How Hot Is a Blue Flame?

Fire is used for various things like cooking and burning. It makes it a very important part of human life, especially when it’s on the good side and not the destructive one. However, how hot is a blue flame? This article will reveal everything you need to know.

When fire burns, it displays colors ranging from red, yellow, green, and blue. And if you are concerned about blue flame during a fire, this article will expose how important and hot a blue flame is.

However, when it comes to blue flame in fire, and you want to know the temperature, it’s easy. You should expect a temperature ranging from 2500°C to 3000°C. With this, you should expect a higher temperature from a gas burner like a Busen burner or wood fire.

Blue Flame in Fire Meaning

Blue Flame in Fire Meaning

Different colors will be seen when a fire is burning, like yellow, red, green, and blue. All this color has different meanings, but the blue flame is the one we will discuss.

A blue flame results from natural gas combustion: hydrocarbons, propane, and butane with ethane burn to produce a blue flame.

While LPG burns with blue flame between 1900- 2000 °C, a natural gas flame burns at 1800°C less than LPG.

Example of flame temperatures:

1. Candle Flame

Initially, a candle flame is measured in celsius when you use an infrared thermometer. However, the temperature of your candlelight is affected by factors like oxygen and the flame’s closeness to its environment, especially how fast the flame burns.

2. Bonfire

Bonfire is a modern take on the classic candle. Most are handcrafted from natural wax and are designed to fit perfectly into contemporary spaces.

When it burns, the temperature ranges from 600 – 1000°C

3. Wood fire

Wood fires are another form of fire that can be used for several purposes, like cooking. When burning wood, the fire temperature is always between 600 – 700°C.

4. Bunsen burner

This is a modern fire tool; it can be used at home and for outdoor purposes. It doesn’t have a stable fire temperature as it can be adjusted to the kind you want depending on what you want to prepare on it.

Benefits of Blue Flame

Blue flames are often considered to be more efficient and cleaner burning than yellow flames. This is because blue flames indicate that a fuel is burning with a complete, or nearly complete, combustion, meaning that it is burning with enough oxygen to convert most of the fuel into carbon dioxide and water.

In contrast, yellow flames indicate that a fuel is burning with incomplete combustion, which can produce carbon monoxide and other harmful byproducts.

Some benefits of blue flames include:

  • Increased energy efficiency: Blue flames are more efficient at converting fuel into heat, which can result in lower fuel costs and reduced emissions.
  • Improved indoor air quality: Blue flames produce fewer harmful byproducts than yellow flames, which can help to improve the indoor air quality in your home.
  • Reduced risk of fires: Blue flames are less likely to produce sparks or embers that can cause a fire, which can help to reduce the risk of fires in your home.
  • Enhanced aesthetic appeal: Many people find blue flames to be more visually appealing than yellow flames, especially when used in a fireplace or wood stove.

It is worth noting that some fuels, such as propane, are more likely to produce blue flames than others, such as wood or natural gas. If you are interested in using a fuel that produces blue flames, it is a good idea to research the various options and choose one that is suitable for your needs and preferences.

How Hot Is a Blue Flame

A blue flame is a low-level flame, not much hotter than a candle. Flame temperatures vary depending on the type of fuel used and the air temperature, but they usually range from about 2500°C to 3000°C

However, if you want to increase the flame’s intensity, you can increase the gas flow from its source.

Furthermore, the blue flame has more oxygen making it hotter. That’s why when you put on a gas and ignite it, it burns faster and at a higher rate.

How Hot Is the Blue Flame in a Wood Fire

A wood fire can be set up for different reasons, like campfires or pit fires. And talking about the temperature of blue flame in a wood fire is between 2500°C to 3000°C.

Although getting a blue flame during a wood fire can be determined by the wood you are using and the fire’s level.

So if you want to get the blue flame in a woof fire, you need to make the fire small when there is enough oxygen.

