The Ulu Knife: History, Uses, and How to Choose One

An ulu knife is a fan-shaped, all-purpose knife developed by the Inuit, Yupik, and Aleut peoples of the Arctic. Its half-moon blade sits directly below the handle, so cutting force travels straight down over the edge. Used for thousands of years for skinning, filleting, and food preparation, it remains a working tool today.

What Is an Ulu?

The word ulu is often translated as “woman’s knife,” because in traditional Inuit society it was the primary tool of women’s work: processing the animals the hunters brought home, preparing food, and making clothing. The men’s counterpart was a straight-bladed hunting knife. The ulu itself is ancient. Archaeologists have found examples dating back thousands of years across the Arctic, from Alaska through northern Canada to Greenland.

Early ulus were not made of steel. The blade was ground from slate, and the handle was carved from caribou antler, walrus ivory, musk ox horn, bone, or wood. When trade brought iron and steel north, makers adapted quickly. Old saw blades became prized ulu stock because the steel was already thin, flat, and tough.

What has never changed is the shape. The blade is a broad arc, roughly a fan or half-moon, and the handle mounts directly above the edge, either on a short central stem or across the full spine. That single design decision is what makes the ulu behave so differently from every straight knife in your kitchen.

As bladesmiths hand-forging knives since 1993, we find the ulu genuinely humbling. It is one of the oldest knife patterns still in daily use, and it solves a leverage problem modern kitchen knives still wrestle with.

How the Design Works

Hold a chef knife and your hand sits behind the edge, connected through a handle that runs parallel to the blade. Every bit of cutting pressure travels along that lever before it reaches the food. Hold an ulu and your fist is stacked directly over the cutting edge. There is no lever at all. Your arm’s weight drops straight into the cut.

That geometry does two things. First, it multiplies effective force: gristle, frozen fish, and thick hide that would require sawing with a straight blade often part under a single firm rock of an ulu. Second, it improves control, because the pivot of the rocking motion sits centered above the blade, so the edge goes exactly where you steer it.

The rocking cut is the ulu’s native stroke. You press down and roll the curved edge from one end to the other, walk the blade sideways, and repeat. The deep belly means some portion of the edge is always in contact with the board, which is why a practiced ulu user can mince a pile of herbs about as fast as anyone with a chef knife.

From a maker’s standpoint, the challenge in building a good ulu is grinding a clean, even bevel along a tight continuous curve and getting the handle placement right. If the handle sits even slightly off the centerline of the arc, the knife wants to tip in the cut and the user feels it immediately.

Traditional Uses in the Arctic

The ulu earned its keep as a processing tool in one of the harshest environments on earth. Its traditional jobs included:

• Skinning seals and caribou. The curved edge follows the contour of the carcass, and the overhead grip lets the worker separate hide from fat with short, controlled strokes. This is the same logic behind the deep belly on a modern skinning knife: more edge in contact with the hide per stroke.
• Filleting and cutting fish. Salmon, char, and whitefish were split, filleted, and sliced for drying with the ulu.
• Scraping hides. A duller ulu, or the same blade used at a low angle, scraped fat and tissue from skins being prepared for clothing, boots, and boat coverings.
• Cutting food and hair. The ulu handled everyday cutting around camp, including trimming hair.
• Shaping snow blocks. Some accounts describe ulus being used to trim blocks of snow when building igloos, though larger snow knives were the dedicated tool for that job.

An ulu was a deeply personal tool, made for its owner, often by a family member, sized to her hand, and passed down. Arctic tradition held that an ulu carried something of its owner’s knowledge with it, a sentiment any lifelong knifemaker can appreciate.

The Ulu in Alaska Today

Visit Anchorage and you will see ulus everywhere. The knife has become an emblem of Alaska, produced by local factories and sold in nearly every gift shop, frequently paired with a bowl-shaped chopping board designed for the rocking cut. For decades it has been one of the classic souvenirs of an Alaskan trip.

