Gas Fuel and Stove Types

Butane vs Propane vs Isobutane

While all three fuel sources might seem to be similar, each have their own set of unique of characteristics that set them apart from one another. It's not a matter of which fuel is better, but which fuel is more appropriate for what occasion. A major difference between butane vs propane vs isobutane is the vapor pressure at a given temperature. Vapor pressure is the force at which the gas pushes against the cylinder walls.

Is Butane or Propane a Better Fit For You: The Pros and Cons

The first fact consumers need to know about butane is this: Often when we talk about butane and propane that is sold commercially, the actual product is in fact a mixture of the two. LPG, or liquefied petroleum gas, is a common mixture of the two substances. Even mixtures that are labeled as one or the other are often blends with 90% propane and 10% butane and other derivatives, or the other way around. This is why you should read labels carefully so that you know exactly which substance you’re getting and in what quantities.

Most devices (not all) that use either propane or butane canisters will also be able to use the other one. So how do you choose which kind to get? Here are a few factors to consider before buying your next gas canister.

• Price – Butane is less expensive than propane and a bottle filled with butane often contains a higher volume than a bottle of propane.

• Energy Efficiency – Butane provides about 12% more energy than propane when the same volumes are burned above freezing. This means that you won’t have to buy as many butane refills as you would propane, making it ideal for bringing along on camping trips when you need all of the backpack space you can get.

• Usability – The main difference between butane and propane is that butane doesn’t work well in low temperatures. When in temperatures lower than freezing, the gas will stay in its liquid form and there will not be enough pressure to release it and produce a flame.

• Availability – Propane is more widely available than butane, and may be a more convenient choice unless you order ahead or stock up on butane.

Many consumers choose to switch between the two gases, using propane in the winter and butane in the summer. The important thing to remember is that butane and propane require different settings in order to burn. You often have to change valves and fittings before you can switch which fuel you use. Some camp stoves do not care, but check the documentation that came with the stove.

A blend of both butane and propane fuel, works well in both summer and in cooler temperatures. Butane/Propane mix is the quintessential choice for avid backpackers.

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