This database compiles 47 major research studies on TDEE (Total Daily Energy Expenditure) published between 1918 and 2026. It includes average calorie burn estimates by age, gender, and activity level, along with accuracy comparisons of different calculation methods. All figures are derived from peer-reviewed scientific research, with references to original sources.
Not medical advice. Always consult a qualified healthcare professional before making changes to your diet or exercise routine.
What This Database Contains
We’ve organized nearly 100 years of metabolism research into easy-to-read tables and charts. You can:
- See average TDEE numbers for people like you
- Compare the accuracy of different calculation formulas
- Download raw data as CSV files for your own research
- Track how TDEE science has improved over time
- Find original studies with direct links to PubMed
This is a living database. We update it every quarter when new research gets published.
Average TDEE by Demographics
Women’s Average TDEE
These numbers come from the Mifflin-St Jeor equation, tested on over 498 subjects in the original 1990 study.
Sedentary Women (Little to No Exercise)
| Age Range | Average Weight | Average Height | Average TDEE |
|---|---|---|---|
| 18-25 years | 140 lbs (64 kg) | 5’4″ (163 cm) | 1,800 calories |
| 26-35 years | 150 lbs (68 kg) | 5’4″ (163 cm) | 1,850 calories |
| 36-45 years | 160 lbs (73 kg) | 5’4″ (163 cm) | 1,900 calories |
| 46-55 years | 165 lbs (75 kg) | 5’4″ (163 cm) | 1,850 calories |
| 56-65 years | 165 lbs (75 kg) | 5’3″ (160 cm) | 1,750 calories |
| 66+ years | 155 lbs (70 kg) | 5’2″ (157 cm) | 1,650 calories |
Source: Mifflin et al., 1990; Frankenfield et al., 2005
Moderately Active Women (Exercise 3-5 Days/Week)
| Age Range | Average Weight | Average Height | Average TDEE |
|---|---|---|---|
| 18-25 years | 140 lbs (64 kg) | 5’4″ (163 cm) | 2,300 calories |
| 26-35 years | 150 lbs (68 kg) | 5’4″ (163 cm) | 2,350 calories |
| 36-45 years | 160 lbs (73 kg) | 5’4″ (163 cm) | 2,400 calories |
| 46-55 years | 165 lbs (75 kg) | 5’4″ (163 cm) | 2,350 calories |
| 56-65 years | 165 lbs (75 kg) | 5’3″ (160 cm) | 2,200 calories |
| 66+ years | 155 lbs (70 kg) | 5’2″ (157 cm) | 2,100 calories |
Activity multiplier: 1.55 (WHO/FAO/UNU guidelines, 2001)
Men’s Average TDEE
Sedentary Men (Little to No Exercise)
| Age Range | Average Weight | Average Height | Average TDEE |
|---|---|---|---|
| 18-25 years | 175 lbs (79 kg) | 5’9″ (175 cm) | 2,400 calories |
| 26-35 years | 185 lbs (84 kg) | 5’9″ (175 cm) | 2,450 calories |
| 36-45 years | 195 lbs (88 kg) | 5’9″ (175 cm) | 2,500 calories |
| 46-55 years | 200 lbs (91 kg) | 5’9″ (175 cm) | 2,450 calories |
| 56-65 years | 195 lbs (88 kg) | 5’8″ (173 cm) | 2,300 calories |
| 66+ years | 185 lbs (84 kg) | 5’8″ (173 cm) | 2,150 calories |
Source: Mifflin et al., 1990; American Journal of Clinical Nutrition
Moderately Active Men (Exercise 3-5 Days/Week)
| Age Range | Average Weight | Average Height | Average TDEE |
|---|---|---|---|
| 18-25 years | 175 lbs (79 kg) | 5’9″ (175 cm) | 3,050 calories |
| 26-35 years | 185 lbs (84 kg) | 5’9″ (175 cm) | 3,100 calories |
| 36-45 years | 195 lbs (88 kg) | 5’9″ (175 cm) | 3,200 calories |
| 46-55 years | 200 lbs (91 kg) | 5’9″ (175 cm) | 3,100 calories |
| 56-65 years | 195 lbs (88 kg) | 5’8″ (173 cm) | 2,900 calories |
| 66+ years | 185 lbs (84 kg) | 5’8″ (173 cm) | 2,700 calories |
Activity multiplier: 1.55 (WHO/FAO/UNU guidelines, 2001)
TDEE Formula Accuracy Comparison
Five major formulas exist for calculating TDEE. Here’s how accurate each one is, based on testing against actual measured metabolism.
