Induction-compatible cookware is any pan with a ferromagnetic base that responds to a magnetic field, which you can test in 10 seconds with a refrigerator magnet. Hold the magnet flat against the bottom of the pan. A strong grip means the pan works on induction. No pull means it will not heat at all. Cast iron, carbon steel, and most clad stainless steel pass. Bare aluminum, copper, and glass fail unless the manufacturer bonded a magnetic disc into the base. The minimum base diameter for most induction cooktops is 4-5 inches.
One upfront note. This is written from an electric glass top, not induction, so it does not pretend to be lived experience on an induction burner. But the magnet test works the same in any kitchen, and a pile of owner reviews fills in the parts a magnet alone cannot. Running a magnet over a full cabinet of pans is revealing, and the result tends to surprise people.
Why Induction Is Picky About Pans#
A regular electric or gas burner heats a coil or a flame, and that heat soaks into whatever you put on top. Induction does not do that. An induction cooktop has a coil under the glass that throws out a magnetic field, and that field only turns into heat if the pan itself is magnetic. The base does the heating, so the glass underneath stays relatively cool.
The technical word is ferromagnetic, which for cookware just means the metal grabs a magnet. Iron and steel in the right form do. Aluminum, copper, and glass do not. If a magnet does not care about your pan, neither will the cooktop, and it will flash an error or sit there cold.
Three Ways to Tell If a Pan Is Induction Compatible#
There are three ways to check, in rough order of reliability.
The first is the magnet test, and it is the one to rely on. Any magnet works, even the weak one pinning a photo to your fridge. Do not just press it once at the edge, though. Drag it from the rim toward the center. A pan that grips hard the whole way across is fully compatible. A pan that grabs at the rim but goes dead in the middle has a magnetic ring bonded only around the edge, common on cheaper nonstick, and on induction that gives you a hot ring and a cold center. A soft, sliding grip is no better, since a weakly magnetic base heats slowly and unevenly. Treat an edge-only ring or a soft grab the same way. Retire that pan for induction, or if it is one you cannot part with, see the converter disc below.
The second is the induction symbol. Many makers stamp a small mark on the base or print it on the box, usually a zig-zag or a row of loops meant to suggest a coil. If it is there, the pan works. But plenty of good older pans never got the stamp, so a missing symbol tells you nothing. Treat the symbol as a bonus confirmation, not the real test.
The third is the size check, which people forget. Induction burners need a minimum base diameter of 4-5 inches to switch on, so a tiny but perfectly magnetic butter warmer can still throw a no-pan error. If a pan passes the magnet test but the cooktop will not fire, the diameter is the usual culprit.
Which Materials Work, and Which Do Not#
Once you know the magnet rule, the materials sort themselves out.
Cast iron is the easy one. It is almost entirely iron, so it grabs a magnet harder than anything else in the kitchen and works on every induction cooktop made. Enameled cast iron works too, since the iron body sits right under the enamel, and carbon steel works for the same reason, a thinner and lighter relative of cast iron. Cast iron can scratch a glass induction surface the same way it scratches a glass top, though, so lift it instead of sliding it. I went deep on that in my guide to the best cast iron skillet for a glass top stove, and the handling rules carry straight over. If you plan to use cast iron on induction regularly, the hot spot issue from coil size mismatch is worth understanding before you start cooking.
Stainless steel is where the confusion lives. It is an alloy, and whether it works comes down to the metal in the layer touching the cooktop. Clad pans built with a magnetic outer layer grab a magnet and cook great. But the high-nickel stainless in some single-ply pans is essentially non-magnetic, not because nickel blocks anything, but because that mix of metals leaves the steel in a form that does not respond to a magnet. Two stainless pans that look identical can behave completely differently, which is exactly why the magnet test earns its keep here.
Then there is the group that usually fails. Bare aluminum, all copper, and glass. None is magnetic on its own, so on most induction burners they barely react and the cooktop will not turn on. The wrinkle is that many modern aluminum and nonstick pans have a magnetic steel disc bonded into the base so they will work, and those pass the magnet test even though the body is aluminum. It is the old bare-aluminum pans and solid copper pieces, with nothing magnetic in the base, that get left behind. If copper tempts you on looks, it is worth reading why I decided copper cookware is a poor match for an electric or induction setup first.
What a Magnet Test Across a Whole Kitchen Finds#
It is worth running the magnet over an entire cabinet, expecting one or two pans to flunk.
Cast iron skillets like Lodge and Camp Chef grab the magnet so hard you have to peel it off. A de Buyer carbon steel pan, the lighter style many cooks reach for on weeknights, does the same, which tracks with the case for it holding heat and earning its place in is a carbon steel pan worth it. A flat-bottom Yosukata carbon steel wok grips just as hard. An enameled Dutch oven is the same story, instant grab right through the enamel. A clad stainless frying pan holds the magnet firmly thanks to its magnetic outer layer. Even an everyday nonstick pan with a bonded disc and the little coil symbol stamped on the base passes.
Often every single pan works, not one failure in the cabinet. If you have bought decent cookware in the last several years, most of it probably already works on induction. The pans that fail tend to be old bare-aluminum throwaways or copper pieces most people retired years ago. So before you replace a whole kitchen, spend ten seconds per pan with a magnet.
If Nothing You Own Passes#
A few people will come up empty. If that is you, do not start with a pricey induction set. The cheapest way onto induction is one pan that always works, either cast iron or carbon steel. A basic cast iron skillet costs less than most nonstick pans, passes the magnet test without question, and lasts decades. My cast iron skillet guide for beginners covers the ones worth buying. Add a magnetic stainless pan later and you have most of what a home cook needs.
When You Want to Save One Pan: The Converter Disc#
When everything in a cabinet passes, a converter disc is never needed. But maybe one solid pan of yours just did not make it past the magnet, and there is a workaround. (See the Wikipedia article on induction cooking for more detail.) An induction converter disc is a flat plate of magnetic steel that sits on the burner. The field heats the plate, and the plate heats your pan by ordinary contact.
Owner reviews tell the story here, not hands-on testing. A stainless 11-inch disc like this one sits around 3.5 stars across roughly 500 reviews. Owners consistently say the heavier stainless discs lie flat instead of warping, and 11 inches is wide enough for a real frying pan. That middling score is the honest part. The complaint behind it is consistent, you lose the two things people love about induction, the speed and the instant response, because the plate has to heat up and cool down on its own. Size the disc to your pan, not the burner, since one smaller than the base just recreates the cold-center problem. At $20-$30, a disc is a rescue for a single pan you cannot replace, not a way to keep a whole incompatible set.
Most Modern Cookware Already Works on Induction#
Induction compatibility looks complicated from the outside, but it really comes down to one habit. Keep a magnet in the kitchen drawer and drag it across the base before you assume anything. Cast iron and carbon steel always pass, most clad stainless passes, and aluminum, copper, and glass pass only if a magnetic disc was built in. The surprise nobody selling new cookware mentions is that a modern kitchen is mostly induction-ready already. Test first, buy last. And if you are shopping for new cookware specifically for an induction hob, understanding what induction ready actually means beyond the label will save you from overpaying for construction that barely works. The cookware material chooser also factors in stove type as part of its recommendation.
