Knife Sharpening 101: How to Keep Your Knives Sharp and Safe

A sharp knife is not only easier to use—it is also safer and more efficient. A dull blade requires more pressure, which can increase the risk of slipping and uneven cutting. Regular sharpening helps maintain the knife’s performance and extends its service life.

1. Why Do Knives Become Dull?

Every time a knife is used, the fine edge of the blade gradually becomes misaligned or worn. Cutting hard foods, using the knife on glass or ceramic surfaces, and improper storage can accelerate this process.

2. Sharpening vs. Honing

These two processes are often confused:

Honing realigns the existing edge of the blade.
Sharpening removes a small amount of metal to create a new, sharp edge.

For regularly used kitchen knives, a combination of honing and periodic sharpening can help maintain a consistent cutting performance.

3. Choose the Right Sharpening Angle

Different knives may require different sharpening angles. Common angles include 15°, 18°, 20°, and 25°.

15°–18°: Suitable for many fine-edged kitchen and Japanese-style knives.
20°: A versatile choice for many everyday kitchen knives.
25°: Often preferred for heavier-duty blades that need a more durable edge.

Always check the knife manufacturer's recommended angle when available.

4. Match the Sharpener to Your Knife

Different sharpening tools are designed for different needs. Manual sharpeners offer greater control, while electric sharpeners provide convenience and consistent results. Rolling sharpeners are another user-friendly option for home kitchens.

For premium knives, choose a sharpener with an appropriate angle and sharpening material to avoid unnecessary damage to the blade.

5. How Often Should You Sharpen?

There is no universal schedule. It depends on how frequently you use your knives and what you cut.

A simple rule is: if the knife starts requiring more force to cut or struggles to slice through food cleanly, it may be time to sharpen it.

Final Tip

A good knife sharpener is not about removing as much metal as possible—it is about restoring the edge efficiently while preserving the blade. Using the correct angle, suitable abrasive material, and proper technique can help keep your knives sharp, precise, and ready for everyday cooking.