HUB 02 · Sharpening
Knife Sharpening Angle
One number decides how sharp and how durable your edge is. Here's the right one for your knife.
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The angle you sharpen at is a trade-off: lower (more acute) is sharper but more fragile; higher is more durable but less keen. Kitchen knives live in a narrow, well-understood band, and the main rule is simple — match the angle the maker ground, then decide whether to nudge it.
The right angle per steel type
Angle is measured per side(so a "15° edge" is 30° total). Harder steel can support a thinner edge without folding, which is why Japanese knives are ground more acute than German ones:
| Knife type | Typical hardness | Angle per side |
|---|---|---|
| German / Western (older grinds) | ~HRC 56–58 | ~20° |
| German / Western (modern, e.g. Wüsthof PEtec) | ~HRC 58 | ~14° |
| Japanese (VG-10, etc.) | ~HRC 60–61 | ~12–15° |
| Hard Japanese, thin edge | ~HRC 61+ | ~10–12° |
If you don't know your knife's angle, 15° per side is a safe default for most modern kitchen knives — keen enough to cut well, durable enough to hold up. The steel guide and geometry guide explain why hardness and angle are linked.
Lower vs higher: which way to nudge
- Go lower (more acute) if you want maximum sharpness, cut a lot of soft produce, and treat the knife carefully. The edge is keener but chips more easily.
- Go higher (more obtuse) if the knife takes abuse, or the steel is soft and rolls — a slightly wider edge lasts longer between sharpenings.
How to actually hold the angle
The number is useless if you can't hold it. Some references: 15° per side is roughly the height of two stacked coins under the spine of an 8-inch blade; many people find a physical angle guide or fixed-angle system helpful while learning. On a stone, consistency matters more than hitting the exact degree — a steady 17° beats a wobbling 15°. Full technique is in how to sharpen a chef's knife.
Questions
Frequently asked
What angle should I sharpen a kitchen knife at?
About 15° per side is a safe default for most modern kitchen knives. Use ~20° for older German knives, and 10–15° for hard Japanese blades. Match the knife's existing angle where you can.
Is a lower sharpening angle better?
Lower angles are sharper but more fragile — great for careful cutting of soft food, risky if the knife takes abuse. Higher angles are more durable but less keen. Match the angle to how you use the knife.
What angle are German vs Japanese knives?
German knives are traditionally ~20° per side (modern ones like Wüsthof are now ~14°); Japanese knives are ~10–15°. The harder Japanese steel supports the thinner edge without folding.
Keep reading
Related
Receipts
Sources
- Sharpening Supplies — Detailed Discussion on Knife Sharpening Angles
- Understanding blade angles: Western vs Japanese knives
We do not run a test kitchen, and we do not pretend to. Specs are the manufacturer's published figures, attributed as such; where we could not verify something, we say so on the page rather than quietly leaving it out. Read our full method.