I sharpened knives wrong for about two years before I figured out that “15–20° angle” means nothing if you don’t own a protractor and don’t want to eyeball it. Every guide says to hold the blade at the right angle; almost none of them tell you how to find that angle with your hands. Here’s how to do it properly, including the tactile tricks that actually work and the maintenance rhythm that keeps your knives sharp without constant re-sharpening.

If you cook four or more days a week, learning to sharpen at home will save you money on professional sharpening and give you consistently sharp knives instead of the dull-then-suddenly-sharp cycle most home cooks live with.

Affiliate note: We may earn a small commission if you purchase through product links in this article.

What you’ll need

Tools:

  • Dual-grit whetstone (1000/6000 grit is standard; expect $35–50 for a decent Japanese water stone like the Tojiro, or $50+ for a ceramic stone like the Shapton Pro that doesn’t require soaking)
  • Honing steel (10–12 inches; Victorinox makes a reliable one for $25–35)
  • Damp kitchen towel (to stabilize the stone)
  • Cutting board or paper (for testing sharpness)

Materials:

  • Room-temperature water
  • Paper towels

Optional but helpful:

  • Angle guide ($10–20 if you want training wheels for your first few knives)
  • A cheap duplicate knife to practice on

Honing vs. sharpening: what’s actually happening

Most home cooks think a honing steel sharpens knives. It doesn’t. Here’s the difference, and it matters for your maintenance schedule:

Honing realigns the blade’s edge. Imagine the edge as a series of microscopic teeth that bend slightly out of alignment as you cut. A honing steel straightens them back into place. This takes 30 seconds, removes no metal, and should happen 1–2 times weekly if you cook daily. America’s Test Kitchen’s testing confirms that regular honing stretches the time between true sharpenings from 4–6 weeks to 3–4 months for most home cooks.

Sharpening removes dull metal and grinds a new edge. This is what a whetstone does. Plan to sharpen 2–4 times per year if you hone regularly and cook often; less frequently if you cook lightly or own very hard steel (Japanese knives).

If your blade won’t cut tomato skin cleanly or crushes it instead of slicing, you need sharpening. If it’s slightly less sharp than yesterday but still functional, hone it.

Whetstone sharpening: the full process

Step 1: Prep your stone (and know which kind you own)

This is where I wasted my first attempt: I didn’t soak a stone that needed soaking, and the grit clogged immediately.

Japanese water stones (like Tojiro, King, or Suehiro brands) require soaking in room-temperature water for 10–30 minutes before use. Check your stone’s manual; some need only 5 minutes. The stone is ready when bubbles stop rising from it. Tojiro’s own sharpening guide specifies 10–15 minutes for their mid-range stones.

Ceramic or diamond stones (like Shapton, DMT, or Lansky) don’t require soaking. Spray the surface with water or wet it by hand. These stones are faster to prep and slightly more forgiving for beginners, but they cost $10–20 more on average.

Place a damp kitchen towel under the stone so it doesn’t slide during strokes. The stone should feel slippery to the touch.

Step 2: Find your angle without a protractor

The target is 15–20° for most Western kitchen knives (Japanese knives are often sharpened closer to 12–15°, but that’s advanced). Here are two methods that work by feel:

The matchbook method: Fold a standard matchbook in half and place it under the knife’s spine. The resulting angle between blade and stone is roughly 15–17°. Remove the matchbook and hold that position by feel. (I’ve also seen people use two stacked pennies under the spine; same idea.)

The tilt method: Start with the blade flat on the stone (0°), then tilt the spine upward slowly until the blade edge and spine feel symmetrically positioned relative to the stone. Most people naturally settle around 17–20° this way. It’s not scientific, but consistency matters more than hitting exactly 16.5°.

Practice on a duplicate knife or an old blade first. Your muscle memory will click in after 8–10 strokes.

Step 3: Sharpen on the coarse grit (1000-grit side)

Start at the heel (base) of the blade, near the handle.

  1. Place the blade against the stone at your chosen angle.
  2. Using light, controlled pressure—let the knife’s weight do most of the work—slide the blade forward and across the stone in one smooth motion. The blade should travel from heel to tip as it moves across the stone’s length. Think of it like you’re trying to shave a very thin layer off the stone.
  3. Repeat 5–8 strokes on this side.
  4. Flip the knife and repeat 5–8 strokes on the other side, maintaining the same angle.

