Whetstones Explained: Grits, Types, and How to Use Them

By the Knife Sharpener Guy Editorial Team · Reviewed against our editorial standards · 7 min read · Last reviewed 2026

Whetstones are among the most effective and traditional tools for sharpening knives, offering control and excellent results. Yet with different grits and types, they can seem confusing to beginners. Understanding how whetstones work makes them approachable and rewarding. This guide explains what grits mean, the types of whetstones available, and how to use them to sharpen knives effectively.

What a whetstone is

A whetstone is a flat sharpening stone used to grind and hone a knife's edge by moving the blade across its surface. It is a classic sharpening tool valued for the control and quality it offers. Understanding what a whetstone is, and how it sharpens by abrading the edge, is the starting point for learning to use one effectively and confidently.

Understanding grit

Grit refers to how coarse or fine a whetstone's surface is. Coarser grits remove more material and are used for repairing or establishing an edge, while finer grits refine and polish it. Understanding grit is essential, as it tells you what each stone is for. Grasping how grit works helps you choose and use the right stone for each stage of sharpening.

Coarse, medium, and fine stones

Whetstones come in a range of grits, broadly coarse, medium, and fine. Coarse stones do heavy work, medium stones sharpen, and fine stones refine the edge. Using them in progression produces the best results. Understanding the roles of different grit levels helps you sharpen effectively, moving from coarser to finer stones to build and then perfect a keen edge.

Types of whetstones

Whetstones come in different types, such as those used with water or oil, each with characteristics and care requirements. Choosing a type that suits your preferences and following its care instructions matters. Understanding the types of whetstones helps you select one you can maintain and use properly, ensuring good results and a long life for your sharpening stone.

How to use a whetstone

Using a whetstone involves preparing it as required, then moving the blade across it at a consistent angle, working both sides of the edge. Following the correct technique with patience produces a sharp edge. Understanding how to use a whetstone, especially maintaining the angle and working methodically, is the key skill that turns the tool into sharp, well-honed knives.

Caring for your whetstone

Proper care keeps a whetstone effective, including cleaning it and keeping its surface flat, since stones can wear unevenly over time. Following the care instructions for your type of stone preserves its performance. Understanding the importance of caring for your whetstone ensures it continues to sharpen well, protecting your investment and your ability to keep your knives keen.

Frequently asked questions

What is a whetstone?

A whetstone is a flat sharpening stone used to grind and hone a knife's edge by moving the blade across its surface, valued for control and quality.

What does grit mean on a whetstone?

Grit refers to how coarse or fine the stone is; coarse grits remove more material to establish an edge, while fine grits refine and polish it.

How do I use a whetstone?

Prepare it as required, then move the blade across it at a consistent angle, working both sides methodically and progressing from coarser to finer grits.

How do I care for a whetstone?

Clean it and keep its surface flat, since stones wear unevenly, and follow the specific care instructions for your type of stone to preserve performance.

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Stainless Steel

The most common kitchen steel. It resists rust and stains, is easy to maintain, and re-sharpens readily. It may not hold an edge quite as long as high-carbon, but for most home cooks it's the practical, low-fuss choice.

High-Carbon Steel

Takes a wickedly sharp edge and holds it longer, beloved by chefs and enthusiasts. The catch: it can rust or stain if not dried promptly, so it needs a little more care. Many "high-carbon stainless" steels aim for the best of both.

Damascus Steel

Those beautiful wavy patterns are layers of steel folded together. Damascus is mostly about looks and craftsmanship — the performance comes from the core steel underneath, so don't pay for the pattern alone.

What Should You Buy?

The best steel is the one you'll actually maintain. A well-cared-for stainless beats a neglected premium blade every time.

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