how many calories do you burn in the sauna

Sweating It Out: How Many Calories Do You Burn in the Sauna?

Saunas have long been celebrated for their therapeutic benefits. But the question often arises: how many calories do you burn in the sauna? This article dives deep into the science behind this query, shedding light on both the physiological effects of saunas and their role in our wellness journey. Read on to discern fact from fiction.

Basics of Caloric Burn

Caloric Burn

Calories, in essence, measure the energy our bodies consume through food and expend through activities, both voluntary (like walking or exercising) and involuntary (like breathing or digesting). Every activity we engage in, no matter how trivial, uses up calories. This is termed as our Total Daily Energy Expenditure (TDEE) and is made up of several components:

  • Basal Metabolic Rate (BMR): This is the energy expended when our bodies are at rest. It accounts for the calories burned while carrying out essential functions, such as breathing, maintaining body temperature, and supporting cell function.
  • Physical Activity: This refers to the calories burned during conscious movement, like walking, exercising, or doing household chores.
  • Thermic Effect of Food: Our bodies burn calories to digest, absorb, and process the nutrients in the foods we eat.
  • Non-Exercise Activity Thermogenesis (NEAT): These are the calories burned during involuntary movements, such as fidgeting.

Factors like age, gender, weight, muscle mass, and genetics play a significant role in determining an individual’s TDEE and, by extension, the number of calories burned in various settings, including the sauna.

Understanding Sauna Heat

Sauna Heat

Saunas have been integral to several cultures worldwide, owing to the profound relaxation and therapeutic benefits they offer. They come in different forms:

  • Traditional Saunas (or Finnish Saunas): These use wood or electric heaters to heat up rocks, which subsequently warm the air in the room. The temperature can range between 180°F (80°C) and 200°F (90°C). Occasionally, water is poured on the rocks to increase humidity, intensifying the perception of heat.
  • Infrared Saunas: Unlike traditional saunas that heat the air, infrared saunas use infrared lamps to warm your body directly. This means the air remains cooler, often around 120°F (50°C) to 140°F (60°C), but the body still sweats profusely due to direct infrared radiation.
  • Steam Rooms: These are more about humidity than pure heat. They use steam to create a hot, moist environment, with temperatures typically around 110°F (45°C) to 120°F (50°C). The high humidity makes the air feel hotter than it actually is.

The core principle remains consistent across these variations: saunas aim to raise our core body temperature, causing us to sweat. Sweating is the body’s natural way of cooling itself and, in the process, excreting certain waste products.

Mechanism of Caloric Burn in the Sauna

Caloric Burn in the Sauna

Saunas essentially induce an artificial fever-like state. When you sit in the heated environment of a sauna, your body responds in a few noteworthy ways:

  • Increased Heart Rate: As your body temperature rises, your heart starts pumping blood faster to dissipate heat. This increase in heart rate can be likened to the rate during light to moderate cardio exercises. For many individuals, the heart rate might elevate to 100 to 150 beats per minute while in the sauna, leading to an increase in calorie burn.
  • Thermogenesis: This term literally means “heat creation.” Your body expends energy when trying to cool itself down in the sauna. It does this primarily by sweating, wherein the evaporation of sweat helps reduce the body’s core temperature. This process of producing sweat and cooling the body requires energy, resulting in calorie consumption.
  • Temporary Metabolic Rate Boost: Exposure to the high temperatures of the sauna can result in a temporary increase in metabolic rate. This means that for a short duration post-sauna, your body might continue to burn calories at a slightly elevated rate.

While it’s tempting to believe that a session in the sauna is equivalent to a gym workout in terms of calorie burn, it’s essential to understand that the primary calorie-burning mechanism in a sauna is passive, whereas exercising involves active muscle engagement and a sustained increase in metabolic rate.

How Many Calories Do You Burn in the Sauna?

How Many Calories

Estimating the exact number of calories burned in the sauna can be a complex task, as it depends on several variables. Here’s a deeper dive into these factors and their implications:

  • Duration of Sauna Session: Naturally, the longer you stay in a sauna, the more calories you’ll burn. However, it’s crucial to note that prolonged exposure can be harmful, so it’s essential to find a balance.
  • Individual Weight: People with a higher body weight generally burn more calories during any activity, including while resting in a sauna, compared to those with a lower body weight.
  • Temperature of the Sauna: The higher the temperature, the more your body has to work to cool itself down. Consequently, saunas with higher temperatures may result in slightly higher calorie burn. This, however, should be approached with caution since extreme temperatures can pose health risks.
  • Type of Sauna: Infrared saunas heat the body directly rather than heating the air. Some studies suggest that this might lead to a higher calorie burn as the body absorbs the heat. However, more research is needed to substantiate these claims.
  • Acclimatization: Regular sauna users might notice a decrease in calorie burn over time as their bodies become acclimated to the heat, leading to increased efficiency in cooling down and lesser energy expenditure.

