Sharpening Serrated Knives
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Serrated knives are the exception to almost every sharpening rule. Their scalloped edge is shaped differently, they dull differently, and most makers don't expect you to sharpen them the same way as a straight edge.
Why serrated knives stay useful longer
A common explanation: on a serrated edge, the points do most of the early work. They carry the load while the scalloped gullets between them stay protected, so a bread knife keeps biting into crust long after a straight edge would feel dull. That's one reason serrated knives often need sharpening less frequently than straight edges.
What makers recommend
Victorinox is direct: larger wavy blades like bread knives should be professionally sharpened, and for most people it recommends a professional service for all wavy blades. It does say an experienced user can touch up small wavy edges with its handheld tool.
That's sensible advice for most households. A professional service has the right equipment and won't flatten the serrations.
Your options
| Option | Best for | Notes |
|---|---|---|
| Professional sharpening service | Most people; bread knives | Victorinox's recommendation for most wavy blades |
| Tapered ceramic or diamond rod | Careful DIYers | Sharpens one scallop at a time; slow |
| Sharpener with a serrated slot | Quick touch-ups | Only if the maker says it's designed for serrations |
| Replace the knife | Inexpensive serrated knives | Sometimes the practical choice |
Tapered serrated rods → Amazon · Sharpeners with serrated slots → Amazon
If you choose to DIY with a tapered rod
This is the general method for touching up serrations with a tapered rod. Check your knife and rod makers' instructions first, and go slowly.
- Find the beveled side. Most serrated kitchen knives are ground on one side only. Look for the side where the scallops are visibly angled.
- Match the rod to the scallop. Slide the tapered rod into a scallop until it fills the curve.
- Match the bevel angle. Hold the rod at the same angle as the existing bevel.
- Stroke lightly outward toward the edge, a few times per scallop. Let the rod do the work.
- Move scallop by scallop along the blade. It takes time.
- Remove the burr. Lightly pass the flat back side of the blade across a fine stone or rod, keeping it nearly flat, to remove the small burr that forms.
- Test on a crusty loaf or tomato.
Don't grind the flat back side at an angle, and don't run a serrated knife through a straight-edge slot.
Honing serrated knives
Honing does much less for serrated edges than for straight ones, because the scallops don't bend the same way. Most of your effort should go to the occasional proper sharpening, or to sending the knife to a pro.
When to replace instead
If a serrated knife was inexpensive, has missing or chipped points, or a bent blade, replacing it may make more sense than paying for sharpening. If you're buying a new one, see our knife gift guide for what to look for. Bread knives → Amazon
Safety
Serrated knives grab. Keep your fingers well clear when working the rod into scallops, use a stable surface, and never test by touch.
For straight-edge knives, follow our main sharpening guide.
FAQ
Can you sharpen a serrated bread knife at home?
It's possible with a tapered rod, but it's slow and fiddly. Victorinox recommends professional sharpening for larger wavy blades like bread knives for most people.
Can I put a serrated knife through a regular pull-through sharpener?
Only if the sharpener's instructions say it's designed for serrated blades. Standard slots can flatten the scallops.
How do I know my bread knife is dull?
It tears soft bread or skids on crusty loaves or tomato skins instead of biting in.
Related guides
- How to Sharpen a Kitchen Knife (Whetstone, Pull-Through, and Steel)
- Best Knife Sharpener for Beginners: A Decision Guide
- Gift-Worthy Kitchen Knives Under $100: How to Choose