How Much Water Evaporates When Making Coffee?

crazy by Editorial Staff | Posted on February 3rd, 2023

Making coffee is a process that requires a certain amount of water – but have you ever stopped to think about how much of the water is evaporating during the process?

It’s something many of us overlook, but it can have a huge impact on the final taste. In this blog post, we’ll look at how much water evaporates when making coffee and ways to ensure that the perfect cup of joe is achieved every time.

photo of coffee making

Understanding how much water evaporates when making coffee can help you better manage your resources and get the most out of your grounds.

This blog will dive into the science behind water evaporation, what affects it, and how much is lost in the brewing process. We’ll also provide some troubleshooting tips for those who have issues with their coffee makers that cause too much evaporation. So read on to learn more about water evaporation and coffee!

What is Water Evaporation?

Water evaporation is the process of liquid turning into a gas. It occurs when heat is applied to the liquid, causing molecules to move faster and become less bound to each other. This process happens naturally when hot air meets cold air, but it can also be sped up by boiling water or using a coffee maker.

When it comes to coffee, the water evaporates during the brewing process, allowing the flavor and aroma of coffee beans to be released into the drink. The amount of water that evaporates during the brewing process depends on several factors, such as the water’s temperature, the pot’s size, and the number of coffee grounds used.

Understanding these factors and troubleshooting any issues with your coffee maker can ensure you’re getting the most out of your cup of joe.

How Much Water is Used for Coffee?

When brewing a cup of coffee, the amount of water used is important in determining the taste and quality of your brew. Generally, the “Golden Ratio” is one to two tablespoons of ground coffee for every six ounces of water. This ratio can be adjusted depending on your preferences and the strength of the coffee you want to make.

Additionally, the grounds can absorb around twice their weight in water. So, when making eight cups of coffee, you should measure around 16 tablespoons of ground and 8 cups (64 ounces) of water. This will ensure you have the perfect water for a delicious cup of joe.

Should I Worry About Water Evaporates When Making Coffee

The movement of steam over the cup. Liquid evaporation. Black and white.

When making coffee, it is normal for some amount of water to evaporate. This is especially true for programmable drip coffee makers, which need to reach a certain temperature to extract the flavors and substances from the coffee grounds.

While some evaporation is normal, if you find that more water is evaporating than actually brewing your coffee, you may want to check the temperature of your machine. If it is too hot, it could be causing more water to evaporate than necessary.

However, as long as the temperature is within the recommended range for brewing, you should not worry about water evaporating when making coffee.

What Affects How Much Water Evaporates While Brewing Coffee?

The amount of water that evaporates while brewing coffee is affected by many factors.

Temperature, for example, plays a significant role in the evaporation rate. Water evaporates faster at higher temperatures, so use water near the boiling point for the best results.

The shape and size of the kettle also affect the water evaporation rate. Wider and shorter kettles lead to more evaporation than their taller and slimmer counterparts. The number of coffee grounds used will also influence the evaporation rate, as more grounds require more water to make a full cup of coffee.

Finally, water loss during the boil can be significantly affected by the heat source used to boil the coffee. All these factors should be considered when making coffee to get maximum flavor with minimal water loss.

How Long Does it Take for Coffee to Evaporate?

The time it takes for water to evaporate when making coffee depends on various factors. Generally speaking, a cup of coffee will lose about 1% of its water content per hour. Temperature, humidity, and sunlight affect how quickly water evaporates when making coffee.

In addition, the number of coffee grounds used can also influence the evaporation rate. By distilling your coffee, you can collect the steam and condense it back into liquid form. However, this process should only be done cautiously and requires specialized equipment.

If you have spilled some coffee while pouring, you can rest assured that the liquid will evaporate fairly quickly in most circumstances. Troubleshooting tips for coffee makers that evaporate water too quickly can help you save energy and money in the long run.

Does the Amount of Coffee Grounds Influence Evaporation?

The number of coffee grounds used to make coffee can affect the evaporation rate. Generally, more coffee grounds means more water is needed to brew the coffee, which can cause more water to evaporate during the process.

When using a higher ratio of coffee grounds to water, it’s important to adjust the amount of water accordingly. Additionally, finer grinds can increase the rate of evaporation and extraction, so be sure to adjust the grind size accordingly.

Does the size of the pot affect the evaporation rate?

The size of the pot can affect the rate of evaporation when making coffee. When the surface area of the water is larger, more evaporation occurs, while a smaller surface area leads to less evaporation. This means that more water can evaporate in a shorter period when using larger pots. On the other hand, when using smaller pots, less water evaporates over a longer period.

Additionally, because larger pots tend to take longer to heat up, this could lead to further differences in evaporation rates. Therefore, it’s important to consider the size of the carafe when brewing coffee and ensure that you don’t end up with too much or too little evaporation.

How Much Is Water Lost During Evaporation?

Make coffee with coffee maker

When making coffee, it is important to consider how much water is lost during evaporation. Generally speaking, it can be estimated that around 1.25 cups of the 8 cups of water typically used to make coffee will be lost due to evaporation.

This means that of the 8 cups, 1.25 cups will be lost in the form of steam or absorbed by the grounds. This is a significant amount of water and should be considered when making coffee.

Troubleshooting Tips for Coffee Makers That Evaporate Water

If you find that your coffee maker is evaporating a lot of water, there are a few troubleshooting tips you can try.

First, check to make sure the tank is full when brewing. If it isn’t, adding more water may help. Additionally, you can try using hotter water. The hotter the water, the less time it will take for the coffee to brew, and the less water that will evaporate during the process.

If you have a programmable coffee maker, you may also want to adjust the settings so that it’s not running longer than necessary. Finally, if the problem persists, it may be time to invest in a new coffee maker.


In conclusion, it is important to understand the evaporation rate of water when making coffee. The amount of water that evaporates while brewing coffee depends on several factors, including the water’s temperature, the pot’s size, and the number of coffee grounds used.

The evaporation rate of water can be reduced by boiling the water before brewing, but this will also affect the final product’s taste. Additionally, it is important to note that while some water may evaporate during brewing, it is mostly the water content and not the caffeine content that is lost.

You can achieve a perfect cup of coffee every time with proper care and attention to these factors.

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Disclosure: No compensation or free products were received in exchange for writing this review.


Editorial Staff

The editorial staff at Crazy Coffee Crave is a team of coffee enthusiasts & Baristas who enjoy the one thing we all think about as soon as we get up in the morning. Trusted by thousands of readers worldwide.