The gas vs induction debate is one of the most heated (pun intended) topics in Australian kitchen renovations. For decades, gas was considered the gold standard for cooking, but induction technology has matured dramatically, and the evidence now strongly favours induction on almost every front — cost, performance, health, and safety. Here's the full comparison.
Running Cost Comparison
Cooking typically represents a small portion of household energy costs compared to hot water and heating, but the difference between gas and induction still adds up over time:
| Cooktop Type | Annual Running Cost | Energy Efficiency |
|---|---|---|
| Gas cooktop | $80–$120 | 35–40% |
| Electric ceramic cooktop | $70–$100 | 65–70% |
| Induction cooktop | $40–$60 | 84–90% |
Gas cooking is surprisingly inefficient — only 35–40% of the heat energy produced by the gas flame actually reaches your food. The rest heats your kitchen. Induction, by contrast, transfers 84–90% of its energy directly to the cookware through electromagnetic induction, wasting almost nothing.
Performance: Speed and Precision
Induction cooking has a significant performance advantage over gas in most areas:
Speed
Induction boils water approximately twice as fast as gas. A standard induction zone can boil 2 litres of water in about 4 minutes, compared to 8–9 minutes on a gas burner. This isn't just convenient — it means less energy consumed per cooking task.
Temperature control
Induction offers precise, instantaneous temperature control. Changes happen immediately because the heat is generated directly in the pan, not in a flame below it. Low-temperature tasks like melting chocolate or simmering sauces are easier and more consistent on induction than gas.
Responsiveness
When you turn an induction zone down or off, the cooking vessel responds instantly — just like gas. This is the key advantage induction has over traditional ceramic or electric coil cooktops, which retain heat and continue cooking even after being turned down.
Where gas still has an edge
- Wok cooking: High-powered gas wok burners (15–20MJ) can produce more intense, focused heat than standard induction zones. However, some premium induction cooktops now include dedicated wok zones with concave surfaces.
- Charring and flame work: Roasting capsicums or charring tortillas directly over a flame isn't possible on induction. A kitchen blowtorch or the oven grill serves as an easy workaround.
- Power outages: Gas cooktops work during blackouts. Induction does not. This is a minor consideration for most households.
Health: Indoor Air Quality
This is perhaps the most compelling reason to switch from gas to induction. Gas cooktops release combustion products directly into your kitchen, including:
- Nitrogen dioxide (NO₂): A respiratory irritant linked to childhood asthma. Studies have shown that homes with gas cooktops have NO₂ levels that frequently exceed outdoor air quality standards.
- Carbon monoxide (CO): Produced when gas doesn't burn completely. While levels from cooking are typically low, long cooking sessions in poorly ventilated kitchens can raise concentrations.
- Formaldehyde and ultrafine particles: Both are produced by gas combustion and contribute to poor indoor air quality.
A 2023 Australian study found that approximately 12% of childhood asthma cases in Australia are attributable to gas stove exposure — equivalent to the impact of second-hand cigarette smoke. Even with a rangehood, complete removal of combustion products is difficult unless the rangehood vents externally (many recirculate).
Cost to Switch from Gas to Induction
Switching from a gas cooktop to induction involves the cooktop itself plus some electrical work:
| Component | Cost Range |
|---|---|
| Induction cooktop (4-zone, 60cm) | $600–$1,200 |
| Induction cooktop (4-zone, 90cm or premium) | $1,200–$2,500 |
| New electrical circuit (32A dedicated) | $200–$500 |
| Gas point capping | $100–$200 |
| Total | $800–$2,000 |
Most kitchens need a new dedicated 32-amp electrical circuit for an induction cooktop, as existing power points won't provide sufficient power. A licensed electrician can usually run this from your switchboard in a couple of hours.
Cookware Compatibility
Induction cooktops require ferromagnetic cookware — materials that a magnet will stick to. This includes:
- Works on induction: Cast iron, stainless steel (most), carbon steel, enamelled cast iron (Le Creuset, Staub)
- Won't work on induction: Pure aluminium, copper, glass, some stainless steel (if non-magnetic)
A simple test: hold a fridge magnet to the bottom of your pan. If it sticks firmly, it'll work on induction. Most modern cookware sets are induction-compatible, and quality induction-ready sets start from around $100–$200.
The Verdict
Induction wins on running costs, cooking speed, temperature precision, safety (no open flame, cool-to-the-touch surface), and indoor air quality. Gas retains a small edge for intense wok cooking and flame-based techniques, but for the vast majority of home cooking, induction is simply better.
When you factor in the health benefits of eliminating indoor combustion and the financial benefit of eventually disconnecting gas entirely, the case for switching to induction is overwhelming. At $800–$2,000 for the switch, it's also one of the most affordable upgrades in the all-electric journey.