Is Fart Flammable?

In this blog post, we will answer the question, “is fart flammable?”. We will also discuss the compositions of farts, the possibility of catching fire when farting near a flame, can you make farts more or less flammable, and can you generate power from farts.

Is fart flammable?

Yes. Fart is flammable. The hydrogen and methane content in the fart make it flammable. Hydrogen sulfide, oxygen, and carbon dioxide can also be found in farts. 

In most circumstances, the volume of flammable gases is not enough to trigger an explosion, even though they can ignite.

Hydrogen and methane are the most combustible gases in human farts. This implies that they are liable to catch fire.

It’s not uncommon for our bums to catch fire when flammable gases mix with the oxygen in the air around our bums. Indeed, hydrogen is so flammable that it can even be utilized as rocket fuel.

Sulfur does not contribute to the flammability of farts.

What is the composition of farts?

Fart comprises non-odorous gasses including hydrogen, oxygen, nitrogen, carbon dioxide, and methane gas that make up more than 99 percent of the total composition.

Nitrogen is the primary gas in the digestive tracts of patients with gas-inducing issues. The digestive tract does not create nitrogen or oxygen; these elements are obtained from the ambient air instead. 

Hydrogen (H2), carbon dioxide (CO2), and methane (CH4) are produced in the gut and account for 74% of flatus volume, with oxygen and nitrogen accounting for the remaining 25%. 

The inflammability of farts is due to the presence of hydrogen and methane gasses.

The majority of these farts are produced by ingesting air and digesting food. It is through the digestive system that airborne nitrogen and oxygen are transported. 

A common fart contains significant amounts of nitrogen since it is unhindered, comprising 78% of Earth’s atmosphere. However, nitrogen can’t catch fire.

Then, there is a tiny quantity of hydrogen sulfide in farts (which gives out the rotten egg smell) and other gases that come from fermentation or other processes that occur when gut microorganisms feast on fiber and other things in the food of the host. 

Can you catch fire when farting near an open flame?

However, in most cases, it is a matter of position. To catch fire, you need to get the flame as close as possible to the source of the gas. Flames must be kept at a safe distance from clothing or other items that might burn up to protect the farter.

If you sitting with someone that is smoking, then suddenly you feel the urge to fart, you don’t need to worry about the fire risk, because your position is not close enough to cause a fire. 

The worst that can happen is they smell your farts.


In this blog post, we have discussed that fart is flammable because of its hydrogen and methane content. You can catch fire if you fart too close to the open flame. 

Some people’s farts might be more or less flammable than others depending on the methane content in them. However, despite its flammability, farts are not enough to generate power. Please comment down below if you have more questions about fart flammability.

Can you make farts more or less flammable?

Yes. There is a possibility that one’s farts are more or less flammable than others.

Methane, one of the most flammable components in farts, is not found in large quantities in the flatus of most people. The measurable quantity of methane in farts that can be measured is present in just around one-third of the population. 

Farts that contain a more significant amount of methane are more flammable than others. 

It’s not quite obvious why not everyone generates methane in their farts, but it might be because of the microorganisms that stay in one’s intestines. 

Since the discovery of methanogens in humans, there have been just three recognized microbes: Methannobrevibacter oralis, Methanospaera stadmagnae, and Methaniobrevibacter smithii.

However, a small study indicated that individuals who did create methane only did so when given a large amount of fiber in their meals for the trial. 

For all 10 participants, the fiber-free form of their farts included nearly all nitrogen. The typical fart had just 3.6 percent methane with the fiber variant. Hydrogen and nitrogen constituted 51% of the flatus of these people (30%).

Only five of the nine feces samples studied by Miller et al. contained archaea capable of producing methane gas. 

The amount of methane in human farts may be linked to obesity because a bacteria called Archaea oxidizes hydrogen into methane gas, enhancing the metabolic capacity to absorb fatty acids from meals. 

While genetics may play some impact, scientists have shown that where you inhabit may help predict whether or not you produce methane. 

For example, just 34% of Norwegians and 35% of Minneapolis residents emit methane, compared to 77% of Nigerians and 87% of South Africans.

In addition, compared to young children, adult females are more likely to emit detectable methane levels in their farts. 

Moreover, the possibility that you will make methane is increased if both of your parents do, according to one research, with a 95% chance that the offspring of two methane producers would do so.

Besides the discomfort, new research has revealed that methane generation is linked to various digestive disorders such as diverticulitis and inflammation of the colon, IBS, and colon cancer. 

Some speculate that the methane slows “intestinal transit time,” although this has not been proven conclusively.

FAQ: Is Fart Flammable? 

Can you generate power from fart?

No. Fart is not enough to generate power. Let’s do the math.

Only hydrogen and methane can be burned to extract energy from farts’ mixture of gasses. Hydrogen has an energy density of 2.8 watt-hours per liter, while methane has an energy density of 10.5 watt-hours per liter. 

The typical fart is 90 mL. Thus it contains around 0.11025 watt-hours of potential energy on a per-person basis.

If farts were actually used to create electricity, then the heating system is the most fart-inducing device in the house, according to a new study.

When it comes to generating heat, the average combi boiler consumes an amazing 13,600 kilowatt-hours each year, which is about 1.5 million average-sized farts.

The annual energy consumption for medium-sized homes in the UK is, on average, 33,681 kWh. In order to meet that demand, you’ll need 3.7 million human farts. 

You’ll need 4.1 million farts to power your home if you live in a large house. A staggering 2.5 million human farts are required, even in the smallest residences.

Of course, if we could deal with the enormous amount of inconveniences and awkwardness that would result from using vast amounts of farts, it could help overcome our energy crisis.


Abdullah A, Faisal S, Jan H, Zainab R, Rahman A, Khan A, Bibi B, Ishaq H. A Perspective Study on Oral-Fecal Transmission of COVID-19, its Prevention and Management. International Cardiovascular Forum Journal 2020;20:10-15.DOI: 10.17987/icfj.v20i0.695,gases%20being%20hydrogen%20and%20methane.

What was missing from this post which could have made it better?

Leave a Comment