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Petty Knives versus Utility Knives: What’s the Difference?

By Miye Bromberg Published

Petty knives and utility knives occupy the same essential niche within the knife world: They’re both midsize knives that are used for a wide range of kitchen prep tasks. So what’s the difference between the two types?

Historically, petty and utility knives varied significantly in origin, shape, and use. As Josh Donald, owner of Bernal Cutlery in San Francisco and author of Sharp (2018), a guide to knives, sharpening, and cutting techniques, explains, the utility knife, sometimes called an “office knife,” originated in Europe. In its earliest incarnations, it was used to clean and process wild game, and it resembled something between a paring knife and a boning knife, with a narrow blade that was made from softer, thicker metals and curved slightly from heel to tip. For Western chefs, the utility knife was considered the perfect companion knife to a chef’s knife. Together, as Donald puts it, the two knives formed the ultimate “power couple” of both professional and home kitchens in Europe.

The petty knife is essentially the Japanese version of the utility knife. As Donald explains in his book, the petty knife first arose during the Meiji era (late 19th century), when Western cuisine and cutlery were introduced to Japan. While the Japanese already had their own existing knife styles, they developed the gyuto (Japanese-style chef’s knife) and petty knife in response to the chef’s knife and utility knife they saw in Western-led kitchens. (The word “petty,” according to Donald, is likely derived from the French word “petit,” meaning “little,” a nod to the fact that these knives were considerably smaller than the average chef’s knife.) Following Japanese conventions, the petty knife had a blade that was thinner and harder than the Western knives; the blade itself had a more “triangular” geometry, with a straight, not curved, edge that enabled the sort of up-and-down cutting many Japanese cooks prefer. And the blades themselves were often hand-finished to ensure the keenest edge.

Historically, the blades on utility knives were narrow and relatively long; those on petty knives were and remain more triangular in shape.

Today, however, distinctions between the two types of knives have become somewhat blurred, at least if the models we tested are any indication. Petty knives have changed very little. They’re still the exclusive province of Japanese knife manufacturers; if the model has “petty knife” in the name, it’s almost certainly Japanese. And they’re still made from thin, very hard steels (the models in our lineup had Rockwell ratings—a standard for measuring metal hardness—from 58 to 64 HRC) forming straight-edged, triangular blades. 

These days, both petty knives and utility knives are thin and sharp enough to excel at fine, precise slicing.

It gets more complicated with utility knives. You can find utility knives made by European, American, and Japanese companies. Utility knives made by European and American companies still bear some resemblance to the traditional models. The Western utility knives in our lineup were made from softer metals (from 55 to 58 HRC), and three of the four had curved edges. One of the Western utility knives looks more like the earlier, traditional models; its blade is narrow from tip to heel. (We actually didn’t like this model very much, as we no longer use these knives to perform the kinds of tasks for which they were originally intended.) But the others look more like mini chef’s knives with deeper bellies. And all the Western utility knives have gotten thinner and more agile, with smaller edge angles than before—characteristics that actually make them more similar to the Japanese knives that cooks have increasingly come to appreciate. They aren’t exactly the utility knives of yesteryear. 

The Japanese “utility” knives we tested complicate the picture further. One looks just like a traditional Western utility knife, long and narrow. The other is basically a petty knife, despite its name: straight edge; triangular geometry; thin, hard metal.

So are there meaningful differences between the two types of knives? Yes, though those differences have become far less clear-cut over the years. Our advice? Buy by function, not by name.

Equipment Review Petty and Utility Knives

With a blade that’s halfway between that of a chef’s knife and that of a paring knife, a petty knife or utility knife is the perfect blade for medium-size kitchen prep tasks. Which is best?

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JC
JOHN C.
16 days

Absolutely the best chicken ever, even the breast meat was moist! It's the only way I'll cook a whole chicken again. Simple, easy, quick, no mess - perfect every time. I've used both stainless steel and cast iron pans. great and easy technique for “roasted” chicken. I will say there were no pan juices, just fat in the skillet. Will add to the recipe rotation. Good for family and company dinners too. I've done this using a rimmed sheet pan instead of a skillet and put veggies and potatoes around the chicken for a one-pan meal. Broccoli gets nicely browned and yummy!

Absolutely the best chicken ever, even the breast meat was moist! It's the only way I'll cook a whole chicken again. Simple, easy, quick, no mess - perfect every time. I've used both stainless steel and cast iron pans. great and easy technique for “roasted” chicken. I will say there were no pan juices, just fat in the skillet. Will add to the recipe rotation. Good for family and company dinners too.

MD
MILES D.
JOHN C.
9 days

Amazed this recipe works out as well as it does. Would not have thought that the amount of time under the broiler would have produced a very juicy and favorable chicken with a very crispy crust. Used my 12" Lodge Cast Iron skillet (which can withstand 1000 degree temps to respond to those who wondered if it would work) and it turned out great. A "make again" as my family rates things. This is a great recipe, and I will definitely make it again. My butcher gladly butterflied the chicken for me, therefore I found it to be a fast and easy prep. I used my cast iron skillet- marvellous!

CM
CHARLES M.
11 days

John, wasn't it just amazing chicken? So much better than your typical oven baked chicken and on par if not better than gas or even charcoal grilled. It gets that smokey charcoal tasted and overnight koshering definitely helps, something I do when time permits. First-time I've pierced a whole chicken minus the times I make jerk chicken on the grill. Yup, the cast iron was not an issue.