Taking these factors into consideration, some general estimates can be given. While precise numbers can differ based on individual factors and sauna conditions, research generally suggests that an average person might burn between 30 to 60 calories during a 15-minute session in a traditional sauna.

This is a rough estimate and can be likened to the caloric expenditure of sitting at rest or light walking for the same duration. However, it’s essential to keep in mind that individual experiences and caloric burns can vary widely.

How Many Pounds Do You Lose in a Sauna?


While the topic of caloric burn in a sauna is fascinating, another frequently asked question revolves around how many pounds one can potentially lose during a sauna session. To address this, it’s essential to differentiate between actual fat loss and temporary weight loss due to fluid reduction.

Temporary Weight Loss

The most noticeable weight loss after a sauna session is mainly due to the loss of fluids from sweating. An individual can lose between 0.5 to 2 pounds or even more during a single sauna session, depending on factors such as the duration, temperature of the sauna, and the individual’s body composition. This weight loss, however, is fleeting.


Once you drink water post-sauna or consume a meal, most, if not all, of the lost weight is regained. This is because the body is rehydrating, compensating for the fluids lost during the sweating process.

True Fat Loss

The minimal calories burned in the sauna, as discussed in the previous section, can contribute to fat loss, but this contribution is minor. To lose one pound of fat, one needs to burn approximately 3,500 calories more than they consume. Given the estimated calorie burn in a sauna is much lower than this figure, relying on sauna sessions alone for significant weight loss would be ineffective.

Potential Benefits for Weight Loss

While direct weight loss from a sauna might be minor and temporary, indirect benefits could support a weight loss journey. For instance, regular sauna use might help with muscle recovery after workouts, allowing for more frequent and effective exercise sessions. Additionally, the relaxation and stress relief from saunas can contribute to better sleep and reduced cortisol levels, both of which can indirectly support weight management.

In conclusion, while saunas can result in a temporary drop in pounds due to fluid loss, true and sustainable weight loss requires a more comprehensive approach that includes a balanced diet and regular physical activity. Saunas can play a supplementary role in this journey by providing relaxation, promoting recovery, and potentially offering minor caloric burn.

Debunking Myths


Saunas have been surrounded by several myths and misconceptions, especially regarding their role in weight loss and calorie burn:

1. Weight Loss vs. Fat Loss

One of the most common misconceptions is equating the weight loss experienced during a sauna session to fat loss. The truth is, the weight lost in a sauna is predominantly water weight. As you sweat, your body loses fluids, leading to a temporary drop in weight. However, once you rehydrate, which is crucial after a sauna session, this weight is typically regained.

2. Detoxification Claims

Another popular belief is that sweating in a sauna leads to the expulsion of toxins and substantial calorie burn. While it’s true that sweat can contain trace amounts of toxins, the primary organs responsible for detoxification are the liver and kidneys. The amount of “detoxification” achieved through sweating is minimal at best.

3. Relying on Saunas for Weight Loss

While there is some calorie burn associated with saunas, relying on them as a primary weight loss tool is misguided. Saunas can complement a weight loss regimen but should not replace a balanced diet and regular exercise.

By understanding the real science behind saunas, individuals can make informed decisions about their usage and set realistic expectations regarding their potential benefits.

FAQs About Caloric Burn and Weight Loss in Saunas

1. How many calories do I burn in a 30-minute sauna session?

While individual results vary, an average person might burn between 60 to 120 calories in a 30-minute sauna session. Factors like weight, sauna temperature, and individual metabolism can influence this.

2. Is the weight I lose in a sauna permanent?

No, the weight lost during a sauna session is primarily due to water loss from sweating. This weight is typically regained once you rehydrate.

3. Do infrared saunas burn more calories than traditional saunas?

Infrared saunas heat the body directly, which some believe might lead to a higher calorie burn. However, research on this topic is still inconclusive. The difference, if any, might be marginal.

4. How often should I use the sauna for optimal benefits?

Using a sauna 2-3 times a week can offer relaxation and recovery benefits. However, it’s essential to listen to your body, stay hydrated, and avoid overuse.

5. Can I combine my workout and sauna session?

Yes, many people use the sauna post-workout for relaxation and muscle recovery. However, ensure you hydrate adequately and avoid going into a sauna immediately after an intense workout when your body temperature is already elevated.

6. Are there any risks associated with using a sauna?

While saunas are generally safe for most people, overexposure can lead to dehydration and heat-related illnesses. Those with certain medical conditions or pregnant women should consult a physician before using a sauna.


While saunas offer a pleasurable experience and a minor boost in caloric burn, it’s vital to approach their usage with realistic expectations. Embracing a holistic approach that incorporates a balanced diet and exercise remains the best route for weight management.

AboutCorinne Switzer

Corinne is an avid reader and takes a keen interest in conspiracy theories. When not busy with her day job, she likes to indulge the writer in her and pens columns on a wide range of topics that cover everything from entertainment, healthy living to healthcare and more.