Is White Fire Hotter Than Blue Fire

Both white and blue are flame colors that can be seen during a fire, but they have different temperatures.

White flame temperature is between 1200 – 1400°C. The hotter a white fire becomes, the higher its temperature.

However, a blue fire has a temperature between 2500°C and 3000°C, which makes it hotter than a white fire.

In addition, blue fire cooks better and faster than white fire.

Is Blue Fire Hotter Than Orange

Is Blue Fire Hotter Than Orange

Most time, when you set up a fire, the color shows orange. It is not just related to the gas stove but word burning and other forms of fire.

Orange fire temperature is lesser than that of blue fire; it burns at 1100°C to 1300°C while Blue fire burns at a higher temperature that is up to 3000°C

A blue fire may be cooler, but it is the hottest, and this is due to the consumption of more gas. That’s why you see hydrocarbon gasses burning blue when you use them.

On the other hand, wood, candles, and coal all burn orange at 80%.

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Why Is Blue Flame Hotter Than Yellow

A yellow flame is part of the colors seen during a fire, indicating its own. This yellow flame burns around 1,000 – 1,000 °C due to the production of incandescent fine soot particles found in the fire.

When it comes to the debate about the hottest between blue and yellow flame, a Blue flame is hotter. When complete combustion leads to higher temperatures, you can only get a blue flame.

This color can change depending on the supply or presence of oxygen. So the fire burns and gets hotter when there is an increase in Oxygen supply.

Note: Your fire will burn thoroughly with less waste of soot if there is an adequate oxygen supply. 

Is Blue the Hottest Flame Color?

The color of every flame determines how hot it can be, making it essential to consider the color based on what you are about to use the fire for in or experiment.

There are different fire colors, ranging from blue, orange, red, white, and yellow. All these fire colors have their temperature range, which determines how hot they can be. We must consider their peak temperature and combustion capacity to determine the hottest.

The hottest fire is the blue fire, with a temperature of up to 3000°C and complete combustion. It can only be possible if you are using hydrocarbon, which gives complete combustion.

How to Make Blue Fire

Blue fire doesn’t just get blue; some combustion and elements cause the fire. Copper(I), calcium chloride, and butane are notable elements that determine blue fire. You can add this element to your firebase to get a blue flame.

Also, the supply of natural gas, hydrocarbon, and propane can cause a blue fire if you supply it adequately. 

In addition, sufficient oxygen supply can also contribute to how blue your fire may be.

How to Make Blue Fire with Salt

Making a fire burn blue with salt is possible with some steps.

1. You can make a blue fire with salt by boiling water and adding 2 tablespoons.

2. Boil a pot of water and add 2 tablespoons of salt.

3. While boiling, you can mix the salt with the water with your hands or a spoon. You should keep stirring the mixture until it turns into a blue fire.

4. If you want your fire to burn brighter, add sugar or honey.

What Colour Should a Gas Fire Flame Be?

What Colour Should a Gas Fire Flame Be

The color of a gas fire flame can vary depending on the type of gas being burned and the conditions of the burn. In general, a healthy gas fire flame should be blue, with some yellow tips.

A blue flame indicates that the gas is burning with a complete, or nearly complete, combustion, meaning that it is burning with enough oxygen to convert most of the fuel into carbon dioxide and water.

This combustion type is generally considered more efficient and cleaner-burning than incomplete combustion, which can produce carbon monoxide and other harmful byproducts.

If the flame is mostly yellow, it may indicate that the gas is not burning with complete combustion and that there may be an issue with the burners or the ventilation system. A yellow flame can also be a sign of a gas leak, which can be dangerous and should be addressed immediately.

If you are using a gas fire and notice that the flame is mostly yellow or orange, it is a good idea to have the appliance checked by a professional to ensure that it is functioning properly and safely.


This article on how hot is a blue flame has revealed how hot a blue fire will be, an element that can cause a blue fire, and factors that stand as a determinant and sustain it.