, and tip all contact the abrasive. Skipping the curved belly leaves a dull spot right where you need it most. After sharpening, wipe the blade clean to remove metal filings. If the knife feels rough or tears paper instead of slicing it, repeat the sequence starting at the coarser stage.

How Do You Test If A Knife Is Sharp?

The quickest test is slicing a piece of paper or a ripe tomato. A properly sharpened blade cuts through cleanly with light pressure; a dull one snags, tears, or crushes the tomato instead of slicing it.

If the blade still won’t hold an edge after a full sharpening cycle, the problem may be the sharpener itself, not your technique. The best electric knife sharpeners for home kitchens take most of the guesswork out of the process by guiding the blade at the factory-set angle. For anyone who sharpens often, that convenience is worth the counter space.

Common Sharpening Mistakes And How To Avoid Them

Most sharpening failures come down to four fixable errors. Too much pressure is the most common—let the abrasive do the work. Wrong stage order leaves a rough edge; only use the coarse slot when the blade is actually dull. Rushing the pull skips the tip or belly, and sawing back and forth hacks at the edge instead of steering it.

There’s also the question of whether your knife should be sharpened at all. Serrated knives and some specialty blades need different tools, and a honing rod is the better daily choice for a blade that’s just slightly off. Good Housekeeping’s knife sharpening guide recommends honing regularly and reserving full sharpening for when the edge genuinely dulls.

Finally, keep safety in mind. Secure the work surface, keep your fingers behind the heel of the blade, and handle the newly sharpened knife carefully—a fresh edge plus loose metal filings is a recipe for a cut.