What Angle Should You Sharpen a Knife?

01 What angle to sharpen a kitchen knife?

Sharpen a kitchen knife at about 15 degrees per side — 30 degrees inclusive. Thin Japanese-influenced blades (santoku, gyuto, the Damascus cores on our kitchen shelf) are ground that way from the factory, and restoring that geometry is how they keep their glide.

Western chef knives often leave the factory closer to 18–20 degrees per side. If the knife is thick behind the edge and built to rock through dense ingredients, honour that geometry rather than chasing a Japanese number on a German blade. The edge should match the grind behind it.

02 Pocket knives and outdoor blades

Most folding EDC knives are happiest around 18–20 degrees per side: acute enough to slice packing tape and apple skin, stout enough to survive a staple in the cardboard. Hard powder steels at 61–63 HRC can hold 17–18 if you are careful; tougher steels at 56–59 HRC would rather sit at 20–22 and not chip.

Outdoor knives that baton, carve, and meet knots want the stronger end — 20–22 degrees, or a convex edge that behaves like one. A Scandi grind is the exception: you lay the entire bevel flat on the stone and the geometry sets the angle for you. That is why bushcrafters love it in the field.

03 How to find the angle already on the knife

Color the bevel with a marker. Make one light stroke on the stone. Where the marker vanished is where the stone is cutting. If the scratch is only at the shoulder, raise the spine. If it is only at the very edge, lower it. When the marker disappears evenly across the bevel, you have matched the existing angle — which is usually the right angle to keep.

Reprofiling to a new number is a longer session and a choice, not a default. Do it when the factory angle is wrong for your work, not because a chart said 15.

04 The microbevel trick

A microbevel is a second, slightly steeper apex — one or two degrees more obtuse — put on with a few light strokes at the end. It adds durability without giving up the thin geometry behind the edge. A 15-degree kitchen knife with a 17-degree microbevel still glides, and it survives the occasional bone that would chip a pure 15.

It is also how you recover a Saturday: if the primary bevel is close enough, a short microbevel session puts a working edge back without grinding the whole face. Use it as a finish, not as a substitute for ever raising a proper burr.

Sources & Further Reading

• ◆ Knife Steel Nerds — Maximizing Edge Retention: What CATRA Reveals about the Optimum Edge

Frequently Asked Questions

Questions from the Counter

Is 15 degrees or 20 degrees better for a knife?

Neither is universally better. Fifteen degrees per side suits thin kitchen knives that only meet food and wood boards. Around 20 degrees suits pocket and outdoor knives that meet cardboard, knots, and the occasional mistake. Match the angle to the work.

What is an inclusive sharpening angle?

Inclusive angle is both sides added together. Fifteen degrees per side is 30 degrees inclusive. Some jigs and charts quote the inclusive number, which is why a "30-degree" kitchen edge and a "15-degree per side" edge are the same geometry.

Can I sharpen every knife at the same angle?

You can, at about 20 degrees per side, and every knife will be serviceable. You will give up the glide of a thin kitchen blade and some of the toughness of a camp knife. One angle is a compromise; two or three, matched to the shelf, is craft.

From the Page to the Palm

Reading about steel is one thing. Holding it is the other.

Every claim in this guide is backed by a piece on the shelf — care tools, named and priced plainly in CAD.

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