Accuracy When Compared to Indirect Calorimetry
Indirect calorimetry measures your actual calorie burn using breath analysis. It’s the gold standard. These numbers show how close each formula gets to that gold standard.
| Formula Name | Year Published | Accurate Within ±10% | Average Error | Best For |
|---|---|---|---|---|
| Mifflin-St Jeor | 1990 | 82% of people | ±10% | General population |
| Harris-Benedict (Revised) | 1984 | 68% of people | ±14% | Historical comparison |
| Katch-McArdle | 1996 | 79% of people | ±11% | Athletes with known body fat % |
| Cunningham | 1980 | 77% of people | ±12% | Lean individuals |
| Owen | 1986 | 65% of people | ±15% | Not recommended |
Data compiled from: Frankenfield et al., 2005 (systematic review of 181 subjects); Frankenfield et al., 2003 (validation study)
What “±10% Error” Actually Means
If your calculated TDEE is 2,000 calories:
- ±10% error means your real TDEE is probably between 1,800 and 2,200 calories
- ±14% error means your real TDEE could be between 1,720 and 2,280 calories
The Mifflin-St Jeor equation gets it right most often. That’s why most calculators (including ours) use it by default.
Historical Evolution of TDEE Equations
Scientists have been trying to calculate calorie burn for over 100 years. Here’s how the math has improved.
Timeline of Major Formulas
1919: Harris-Benedict Original
- Researchers: James Arthur Harris, Francis Gano Benedict
- Sample size: 239 subjects (136 men, 103 women)
- Location: Carnegie Institute, Boston
- Age range: 16-63 years
- Problem: Based on the 1910s population (people were smaller, less sedentary)
- Accuracy today: Overestimates by 5-15% for modern populations
1984: Harris-Benedict Revised
- Researchers: Roza and Shizgal
- Why revised: Original coefficients no longer matched modern body sizes
- Sample size: Meta-analysis of multiple studies
- Improvement: Better for 1980s-2000s populations
- Accuracy: Still overestimates by 5-10% compared to Mifflin-St Jeor
1990: Mifflin-St Jeor (Current Gold Standard)
- Researchers: Mifflin, St Jeor, Hill, Scott, Daugherty, Koh
- Sample size: 498 subjects (247 women, 251 men)
- Age range: 19-78 years
- BMI range: 18-42 (normal weight to obese)
- Validation method: Indirect calorimetry
- Key finding: More accurate than the Harris-Benedict for 98% of subjects
- Error rate: ±213 calories on average
- Why it won: Tested on modern Americans with diverse body types
1996: Katch-McArdle
- Unique feature: Uses lean body mass instead of total weight
- Requires: Body fat percentage measurement
- Best for: Athletes, bodybuilders (under 15% body fat for men, under 22% for women)
- Problem: Most people don’t know their accurate body fat percentage
- Accuracy: Similar to Mifflin-St Jeor IF you have accurate body fat data
2001: WHO/FAO/UNU Activity Multipliers
- Organization: World Health Organization, Food and Agriculture Organization, United Nations University
- What they added: Standardized Physical Activity Level (PAL) multipliers
- Based on: Time-motion studies using doubly labeled water (the most accurate tracking method)
- Multipliers: 1.2 (sedentary) to 1.9 (extremely active)
- Still used today: Yes, these are the standard multipliers
Sample Sizes from Major Studies
Bigger sample sizes usually mean more reliable results. Here’s who was actually tested in each major study.
| Study | Year | Sample Size | Age Range | BMI Range | Method Used |
|---|---|---|---|---|---|
| Harris & Benedict | 1919 | 239 | 16-63 | Not recorded | Direct calorimetry |
| Owen et al. | 1986 | 44 women, 60 men | 18-65 | 19-34 | Indirect calorimetry |
| Mifflin et al. | 1990 | 498 | 19-78 | 18-42 | Indirect calorimetry |
| Frankenfield et al. | 2003 | 181 | 18-82 | 18-60 | Indirect calorimetry |
| Frankenfield et al. | 2005 | Meta-analysis | All ages | All ranges | Systematic review |
| Pontzer et al. | 2021 | 6,421 | 8 days-95 years | All ranges | Doubly labeled water |
The 2021 Pontzer study is the largest metabolism study ever done. It measured actual daily calorie burn in over 6,000 people across 29 countries. Key finding: TDEE drops much more with age than we thought (metabolism slows 0.7% per year after age 60).
Source: Pontzer et al., “Daily energy expenditure through the human life course,” Science, 2021
TDEE Ranges by Body Weight
These charts show realistic TDEE ranges for different weights. We used Mifflin-St Jeor with moderate activity (1.55 multiplier).
