I live in Phoenix AZ. Which will be more expensive in the long run, an Induction or propane gas cooktop?
Some approximate figures
Energy efficiency while cooking
- Induction 90%
- Electric resistive 55%
- Gas 50%
Energy efficiency while heating up
- Induction 99%
- Electric resistive 0%
- Gas 0%
Time, total energy used, and cost to boil 2 l of Water
- Induction 2:20, 0.2 kWh, $0.034
- Electric resistive 5:00, 0.34 kWh, $0.058
- Gas 4:00, 0.37 kWh, $0.016
Gas burner is clean and correctly adjusted
Costs are estimates based on USA high prices as of 2013
In many other countries gas will be much more expensive
Bottled gas will be nearly twice the gas price from town supply gas
TDF gave a fantastic answer as far as price for the usage of the product, but you also have to factor in a few other things. While the induction ovens are by far the most effective, you also have to consider that only certain pans will work on an induction surface. You also can't have pans that have a textured bottom as they will scratch the surface. On top of those problems with induction tops, you also have to use special cleaner on them instead of a little soap and water, and they get dirty incredibly easy.
According to the report below, factoring in the cost diference of electricity to gas, the average induction oven would take 23 years to pay off the difference in energy saving (at current rates of course) That said, I doubt the stove top would last that long as they are prone to chipping and such.
To the benifits of the induction stove, for all the problems with them, they are still a favorite (if it can be afforded) of the food industry due to how incredibly fast they heat food up compared to the other options (due to its significantly higher efficiency.) They also do not have all the crevices that normal electric or gas stoves have.
Gas stoves on the other hand tend to last much longer, simply because of their construction, and are considered by many people to be the more enjoyable to cook with. When you shut them off, it is off (unlike electric stoves that continue to radiate heat) and are instantly to the heat you set them to. They do have to have a pilot light though and put off significantly more pollution (if you are one to care about such things)
Sorry to muddy up the water a bit, but you should definitely consider more than cost when looking at a stove. Also while looking only at the numbers, for the long long run a induction stove top is the cheaper option, it is unlikely to last the time required to get the extra investment back
There are also other parameters to consider. A gas cooker will use half of the energy (according to TFD's brilliant answer) to heat the room.
If you live in cold climate this is almost an added boon as gas is a fairly cheap way to heat your dwelling. If, on the other hand, you live in a warmer climate (I don't know much about Arizona, but I haven't heard it mentioned as a winter sport destination...) you may have to use a not insignificant amount of energy to get rid of this heat.