🔎 What Is an Induction Cooktop? (How It Actually Works)

Published 24 August 2026 · Updated 16 September 2026

Written & fact-checked by the Induction Cooktop Australia research team, using published manufacturer specifications and Australian retail pricing — see our editorial process.

If you've searched "what is an induction cooktop," here's the short answer: it's a cooktop that heats your cookware directly using a magnetic field, instead of heating an element or burning gas underneath a pan. It looks like a flat glass ceramic surface — similar to a radiant electric cooktop at a glance — but the way it generates heat is completely different, and that difference changes almost everything about how it cooks, how safe it is, and what it costs to run.

How induction actually works

Beneath the glass surface sits a coil of copper wire under each cooking zone. When you switch a zone on, an electronic inverter drives alternating current through that coil at a high frequency (typically in the tens of kilohertz), which creates a rapidly alternating magnetic field directly above the coil. This is the same basic physics — electromagnetic induction — behind wireless phone chargers and transformers, just applied at higher power.

When you place a ferromagnetic pan on top of an active zone, that alternating magnetic field induces small circulating electrical currents (called eddy currents) directly inside the base of the pan. The pan's own electrical resistance converts those currents into heat — so the pan itself becomes the heating element. The glass cooktop surface is basically just along for the ride: it doesn't generate heat, so it stays far cooler than a gas flame or a traditional radiant electric element, warming only from contact with the hot pan base.

Why that matters day-to-day

• Speed — because the pan heats directly rather than waiting for an element to heat up and radiate heat across an air gap, water typically comes to a rolling boil in roughly half the time of a ceramic electric cooktop at a comparable wattage.
• Precision — power adjusts almost instantly, similar to gas, with no lag waiting for a coil to heat or cool. Turn the dial down and the heat drops immediately, which matters for anything that can scorch quickly — melting chocolate, reducing a sauce, finishing a delicate fish fillet.
• Safety — the surface around your pan stays cool to the touch because it isn't the thing generating heat, and most zones auto-detect when a pan is lifted off and cut power within a second or two.
• Efficiency — less energy is wasted heating the surrounding air and glass, which is a large part of why induction typically costs less to run per meal than ceramic electric for the same cooking task.

The catch: magnetic cookware only

Because the technology relies on inducing current in a magnetic material, non-magnetic cookware — pure aluminium, copper, and most glass or ceramic cookware — won't heat at all, or will barely register. Cast iron and most stainless steel cookware work well, since both are ferromagnetic enough to couple efficiently with the field. See our cookware compatibility guide for the quick fridge-magnet test that tells you in seconds whether a pan will work.

Is it the same as "electric"?

Loosely, induction is a category of electric cooktop — it plugs into (or is hard-wired to) your home's electricity supply rather than gas. But it behaves very differently from the older ceramic/radiant electric cooktops still common in Australian rentals, which heat a coiled metal element that then radiates heat upward through the glass. See our full induction vs electric comparison for the detailed differences in speed, running cost and cleaning.

Common misconceptions

"Induction cooktops are dangerous because of the magnetic field." The field is designed to couple efficiently with a pan directly on the surface and drops off very quickly with distance — by the time it reaches a person standing at a normal cooking distance, exposure is well within international safety limits set by bodies like the International Commission on Non-Ionizing Radiation Protection. If you or a household member has a pacemaker or other implanted medical device, check with your device manufacturer or treating specialist, which is standard advice for any induction appliance.

"Induction cooktops can't sear or wok-cook properly." This was true of early, underpowered domestic models, but modern induction zones — especially boost/power-boost functions — can match or exceed gas wok burners for raw heat output, provided you're using a flat-base pan matched to the zone size. See our wok guide for specifics.

Should you switch?

For most Australian kitchens in 2026, yes — induction is faster, safer around kids, and cheaper to run per meal than both gas and ceramic electric, provided your cookware is compatible and your electrics can support it (see our installation guide). Browse popular induction cooktops on Amazon AU or take our quiz to find one that fits your kitchen.

Induction, radiant electric and gas compared

Our induction vs electric comparison covers the first two in detail.

Why the efficiency figure is real, not marketing

The efficiency gap comes from counting the steps where energy escapes. Gas loses the most: a flame heats the pan base but also spills heat up the sides and into the room, which is why a gas kitchen gets so much hotter to stand in. Radiant electric heats a coil, which heats the glass, which heats the pan — each transfer loses something, and the glass stays hot long after you switch off, so that stored energy is simply lost to the room.

