Can You Sharpen Serrated Knives?
Yes, but it's more complex than sharpening straight-edged knives. You need a tapered round sharpening rod (ceramic or diamond) to sharpen each individual serration. Most home cooks never sharpen serrated knives—they stay sharp for years and are often replaced when dull rather than sharpened.
Key Takeaways
- Serrated knives cut differently than straight-edged knives.
- Bread knives are the most common serrated knife—most people never sharpen them.
- Some serrated knives have offset serrations that are especially difficult to sharpen by hand.
Explanation
Serrated knives cut differently than straight-edged knives. The pointed tips of each serration do most of the cutting work, while the scalloped recesses between them don't contact the food as much. This is why serrated edges stay functional longer—less of the blade wears down from use.
To sharpen, use a round rod that fits into the serrations (typically 1/8" to 1/4" diameter). Work on each serration individually, holding the rod at the same angle as the bevel (usually 13-17 degrees). Stroke away from you, working through all serrations. Only sharpen the beveled side, not the flat side.
Professional sharpening services can handle serrated knives, and some electric sharpeners have serrated blade slots. However, the cost of professional sharpening often approaches the cost of replacing an inexpensive serrated knife.
A quality serrated bread knife from brands like Victorinox or Mercer costs $25-40 and will last 3-5 years of regular home use before needing attention. Professional sharpening runs $10-20 per knife. For high-end serrated knives (Wusthof, Shun) costing $80-150, professional sharpening makes financial sense since the knife is worth maintaining.
When choosing a sharpening rod, ceramic rods work well for maintenance but diamond-coated rods remove metal faster for truly dull blades. The DMT tapered rod is widely recommended by knife professionals. Each serration takes 3-5 strokes, and a typical bread knife has 25-35 serrations, so expect the full process to take 10-15 minutes. Finish by running the flat side of the blade lightly over a fine-grit flat stone to remove the burr created during sharpening.
Things to Know
- Bread knives are the most common serrated knife—most people never sharpen them.
- Some serrated knives have offset serrations that are especially difficult to sharpen by hand.
- Ceramic and high-end steel serrated knives can be worth professional sharpening.
- A dull serrated knife tears rather than cuts cleanly—that's when it needs attention.
- Never use a pull-through sharpener designed for straight edges on a serrated blade—it will destroy the serrations.