Can You Sharpen Scissors With a Knife Sharpener? What Works and What Does Not

Why scissors are different from knives

A knife cuts with a thin wedge, so it needs a fine apex on both sides. Scissors cut by shearing: two blades pass each other, and the material is trapped and snapped between the two inside edges. Each blade has one bevel on the outside, ground at a steep angle so the edge is strong, and a flat inside face that runs against the other blade.

What makes scissors cut is that the two edges meet cleanly along their length with light tension at the pivot. If the inside face is rounded or the bevel is ground at a knife angle, the edge becomes thin and weak, folds over, and the blades start to chew instead of shear.

You can see this on any pair. Open the scissors and look at the outside of each blade near the edge: there is a narrow, steep bevel, often only a millimeter or two wide. Then run a fingernail gently along the inside face: it should feel flat and smooth right up to the edge. That flat face is what you protect when sharpening, and the narrow bevel is the only surface you grind.

What happens in a knife slot

In a V-shaped knife slot, both sides of the blade touch abrasive. On a scissor blade that means the flat inner face gets ground too, which is exactly what you want to avoid. The slot angle is also wrong: it tries to put a 15 to 20 degree bevel on a blade designed for a much steeper one.

In practice, a few pulls through a carbide knife slot can make cheap household scissors feel briefly sharper by roughing up the edge, but they dull again quickly and the inner face is damaged. On good fabric or kitchen shears, avoid it.

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Sharpeners with a scissor slot

Many pull-through sharpeners include a separate scissor slot. It holds a single abrasive, carbide or ceramic, at a steep angle, and you open the scissors and draw one blade at a time through it, from the pivot to the tip, with the bevel side against the abrasive. Three to five strokes per blade is typical.

These work well on ordinary household, kitchen and craft scissors. Check the instructions for left-handed scissors, since some slots only fit right-handed bevels, and for exclusions: pinking shears, serrated blades and convex-edged hair shears are commonly not allowed.

Manual sharpeners with scissor slots →

How to sharpen scissors on a whetstone

Take the scissors apart if they have a screw pivot; it makes the job easier, but it is not required. Wet a medium stone around 1000 grit, or start with a coarse stone around 400 if the blades are nicked. Lay the outer bevel of one blade flat on the stone so the existing bevel sits evenly on it; you will feel it settle. Stroke from the pivot end to the tip, keeping the bevel angle the same, until the bevel shows a fresh, even scratch pattern along its full length.

Do the second blade the same way. Then lay each inside face flat on the fine side of the stone and take one or two very light strokes only to remove the burr, keeping the face completely flat. Reassemble, open and close a few times, and test on fabric or paper.

The marker trick from knife sharpening helps here too. Color the bevel with a felt-tip pen, take two strokes, and check: if ink remains at the edge, raise the back of the blade slightly; if ink remains at the heel of the bevel, lower it. Once the ink comes off evenly across the whole bevel, you are at the right angle and can keep going with the same hold.

Two-sided stones that suit scissors →

Other tools that work

Small dedicated scissor sharpeners use a rod or carbide insert that follows the bevel, and some have adjustable angles to match kitchen, craft and fabric scissors. Diamond files are good for garden shears and pruners, which also have a single bevel. A flat diamond plate works the same way as a whetstone and needs no soaking.

The old trick of cutting through aluminum foil or fine sandpaper only polishes the edges slightly. It can freshen scissors that are a little dull, but it does not fix a rounded or nicked edge.

Sharpeners for pruners and shears →

Frequently asked questions

Can I use a pull-through knife sharpener on scissors? Only the scissor slot, if it has one. The knife slots grind both sides of the blade at a knife angle and damage the flat inner face of the scissor blade.

Can I sharpen scissors on a whetstone? Yes. Keep the outer bevel flat on the stone at its existing angle, stroke from pivot to tip, and only take one or two light flat strokes on the inside face to remove the burr.

Can you sharpen fabric scissors yourself? Yes, with a fine stone or a dedicated scissor sharpener that matches the angle. Expensive tailor's shears are often sent to a professional, since an uneven bevel is noticeable on fine fabric.

Why do my scissors still not cut after sharpening? Often the pivot is loose and the blades separate, so they fold the material instead of cutting it. Tighten the screw until the blades close smoothly with slight tension, and check that the tips meet.