The ideal sharpening angle for most knives falls between 15° and 20° per side. The specific angle you choose depends on the type of knife and what you use it for.
To determine if your knife is sharpened to 15∘15 raised to the composed with power15∘ or 20∘20 raised to the composed with power20∘, you can look at its origin or use the visual Sharpie test.
The most common knife sharpening mistakes involve using inconsistent angles, applying too much pressure, and failing to raise a burr. To get a razor-sharp, lasting edge, avoid these frequent errors:
To sharpen a Wusthof knife, use a whetstone (a 1000/3000 grit combination is ideal) to reset the bevel at a 15∘15 raised to the composed with power15∘ to 20∘20 raised to the composed with power20∘ angle. Alternatively, use an electric or rolling sharpener set specifically to the manufacturer's angle to avoid damaging the blade.
Choose 20 degrees for general utility and slicing performance, or 25 degrees for heavy-duty, rugged tasks. The best angle depends entirely on what the knife is used for and the type of steel it is made of.
You should not use WD-40 to sharpen a knife. While it can act as an adequate lubricant for oil stones, it will not actually sharpen the steel and may ruin your stones.
Butchers typically sharpen their knives at an angle between 15° and 20° per side (resulting in a total angle of 30° to 40° for the cutting edge).
The fastest way to dull a knife is by cutting on ultra-hard surfaces like glass, granite, ceramic, or directly on dinner plates. Because these materials are harder than the knife steel, repeated impacts cause microscopic edge rolling, chipping, and catastrophic dulling in just a few uses.
You can do both. Which motion you use depends on the sharpening tool you are working with:
Gordon Ramsay uses a honing steel (also called a honing rod or sharpening steel) to maintain and straighten his blades before every use. For heavier maintenance, professional chefs also rely on whetstones or modern rolling sharpeners (like the Tumbler Rolling Sharpener) to re-profile the edge when it goes dull.
Yes, pull-through sharpeners will eventually ruin good knives. While they are convenient for a quick fix on cheap, everyday blades, their aggressive carbide wheels shave off excessive metal, ruin the blade's original shape, and create a jagged edge rather than a truly polished one.
The "holy trinity of knives" refers to either the foundational trio of folding pocket knives that defined the high-end knife industry, or the three essential blades every kitchen needs.
The ultimate trick to knife sharpening isn't a magical tool—it’s maintaining a consistent angle (usually 15∘15 raised to the composed with power15∘ to 20∘20 raised to the composed with power20∘) on the stone and building a "burr" before polishing.
Whether you sharpen both sides of a knife depends entirely on the type of knife you have.
The blade- edge angle for all Zwilling J.A. Henckels cutlery, with the exception of santoku knives, is 15 degrees on each side (30 degrees total).
We tend to grind to 13-16 degrees per side. If you match the existing edge angle and hold the knife against the stone to cut evenly across the edge grind, you will produce an edge with a similar angle.
Japanese artisans and home cooks traditionally use whetstones (called toishi in Japanese) to sharpen their knives. These water stones grind away metal to create a precise, razor-sharp edge.
Navy SEALs are not issued a single, universal knife; rather, standard-issue models like the Ontario MK 3 Mod 0 and Cold Steel SRK are designated for trainees and specific operations. However, on actual deployments, operators carry a mix of customized gear, frequently opting for versatile folding knives or fixed blades from premium brands like Benchmade, SOG, and Strider.
The 3-finger test (popularized by bladesmith Murray Carter) is an advanced technique used to gauge a knife's sharpness and edge aggression. By gently resting your three fingers on the cutting edge and attempting to slide them along, you can feel how "grabby" the edge is and assess its condition.
There is no set number of strokes to sharpen a knife. It depends entirely on how dull the blade is and the grit of your stone.
1000 grit is much finer than 400 grit. In the world of abrasives (like sandpaper, sharpening stones, or polishing compounds), higher numbers indicate smaller, tightly packed abrasive particles that leave smoother finishes, while lower numbers mean larger, coarser particles that remove material quickly.
The "best" lubricant depends on how you use your knife. For general-purpose pocket knives, synthetic lubricants like Knife Pivot Lube (KPL) Original or Benchmade BlueLube are top-tier choices because they suspend grit and won't evaporate. For everyday carry (EDC) blades, dry lubricants like Sentry Tuf-Glide are excellent to prevent pocket lint from gumming up the pivot.
Yes, you should always wash a knife after sharpening. Sharpening actively removes steel from the blade, leaving behind microscopic metal shavings and stone grit. Washing prevents these particles from transferring into your food or causing the fresh edge to rust and corrode.
Butterfly knives (balisongs) are often restricted or illegal because of their rapid one-handed deployment, historical ties to gang violence, and media stigmatization. Many jurisdictions classify them alongside switchblades or gravity knives as dangerous, concealed weapons.