Check for the burr: After 5–8 strokes per side, run your thumb very gently along the unsharpened edge (perpendicular to the blade, not along it). You should feel a slight ridge or curl of metal. That’s the burr, and it tells you the coarse grit has done its job. If you don’t feel it, do 3–4 more strokes per side.

Re-wet the stone every 3–4 strokes. A dry stone grabs the blade and makes it harder to control the angle.

Step 4: Refine on the fine grit (6000-grit side)

Flip the stone to the finer grit. This polishes the edge and removes the burr.

  1. Repeat the same motion—heel to tip, forward and across—but use only 3–5 strokes per side.
  2. The pressure should be even lighter than on the coarse grit.
  3. Wipe the blade clean with a damp paper towel.

Test it: A properly sharpened knife will slice through a sheet of paper cleanly (not sawing; one smooth draw). Or try slicing a ripe tomato—if the blade bites into the skin without crushing, you’re done.

Step 5: Clean up

Rinse the whetstone under running water to clear metal particles from the surface. Let it air-dry completely before storing. (Water stones can crack if stored wet and then frozen.)

Using a honing steel: the 30-second weekly habit

Person straightening a knife blade with a honing steel
Photo by Los Muertos Crew on Pexels

This is the maintenance that keeps you from sharpening every month.

  1. Hold the honing steel vertically with its tip resting on a cutting board or counter.
  2. Place the blade’s heel against the top of the steel at the same angle you used for sharpening (15–20°).
  3. Draw the blade downward and toward you in one smooth motion, as if you’re shaving the steel. The entire edge—from heel to tip—should contact the steel as it moves.
  4. Flip the blade and repeat on the other side.
  5. Do 5–8 passes per side. The whole process takes 30 seconds.

Wüsthof’s knife care guide recommends honing before or after each use if you’re cutting acidic or dense foods (citrus, squash, root vegetables), which dull edges faster. For general cooking, 1–2 times per week is plenty.

Common mistakes I’ve made (so you don’t have to)

Pressing too hard on the whetstone. I thought more pressure meant faster sharpening. It doesn’t—it just increases your chance of slipping and makes it harder to maintain a consistent angle. Light, controlled strokes are faster and safer.

Skipping the coarse grit. I once tried to sharpen a very dull knife using only the 6000-grit side because I was impatient. It took 20 minutes and produced a mediocre edge. The coarse grit removes metal; the fine grit polishes. You need both.

Inconsistent angle between strokes. This produces a wavy, uneven edge. If you’re struggling, buy a cheap angle guide for $10–15 (Lansky and Spyderco both make them). Use it for your first 2–3 knives until the angle becomes muscle memory.

Using a honing steel on a truly dull knife. If your knife won’t cut a tomato, honing won’t fix it. You need the whetstone. I’ve watched people hone a dull blade for five minutes and then wonder why it’s still dull—because honing realigns; it doesn’t sharpen.

When to sharpen at home vs. hire a pro

A sharp kitchen knife cleanly slicing through a ripe tomato
Photo by Mikhail Nilov on Pexels

DIY makes sense if:

  • You cook 4+ days a week (knives dull faster; the skill pays off quickly)
  • You own knives worth $30 or more per blade (cheaper knives often have uneven or very soft steel that’s harder to sharpen consistently)
  • You’re willing to practice on duplicates or old knives first

Call a professional if:

  • Your blade is visibly chipped or has a rolled edge—that’s beyond whetstone repair for most home setups
  • You own very expensive knives ($150+) and want a guaranteed factory-quality edge
  • You sharpen infrequently enough (once or twice a year) that the skill doesn’t stick between sessions

I sharpen my own everyday knives and send my one good Japanese chef’s knife to a pro once a year. That’s the split that makes sense for my use pattern.

What you’ll actually notice

A properly sharpened and regularly honed knife will:

  • Glide through tomato skin without downward pressure
  • Slice onions without crushing the layers (and making you cry less—the cell damage from a dull blade releases more tear-inducing compounds)
  • Feel noticeably lighter in your hand because you’re not compensating for dullness with grip pressure

The difference is immediate and, honestly, a little annoying—because once you’ve cooked with sharp knives for a week, dull ones feel like you’re working with a handicap.

Related: If you’re building out your tool maintenance skills, How to Remove a Stripped Screw: A 6-Step Escalation Ladder uses a similar kind of controlled, angle-aware hand pressure. And if you’re comparing kitchen tools more broadly, best knife sets under 100 covers which blades are worth sharpening in the first place.