Whetstone Grit Explained: What That Number Actually Means

You're looking at a shelf or an Amazon listing and see numbers like 1000, 3000, 6000 on whetstones and wonder what they actually mean. Almost everyone does at first. That number is the "grit", and it simply describes how fine the abrasive particles in the stone are.

The basic rule is simple: low number = coarse grit = more material removed, faster result, but rougher. High number = fine grit = little removal, slower, but noticeably smoother. Think of it like sandpaper: 80 grit chews through wood fast and leaves deep scratches, a 2000 grit just polishes.

What each grit range is actually good for

120–400, very coarse: Emergency territory only. A chipped edge, a completely botched angle, a blade that's genuinely wrecked. As a beginner, you'll rarely if ever need this.

800–1200, the workhorse: This is where the actual sharpening happens. A dull kitchen knife gets back on track at this grit. If you only own one stone, this is the range it should be.

2000–3000, fine: Refines what the 1000 left behind. Useful as a bridge, because jumping straight from 1000 to 6000 leaves a noticeable gap.

4000–6000, very fine: Polishes the edge. For most kitchen knives, this is already the sensible target, the leather strop takes it the rest of the way from there.

8000 and above, ultra-fine: For anyone who wants to squeeze the last bit out of their blade, close to razor sharpness. Not necessary for every knife, but a real difference on Japanese blades.

Waterstone or oilstone?

For kitchen knives, the answer is clear: waterstone. Oilstones leave residue that's hard to remove and belong more to pocket and hunting knives made from certain steels. Waterstones are easier to clean and give faster, cleaner results on kitchen blades. One important detail: oil soaks into a waterstone and is nearly impossible to get back out, while the reverse isn't a problem. So when in doubt, keep oil away from a waterstone.

What a beginner actually needs

The honest answer: less than most people think. For 90 percent of the knives in a home kitchen, two grits are plenty, a 1000 for the actual sharpening and a 3000 or 6000 for refining. Even simpler: a combination stone with both grits on one block, available for 20 to 40 euros.

It's only once you notice you're regularly dealing with very dull knives that a 400 grit is worth adding. And if you eventually want that razor edge feeling, that's when an 8000 comes into play.

One thing most people miss

Japanese waterstones aren't more expensive because the name sounds premium, they're more expensive because their bond is softer than synthetic stones. While sharpening, worn particles release constantly and expose fresh, sharp ones underneath, so the stone keeps "cutting" well over time. The trade-off: they're more fragile, soaking too long can crack them, and they need regular flattening to keep the surface true.

For a detailed breakdown of specific stones, from a cheap starter option to a full pro setup, check our product recommendations.