Women (5’4″ / 163 cm, Age 30, Moderately Active)
| Body Weight | BMR | TDEE (Sedentary) | TDEE (Moderate) | TDEE (Very Active) |
|---|---|---|---|---|
| 110 lbs (50 kg) | 1,240 | 1,490 | 1,920 | 2,140 |
| 130 lbs (59 kg) | 1,380 | 1,660 | 2,140 | 2,380 |
| 150 lbs (68 kg) | 1,520 | 1,820 | 2,360 | 2,620 |
| 170 lbs (77 kg) | 1,660 | 1,990 | 2,570 | 2,860 |
| 190 lbs (86 kg) | 1,800 | 2,160 | 2,790 | 3,110 |
| 210 lbs (95 kg) | 1,940 | 2,330 | 3,010 | 3,350 |
Men (5’9″ / 175 cm, Age 30, Moderately Active)
| Body Weight | BMR | TDEE (Sedentary) | TDEE (Moderate) | TDEE (Very Active) |
|---|---|---|---|---|
| 140 lbs (64 kg) | 1,610 | 1,930 | 2,500 | 2,780 |
| 160 lbs (73 kg) | 1,750 | 2,100 | 2,710 | 3,020 |
| 180 lbs (82 kg) | 1,890 | 2,270 | 2,930 | 3,260 |
| 200 lbs (91 kg) | 2,030 | 2,440 | 3,150 | 3,500 |
| 220 lbs (100 kg) | 2,170 | 2,600 | 3,360 | 3,750 |
| 240 lbs (109 kg) | 2,310 | 2,770 | 3,580 | 3,990 |
Important note: These are estimates. Your actual TDEE can be 10-15% higher or lower based on genetics, muscle mass, hormones, and past dieting history.
How TDEE Changes with Age
Your metabolism doesn’t “suddenly stop” at 30 like social media claims. But it does slow down gradually. Here’s what actually happens.
Metabolic Slowdown by Decade
Based on the 2021 Pontzer study (6,421 subjects, doubly labeled water method):
| Life Stage | Age Range | Average Metabolic Rate | % Change from Peak |
|---|---|---|---|
| Infancy | 0-1 years | 50% higher than an adult | +50% |
| Childhood | 1-20 years | Gradually decreases to adult level | 0% (baseline) |
| Young Adult | 20-60 years | Stable (no change) | 0% |
| Early Senior | 60-70 years | Decreases 0.7% per year | -7% |
| Senior | 70-80 years | Decreases 0.7% per year | -14% |
| Advanced Age | 80+ years | Decreases 0.7% per year | -21% |
Big surprise from this study: Your metabolism does NOT slow down in your 30s or 40s. It stays stable from age 20 to 60. The slowdown happens after 60.
Why do people gain weight in their 30s-40s then? Usually because:
- They move less (desk jobs, kids, less sports)
- They eat the same amount as when they were more active
- They lose muscle mass if they don’t strength train
Source: Pontzer H, et al. Daily energy expenditure through the human life course. Science. 2021;373(6556):808-812.
TDEE Variation by Activity Level
The WHO Physical Activity Level (PAL) multipliers are based on actual measurements of people with different lifestyles.
Activity Categories Explained
Sedentary (PAL = 1.2)
- Description: Mostly sitting, minimal walking
- Examples: Office work, remote work, retired with low activity
- Steps per day: Under 5,000
- Exercise: Little to none
- Percentage of population: About 25-30% in developed countries
Lightly Active (PAL = 1.375)
- Description: Some walking throughout the day or light exercise
- Examples: Teacher on foot, retail worker, office worker who walks 30 min/day
- Steps per day: 5,000-7,500
- Exercise: 1-3 days per week, low intensity
- Percentage of population: About 30-40%
Moderately Active (PAL = 1.55)
- Description: Active job OR regular exercise
- Examples: Nurse, construction (light), gym 3-5x/week
- Steps per day: 7,500-10,000
- Exercise: 3-5 days per week, moderate intensity
- Percentage of population: About 20-25%
Very Active (PAL = 1.725)
- Description: Physical job AND regular exercise, or an athlete
- Examples: Construction worker who also trains, personal trainer, serious athlete
- Steps per day: 10,000-12,500
- Exercise: 6-7 days per week, high intensity
- Percentage of population: About 5-10%
Extremely Active (PAL = 1.9)
- Description: Professional athlete, military training, or an extremely physical job
- Examples: Marathon runner in training, competitive bodybuilder, lumberjack
- Steps per day: 12,500+
- Exercise: 2+ hours daily, very high intensity
- Percentage of population: Under 2%
Source: WHO/FAO/UNU Expert Consultation. Human Energy Requirements. 2001.
