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Updated: Jan 9, 2024, 6:26am
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Table of Contents
- TDEE Calculator Methodology
- What Is Total Daily Energy Expenditure (TDEE)?
- How Is TDEE Calculated?
- Frequently Asked Questions (FAQs)
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If you’re looking for an accurate estimate of how many calories your body burns daily, consider calculating your total daily energy expenditure, or TDEE. Using science-backed calculation methods, TDEE estimates the amount of energy (or number of calories) your body burns over a 24-hour period, factoring in how much energy it uses while at rest, your typical level of physical activity and the thermic effect of food metabolism.
You can get an accurate estimate of your TDEE by using the Forbes Health TDEE Calculator below, which was created under the guidance of Forbes Health Advisory Board members. Select the gender that most closely matches your hormonal makeup and enter your age, height, weight and activity level to see an estimate of how calories your body burns daily.
TDEE Calculator Methodology
The Forbes Health TDEE Calculator estimates the number of calories your body burns daily based on your basal metabolic rate (BMR)and an activity multiplier that reflects how much you exercise in a given week and the thermic effect of food. It utilizes the Mifflin-St Jeor equation to provide these calculations, as the American Council on Exercise (ACE) suggests it’s the most accurate method for estimating basal metabolic activity.
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What Is Total Daily Energy Expenditure (TDEE)?
Total daily energy expenditure (TDEE) estimates how many calories your body burns daily by accounting for three major contributing factors: your basal metabolic rate (BMR), your activity level and the thermic effect of food metabolism.
Basal Metabolic Rate (BMR)
Basal metabolic rate (BMR) estimates the number of calories your body burns over a 24-hour period while at rest. For your body to be truly “at rest,” your digestive system must be inactive, which typically requires a 12-hour fasting period, and your external environment needs to be a neutral temperature. BMR comprises the largest portion of most people’s TDEE.
Activity Level
The more you move your body on a regular basis, the more energy it consumes to maintain its baseline. People who exercise regularly or maintain a very active job or lifestyle generally burn more calories daily than someone who exercises less often and maintains a fairly sedentary job or lifestyle.
The Forbes Health TDEE calculator uses the following ranges to help determine the appropriate activity multiplier for you:
- Sedentary: Little or no exercise
- Lightly active: Exercise one to three days a week
- Moderately active: Exercise three to five days a week
- Active: Exercise six to seven days a week
- Very active: Hard exercise six to seven days a week
Thermic Effect of Food
The thermic effect of food is the amount of energy your body uses to metabolize the food you eat. The Mifflin-St Jeor equation used in the calculator above accounts for this estimated contribution to your body’s daily calorie burn.
How Is TDEE Calculated?
There are several equations you can use to calculate your TDEE, but the Forbes Health TDEE Calculator uses the Mifflin-St Jeor equation because experts from the American Council on Exercise (ACE) consider it to be the most accurate. It first estimates your basal metabolic rate (BMR) based on your gender, age, height and weight inputs. Then, it determines the appropriate activity multiplier based on your activity level input, providing an estimate of your TDEE.
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Frequently Asked Questions (FAQs)
What is the best TDEE calculator?
There are multiple formulas commonly used to calculate BMR, including (but not limited to) the revised Harris-Benedict equation, the Katch-McArdle equation and the Mifflin-St Jeor equation. Activity multipliers are then used to determine TDEE. Today, experts consider the Mifflin-St Jeor equation to be the most accurate, which is why we use it in our calculator tool above.
Should I eat my TDEE to lose weight?
No, your TDEE is the amount of energy your body burns on a daily basis and therefore the amount of energy you must consume to maintain your current weight. If your goal is to lose weight, you need to consume fewer calories (or less energy) than your TDEE. Use our free calorie calculator to determine a safe and sustainable way to reach your weight goal.
Is it necessary to calculate your Total Daily Energy Expenditure?
TDEE can be a helpful tool for anyone looking to estimate how many calories their body burns on a daily basis so they can approach their health and wellness goals effectively. Regardless of whether you’re looking to gain weight, lose weight or maintain your current weight, understanding your body’s baseline is a vital starting point.
Sources
References
- Melanson EL. The effect of exercise on non-exercise physical activity and sedentary behavior in adults. Obes Rev. 2017;18(Suppl 1):40–49.
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Alena HallEditor
Alena is a professional writer, editor and manager with a lifelong passion for helping others live well. She is also a registered yoga teacher (RYT-200) and a functional medicine certified health coach. She brings more than a decade of media experience to Forbes Health, with a keen focus on building content strategy, ensuring top content quality and empowering readers to make the best health and wellness decisions for themselves.
Jessica DiGiacintoEditor
Jessica is a writer and editor with over a decade of experience in both lifestyle and clinical health topics. Before Forbes Health, Jessica was an editor for Healthline Media, WW and PopSugar, as well as numerous health-related startups. When she isn't writing or editing, Jessica can be found at the gym, listening to a health or true crime podcast, or spending time outside. She also really enjoys bread (even though she's not supposed to eat it).
