People see a round piece of metal with a handle and assume one press is as good as another. If you already own a burger press, or a bacon press, it is reasonable to ask whether it will do the same job on a piece of fish. Mostly it won't, and in some cases it will make the fish worse. The two tools look alike but are built to do opposite things.
A burger press compresses. A fish press holds.
A burger press exists to push. You put a ball of mince on the plate and drive the press down to flatten it into a patty, or you lean on a smash burger to force the meat into the pan and build crust. The whole design assumes force — a flat plate, a handle you can lean your weight on, sometimes a ridged face to shape the meat.
Fish can't take that. A fillet is made of short, delicate muscle fibres held together by thin sheets of connective tissue. Press down hard on it and the fibres split, moisture is squeezed out, and the flesh turns dense and dry before the skin has had a chance to crisp.
A fish press is not there to flatten anything. It is there to stop the fillet lifting. When skin hits a hot pan the collagen in it contracts, the fillet bows upward, and only the centre stays in contact with the metal. The edges go pale and soft while the middle overcooks. The press supplies just enough steady weight that the skin stays flat against the pan from edge to edge, and then it does nothing else. Read more on this in Why Fish Curls in the Pan — And How to Stop It.
Weight: the number that matters most
This is the practical difference. A burger press is usually light because your arm supplies the force. Cast iron bacon presses are heavier, and that is where people get into trouble — a heavy, narrow press concentrates all its weight on a small patch of fillet.
Josh Niland's Fish Weight weighs 1.6 kg and is 16 cm across. That combination was arrived at by cooking a lot of fish: enough weight to overcome the pull of contracting skin, spread across enough area that no single point on the fillet is under pressure. It sits, it doesn't squash. We go into the reasoning in How Heavy Should a Fish Press Be?
Shape and contact surface
A burger press is flat and often ridged, because ridges leave grill marks on meat. On fish, ridges mean the skin is pressed in stripes: crisp where the ridge touches, soft in between.
A fish press has a flat, smooth, polished base. The whole underside makes even contact, so the weight is shared evenly and the skin browns uniformly. The base of the Fish Weight is mirror-polished stainless steel for exactly this reason — and because it is solid stainless, it never sheds seasoning or rust onto the fish the way raw cast iron can.
Material and heat
Cast iron burger and bacon presses are often pre-heated on the stove so they sear from above. That is useful on a patty. On fish it cooks the flesh from the top down while you are trying to cook the skin from the bottom up, and you lose the thing a fish press is for: crisp skin over just-cooked, still-moist flesh.
The Fish Weight goes on at room temperature. It takes a little heat from the pan over the cook, which is fine, but it isn't a top-side griddle. Its job is contact, not cooking.
Can you use a burger press on fish in a pinch?
If it is all you have: use a light one, with a smooth face, and rest it on the fillet rather than leaning on it. Put it on straight after the fish goes in skin-side down, when the skin is trying hardest to curl, and take it off after a minute or two once the fillet has settled flat. Don't preheat it. Expect uneven results on anything thicker than a small fillet.
If you cook fish more than occasionally, a dedicated press is worth it, because the weight and footprint have been worked out for you.
Can you use a fish press on a burger?
Yes — as a holding weight for bacon, or to keep a thin steak or chicken thigh flat so it browns evenly. It is not heavy enough to smash a burger, and it isn't meant to be.
The short version
| Burger press | Fish press | |
|---|---|---|
| Purpose | Compress and shape meat | Hold a fillet flat against the pan |
| Force | Your arm | Its own weight only |
| Face | Often ridged, sometimes pre-heated | Flat, smooth, polished, room temperature |
| Weight / size | Varies; often light, or heavy and narrow | 1.6 kg over 16 cm, so weight is spread |
| On fish | Squeezes out moisture, uneven browning | Crisp skin edge to edge, flesh stays moist |
Same silhouette, opposite intent. One is built to push; the other is built to wait.
Shop the Fish Weight · When to use a fish press — and when not to
The tool in this article
Josh Niland’s Fish Weight is the press used at Saint Peter: 1.6 kg of polished stainless steel, 16 cm across, made to hold a fillet flat without crushing it.