But the ulu is not just a souvenir. Across Alaska and northern Canada it remains a genuine working tool. Subsistence hunters and fishers still process seals, caribou, moose, and salmon with ulus, many of them handmade from saw-blade steel exactly the way their grandparents’ knives were made. Inuit, Yupik, and Aleut makers continue to produce them, and buying from Indigenous artisans is a direct way to support the living tradition rather than just the image of it.

Using an Ulu in a Modern Kitchen

If you own an ulu, use it. The knife is remarkably practical:

• Herbs and garlic. The rocking mince is faster and cleaner than dragging a straight edge back and forth. Pile the herbs, rock the blade through, gather, repeat.
• Vegetables. Onions, peppers, celery, and mushrooms chop quickly under a rolling edge. The ulu will not replace the push-cut precision of a chef knife for fine julienne, but for rough and medium chopping it is quick and comfortable.
• Pizza. A sharp ulu rocks through a pizza in single strokes, cleaner than most wheel cutters.
• Jerky and dense slicing. Downward force directly over the edge makes short work of jerky, cured sausage, and semi-frozen meat sliced thin for the dehydrator.
• Cheese and chocolate. Hard blocks that squirm away from a straight blade sit still under a straight-down rocking cut.

Pair the knife with a bowl-shaped cutting board if you can. The concave surface matches the blade’s arc, keeps food centered under the edge, and stops chopped herbs from scattering. A flat board works fine too.

How Modern Ulus Are Made

Most production ulus today carry a stainless steel blade, often stamped from sheet stock, with a hardwood handle riveted or epoxied to a short tang or saddle. That construction keeps prices low and works acceptably for light kitchen duty.

Hand-forged ulus are a different animal. Working in high-carbon steel or forge-welded Damascus, a smith can put a distal taper and a properly heat-treated edge on the blade, so it takes a keener edge and holds it far longer than stamped stock. Pattern-welded steel also turns the broad fan of an ulu into a canvas; few knife shapes show off the layered figure of Damascus steel better than that wide, unbroken arc. Handles on handmade pieces run to stabilized hardwoods, bone, antler, and horn, shaped to lock into a closed fist.

Choosing and Buying an Ulu

A few things to look for:

• Blade size. Most ulus run 4 to 6 inches across the arc. Around 5 inches is the versatile middle ground for kitchen work. Smaller blades suit detail tasks and smaller hands; larger ones chop faster but need more clearance.
• Handle fit. The handle should fill your closed hand without hot spots, with enough knuckle clearance that you can rock the blade fully without rapping the board. If you can hold one before buying, do.
• Steel. Stainless is low-maintenance. High-carbon and Damascus take a sharper edge and resharpen more easily, at the cost of needing to be kept dry and oiled.
• Construction. If you plan to use the knife rather than hang it on a wall, skip stamped souvenir-grade pieces with thin, soft blades and flimsy handle joints. A working ulu should feel rigid, with no flex at the handle junction.

Unsure about a term like distal taper or full tang while you shop? Our knife glossary covers the vocabulary. And if you plan to carry an ulu to a campsite or fishing spot rather than keep it in the kitchen, the usual state carry rules apply just as they do to any fixed blade; our overview of knife laws in America explains how those rules generally work.

Care and Sharpening

Sharpening a curved edge intimidates people, but the technique is simple: instead of pushing the whole edge along the stone at once, sweep the blade through an arc so each section of the curve passes over the stone at a consistent angle. Work from one tip of the fan to the other with light strokes, matching the factory bevel. A few passes per side on a medium stone, finished on a fine grit or a strop, restores a working edge.

For carbon steel and Damascus blades, wash and dry the knife immediately after use and wipe the blade with a light coat of food-safe oil before storing it. Never leave it wet, and never put it in a dishwasher. Wooden handles appreciate an occasional rub of mineral oil or wax. Our full knife care guide walks through rust prevention and long-term storage in detail.

The ulu has fed families above the Arctic Circle for thousands of years, and it will chop your dinner tonight with the same quiet efficiency. Few tools carry that much history in such a simple curve of steel.