The most-asked question in kitchen sharpening, and the most-mangled answer. The right angle for your kitchen knife depends on what kind of knife it is, what hardness it’s heat-treated to, and what you actually cut with it. Here’s the working framework — with specific numbers — and how to find the angle if you don’t know it.
This is one of the deeper-dive pieces under our Edge Geometry pillar.
The quick answer
- Western kitchen knives (Wüsthof, Henckels, generic stainless): 17–20° per side.
- “Hybrid” knives (Shun, Miyabi, MAC, Western-shape but harder steel): 15–17° per side.
- Japanese kitchen knives (gyuto, santoku, nakiri at HRC 61+): 12–15° per side.
- Single-bevel Japanese knives (yanagiba, deba, usuba): 10–12° on the bevel side, flat on the back.
- Boning and fillet knives: 15–17° per side, slightly steeper than your gyuto.
- Cleavers (Western chopping cleaver, not Chinese vegetable cleaver): 22–25° per side.
“Per side” matters: a 15° per-side edge is a 30° included angle. American and most knife-maker conventions are per side. Some European and engineering sources use the included angle. We always specify.
Why getting the angle right matters
The wrong angle has predictable failure modes:
- Too steep (the angle is too high a number — 22° on a Japanese knife, say): The edge feels dull even when freshly sharpened. The blade wedges in dense vegetables. The shoulder of the bevel hits the food before the apex does. Cuts feel like work.
- Too shallow (the angle is too low — 12° on a soft Western knife): The apex rolls almost immediately. Within a few cuts the edge feels dull, but honing brings it right back. The steel can’t support the geometry.
- Inconsistent angle along the blade: The knife cuts well at the heel and poorly at the tip, or vice versa. Almost always a sign of inconsistent technique at the stone, not steel choice.