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About this tool
Compare cooking cost on an induction hob against an LPG cylinder per month, with the break-even electricity tariff.
This calculator compares an induction hob and an LPG cylinder on the only basis that is fair — the cost of one kilowatt-hour of heat that actually reaches the pot. LPG carries about 12.64 kWh of energy per kilogram (45.5 MJ/kg net), of which a domestic open burner delivers roughly 68% under IS 4246, while an induction coil delivers about 85% of every unit it draws. It works out both bills from your own gas consumption, and gives the electricity tariff at which induction overtakes gas.
Open Induction vs LPG Cost Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Comparing ₹ per kg against ₹ per unit is meaningless; comparing ₹ per useful kWh is the number that decides it.
You get the exact electricity rate at which induction starts to win, so you can check it against your bill's top slab.
How long a cylinder lasts your household sets the cooking energy, so the answer is not built on a national average.
It depends almost entirely on your electricity slab. With a 14.2 kg cylinder at ₹900, LPG costs about ₹7.4 per useful kWh, so induction is cheaper only below roughly ₹6.3 a unit; at ₹8 a unit induction costs about ₹9.4 per useful kWh and gas wins. Households on a low first slab or with rooftop solar usually come out ahead on induction.
Roughly 140-150 units for a household that currently finishes a 14.2 kg cylinder every 30 days, because that cylinder delivers about 122 kWh of useful cooking heat and an induction hob needs about 85% efficiency worth of input to match it. A household that stretches a cylinder to 45 days would use closer to 95 units.
A 14.2 kg domestic cylinder holds about 180 kWh of chemical energy, using LPG's net calorific value of 45.5 MJ per kg. After the burner's 68% efficiency, roughly 122 kWh of that reaches your food; the rest escapes around the vessel as hot air.
Yes, per unit of heat delivered — an induction coil puts about 85% of its input into the pan base against about 68% for an open flame, because there is no hot exhaust rising past the vessel. That efficiency advantage is real, but whether it saves money depends on the price of a unit of electricity against the price of a kilogram of LPG.
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