Induction skips all of the intermediate steps. There is no element to heat, no glass to heat through, and no flame spilling around the pan. When you switch off, the only residual heat in the system is in the pan and the small patch of glass it warmed by contact.

There is a second, less obvious benefit for Australian households: because induction dumps far less waste heat into the kitchen, air conditioning works less hard during summer. In a small apartment cooking dinner in February, that is genuinely noticeable.

What using one is actually like

Three things surprise most people in the first week.

It is faster than you expect. Water boils in roughly half the time of a radiant cooktop, which means pans left unattended while you fetch something can reach temperature before you get back. Oil in particular gets to smoking point fast. Most people recalibrate within a few days, but it is a real adjustment.

Control feels like gas, not electric. Turn it down and the heat drops immediately, because there is no hot element acting as a buffer. Pots that used to boil over after you turned them down simply stop boiling.

There is some noise. A cooling fan runs under load and continues for a while after you switch off, and lightweight multi-ply pans can buzz audibly at high power as their layers vibrate in the field. Neither is a fault, and heavier flat-based pans reduce the buzz considerably.

What you need before you can use one

• Magnetic cookware. If a fridge magnet sticks firmly to the pan base, it works. Cast iron, carbon steel and most clad stainless pass; aluminium, copper, glass and ceramic do not. Our cookware guide covers the details.
• The right electrical supply, for a built-in — a dedicated circuit sized to the cooktop’s total connected load, installed by a licensed electrician. This is a legal requirement in every Australian state and territory.
• Nothing at all, for a portable unit. It plugs into a standard 10A power point, which is why portables suit renters and small kitchens.

The honest downsides

Three things are genuinely worse about induction than the alternatives, and they are worth knowing before you switch.

It does not work in a blackout. Induction is entirely electric and depends on an electronic inverter, so it stops in a power outage — unlike a gas cooktop, which can often be lit manually. If outages are common where you live, a portable butane stove is a sensible backup.

Cookware may need replacing. For most households this turns out to be a few pans rather than the whole collection, but if you own a quality aluminium or copper set, the replacement cost is real and belongs in your budget.

Repairs are more specialised. An induction cooktop fails at its inverter electronics rather than at a simple heating element, which makes the repair more expensive and the pool of technicians smaller. This is the main reason to weight Australian parts and service availability when choosing a brand — see our brand comparison.

Frequently asked questions

Does induction cooking use more electricity than a normal electric cooktop?

No — for the same amount of food cooked, induction typically uses less total electricity than radiant/ceramic electric, because more of the energy goes directly into the pan rather than being lost heating the surrounding glass and air. See our running costs guide for the detail.

Can I install an induction cooktop myself?

No. A built-in induction cooktop must be connected by a licensed electrician in every Australian state and territory — see our installation guide. Portable plug-in units don't require an electrician.

Is induction cooking healthier?

Induction doesn't produce a naked flame or combustion byproducts the way gas does, so it doesn't add nitrogen dioxide or other combustion gases to indoor air — a factor some households weigh alongside cost and speed when switching from gas.

Is an induction cooktop the same as a ceramic cooktop?

No, though they look almost identical. Both have a flat glass-ceramic surface, but a ceramic (radiant) cooktop heats a coil beneath the glass that glows and radiates heat upward, while induction generates a magnetic field that heats the pan directly and never glows. Ceramic works with any flat cookware; induction needs a magnetic base.

How can I tell if a cooktop is induction?

Put a magnetic pan and a non-magnetic one on an active zone. Induction will heat the magnetic pan and refuse the other entirely, and it never glows red beneath the glass. A radiant cooktop glows and heats both. On a cooktop that is switched off, look for the induction coil symbol on the glass or check the model number.

Do induction cooktops need a rangehood?

Yes. Induction removes combustion products, which is a genuine indoor air quality improvement over gas, but the food itself still produces steam, smoke and grease. Extraction is still needed — it is the fuel that changed, not the cooking.

Can induction cooktops be used with any pan if you buy an adapter?

Adapter discs exist — a magnetic plate that heats and passes warmth to the pan above — and they technically work. But they waste a lot of energy, heat slowly and throw away the instant responsiveness that makes induction worth having. They are a stopgap for one irreplaceable pan, not a strategy.

More on this topic: How induction cooking works · Induction running costs