Kitchen Knife Sharpening (Step-by-Step)

To sharpen a kitchen knife, secure a suitable whetstone, match its angle to the knife’s existing bevel, and use controlled strokes from heel to tip. Raise a small burr on one side, repeat on the other, then remove the burr with light strokes. Test the clean, dry edge on paper or a tomato, and store it safely.

Guided sharpeners and electric models can help hold an angle, but a whetstone gives you direct control over pressure and the edge. That control matters when a knife catches on food or crushes a tomato instead of slicing it. The goal is not to remove as much steel as possible. It is to restore a consistent, sharp edge without changing the blade’s shape.

In my teaching, the most common trouble is not a lack of strength. It is an angle that shifts during each stroke, or pressure that rises when the knife does not seem to improve. A steady setup and a clear stopping point make sharpening safer and more predictable.

Stone, Knife & Workstation Setup

Good setup prevents slipping and helps you keep a steady angle. Choose an abrasive that suits the knife’s condition, follow the stone maker’s care instructions, and protect the work area. Before you begin, check whether your knife is double-bevel, single-bevel, serrated, or ceramic. The method below is for most double-bevel steel kitchen knives.

Choose a stone and prepare the area

A whetstone is an abrasive block that removes small amounts of metal to form a new edge. Grit is a measure used to describe the abrasive’s coarseness. Grit numbers are not always directly comparable between brands, so treat these ranges as practical guides.

A fine stone cannot replace a coarse one when an edge needs substantial repair. For routine work, start with a medium stone if it can restore the edge. Use a finer stone only if you want a more refined finish; it is not required for every kitchen knife.

Follow the stone’s instructions. A soaking stone may need to sit in water before use. A splash-and-go stone should be wetted but not soaked. Do not guess: soaking a stone that should not be soaked may harm it. Set the stone on a stable, nonslip base, and keep a damp cloth under the base if needed. Protect the counter and keep the work area clear.

Check the knife’s bevel and angle

The bevel is the sloped surface that forms each side of the cutting edge. Many double-bevel Japanese-style knives use about 15 degrees per side, while many Western-style knives use about 20 degrees per side. These are starting points, not rules. Follow the maker’s angle guidance, or match the bevel already on the knife as closely as you can.

Set the knife down with the edge facing away from you. Clean and dry the blade so it is easier to handle. Keep your fingers on the spine or sides of the blade, away from the edge. If you are unsure whether your knife is single-bevel or double-bevel, check its maker’s instructions before sharpening; the method and angle may differ.

Sharpening Technique & Edge Refinement

Sharpening forms a new edge by removing a small amount of steel. Work with controlled strokes, light-to-moderate pressure, and a steady angle. First sharpen one side until you can feel a small, continuous burr on the opposite side. Then sharpen the other side and remove the burr with very light alternating strokes.

Step-by-step: sharpen both sides

1. Set the angle. Place the blade on the stone at the chosen angle. A simple angle guide can help you learn the position, but do not let it distract you from keeping the blade steady through each stroke.

2. Start at the heel. The heel is the part of the edge nearest the handle. Lay that section on the stone and move the blade so the working area travels along the abrasive. Use a stroke that covers the edge from heel toward tip. Keep the same angle as you move.

3. Work along the full edge. As you move the knife, adjust its position so the stone reaches the curved area near the tip. Do not lift the tip high or let it dig into the stone. Use light-to-moderate pressure, and keep the stone wet as its instructions require.

4. Check for a burr. A burr is a thin lip of metal pushed to the opposite side of the edge. After several strokes, carefully feel from the blade’s spine toward the edge, not along the edge. Check heel, middle, and tip. Stop when you can detect a small, continuous burr along the opposite side. A large burr is not the goal.

5. Repeat on the other side. Turn the knife over and sharpen the second bevel at the same angle. Use a similar amount of work, checking for a small burr along the first side. The burr confirms that the two bevels have met along the edge.

6. Refine and deburr. If desired, move to a finer stone. Use alternating strokes with very light pressure. The aim is to remove the burr, not create another one. Rinse and dry the knife before testing it.

Pressure, common mistakes, and example cases

Heavy pressure can remove more steel than needed and make it harder to hold a steady angle. Sharpening at an angle that is too steep can create an uneven bevel. With a powered sharpener, prolonged contact can heat a thin edge; do not let the blade become hot. If you feel unsure, pause and check the angle and stone before continuing.

Two common kitchen situations show how to choose a starting point:

• A knife that still slices but drags through a tomato: Try an 800–1,200 grit stone. Sharpen until you raise a small burr, then deburr. Starting with a very coarse stone may remove more metal than the job needs.
• A knife with a visible chip or a very dull edge: A 400–800 grit stone may be needed to reshape the damaged area. Work carefully and check progress often. If the damage is deep, a professional service may be the safer choice.

These examples are guides, not diagnoses. Blade steel, edge shape, and stone brand can affect how quickly the edge changes. A honing rod can help maintain an edge by realigning it, but it does not replace abrasive sharpening when a knife is dull or damaged.

Stone Cleaning, Knife Care & Safe Storage

After sharpening, remove metal particles and stone residue, then dry the knife before it touches food. Clean and air-dry the stone according to its care instructions. These small steps help protect the blade and stone, and they reduce the chance of corrosion, especially on carbon-steel knives.

Rinse the knife, wash it with dish soap, and dry it promptly. Do not leave a carbon-steel knife wet or dirty after sharpening or food preparation. Follow the stone maker’s directions for cleaning; some stones need different care, and not every stone should be soaked or scrubbed in the same way.

Keep the stone’s working face flat. A hollow or uneven surface can make it harder to maintain consistent contact with the blade. If the maker recommends flattening, use the specified method and check the surface as directed. Let the stone air-dry fully before storing it.

Store the knife so its edge cannot knock against other utensils. A blade guard, knife block, or suitable magnetic strip can help protect the edge; choose a storage option that holds the knife securely. Keep the knife out of reach of children, and carry it with the point down and edge turned away from your body.

Sharp-Edge Testing & Dining Presentation

A sharpness test checks whether the edge cuts cleanly without putting your fingers in its path. Test only after washing and drying the blade. Paper and ripe tomato are useful kitchen checks, but no single test proves that an edge is perfect. Look for a smooth, controlled cut rather than a dramatic result.

Test the edge safely

Hold a sheet of paper by one edge and make a gentle slice, keeping your other hand clear of the blade’s path. A sharp edge should cut without repeatedly catching or tearing. Do not test sharpness by running a finger along the blade.

You can also try a ripe tomato. Use little pressure and let the edge begin the cut. If the blade slips or presses the tomato flat, it may need more work or better deburring. A clean cut through the skin is a useful sign, but it does not show whether the bevel is even.

If the knife catches at one point, return to the stone and work that section with controlled strokes. If it cuts smoothly, stop. More sharpening is not automatically better, and unnecessary grinding wears away useful steel.

Special blade types

The steps above suit most double-bevel steel knives, including many stainless, carbon-steel, and clad knives. A serrated knife usually needs attention to its scalloped teeth rather than the full edge. A single-bevel knife has a different edge shape and needs maker-specific guidance. Ceramic blades also need specialized methods and abrasives. For these knives, consult the maker or a qualified sharpener rather than applying the standard two-sided method.

Conclusion and FAQ

The key is a stable stone, a consistent angle, and enough sharpening to raise a small burr, followed by careful deburring. Use the knife maker’s angle when available, choose grit for the edge’s condition, and stop once the knife cuts cleanly. Wash and dry the blade, then store it where the edge is protected.

How often should I sharpen a kitchen knife?

Sharpen when the knife starts to drag, crush soft food, or catch during a cut. Timing depends on how often you use it, the blade, and the cutting surface. A honing rod may help maintain an edge between sharpening sessions, but it cannot replace sharpening a dull knife.

What angle should I use to sharpen a knife?

Use the maker’s guidance if available. As common starting points, many Japanese-style double-bevel knives use about 15 degrees per side, and many Western-style knives use about 20 degrees per side. Matching the existing bevel is often better than changing the angle without a clear reason.

Should I soak every whetstone?

No. Follow the stone maker’s directions. Some stones need soaking before use, while splash-and-go stones should be wetted but not soaked. If the instructions are missing, check the maker’s guidance rather than assuming that all stones work the same way.

What is a burr, and how do I find it?

A burr is a thin lip of metal pushed to the opposite side of the edge as you sharpen. Carefully feel from the spine toward the edge at the heel, middle, and tip. Keep your fingers away from the cutting edge and stop once the burr is small and continuous.

Is a honing rod the same as a sharpener?

No. A honing rod can realign or maintain an edge, but it does not remove enough metal to repair a dull or damaged blade. Use an abrasive stone or an appropriate sharpening service when the knife no longer cuts well after honing.

Can I sharpen a serrated knife on a whetstone?

The standard two-sided method is not suited to most serrated knives. Their scalloped edges need specialized care. Check the maker’s instructions or use a qualified sharpener to avoid flattening or damaging the teeth.

How do I know when to use a coarse stone?

Use a 400–800 grit stone for a very dull or damaged edge that needs more metal removed. For routine sharpening, an 800–1,200 grit stone is often a better starting range. A finer stone will not quickly fix substantial damage.

How should I store a knife after sharpening?

Wash and dry it, then store it so the edge cannot hit other utensils. A blade guard, knife block, or secure magnetic strip can protect the edge. Keep the knife in a safe place where children cannot reach it.

(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)