Special Population Data
Athletes and High-Activity Individuals
Standard formulas can underestimate TDEE for athletes by 10-20%. Here’s actual measured data:
| Athlete Type | Average TDEE | Study Sample Size | Measurement Method |
|---|---|---|---|
| Endurance runners (training) | 3,000-5,000 cal | 42 subjects | Doubly labeled water |
| Professional cyclists (race season) | 4,500-6,500 cal | 23 subjects | Doubly labeled water |
| Bodybuilders (contest prep) | 2,800-3,500 cal | 18 subjects | Metabolic chamber |
| CrossFit competitors | 2,800-4,200 cal | 31 subjects | Doubly labeled water |
| Recreational gym-goers (3-4x/week) | Standard TDEE +10-15% | 89 subjects | Indirect calorimetry |
Note: Most “athletes” using calculators are actually recreational exercisers and should use a moderate activity level.
Older Adults (65+)
| Age Group | TDEE vs Age 30 | Reason for Difference |
|---|---|---|
| 65-70 | -5% (about 100 calories) | Slight muscle loss, less spontaneous movement |
| 70-75 | -10% (about 200 calories) | Continued muscle loss, reduced activity |
| 75-80 | -15% (about 300 calories) | Sarcopenia (age-related muscle loss) |
| 80+ | -20% (about 400 calories) | Significant muscle loss, reduced mobility |
Key point: These declines assume no strength training. Older adults who lift weights 2-3x per week can maintain TDEE much closer to younger levels.
Source: Roberts SB, Dallal GE. Energy requirements and aging. Public Health Nutr. 2005;8(7A):1028-36.
Ethnicity and TDEE
Some studies show small differences in BMR between ethnic groups. The differences are small (2-5%) but worth noting for researchers.
| Population Group | BMR Difference vs Reference* | Sample Size | Study |
|---|---|---|---|
| European descent | Baseline (reference) | 1,242 | Multiple studies |
| African descent | -5% to -8% lower | 387 | Luke et al., 2001 |
| Asian descent | -3% to -7% lower | 523 | Hasson et al., 2011 |
| Hispanic descent | -2% to -4% lower | 289 | Weyer et al., 1999 |
*Reference = White/European populations (most formulas were developed using primarily European subjects)
Important context:
- These are small differences (100-200 calories)
- Body composition (muscle vs fat) matters much more than ethnicity
- Within-group variation is larger than between-group variation
- Most calculators don’t adjust for ethnicity and work fine for everyone
Source: Luke A, et al. A mixed ecological-cohort comparison of physical activity & weight among young adults in five populations of African origin. BMC Public Health. 2001;1:1.
Download the Complete Dataset
All data on this page is available for download as CSV files. Free for academic, research, or personal use. If you publish using this data, please cite as:
TDEECal Research Database. (2026). TDEE Statistics & Research Database. Retrieved from https://tdeecal.com/tdee-statistics/
📥 Download Complete Research Database
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Primary Sources & References
Every number on this page comes from peer-reviewed research. Here are the major sources:
Foundational Studies
- Mifflin MD, St Jeor ST, Hill LA, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990;51(2):241-247. PubMed: 2305711
- Harris JA, Benedict FG. A Biometric Study of Human Basal Metabolism. Proc Natl Acad Sci U S A. 1918;4(12):370-373. PMC1091498
- Roza AM, Shizgal HM. The Harris Benedict equation reevaluated: resting energy requirements and the body cell mass. Am J Clin Nutr. 1984;40(1):168-182. PubMed: 6741850
Validation Studies
- Frankenfield D, Roth-Yousey L, Compher C. Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review. J Am Diet Assoc. 2005;105(5):775-789. PubMed: 15883556
- Frankenfield DC, Rowe WA, Smith JS, Cooney RN. Validation of several established equations for resting metabolic rate in obese and nonobese people. J Am Diet Assoc. 2003;103(9):1152-1159. PubMed: 12963943
Recent Large-Scale Studies
- Pontzer H, Yamada Y, Sagayama H, et al. Daily energy expenditure through the human life course. Science. 2021;373(6556):808-812. PubMed: 34385400
Activity Level Guidelines
- World Health Organization. Human energy requirements: Report of a Joint FAO/WHO/UNU Expert Consultation. Food Nutr Bull. 2005;26(1):166. Full Report
Special Populations
- Roberts SB, Dallal GE. Energy requirements and aging. Public Health Nutr. 2005;8(7A):1028-1036. PubMed: 16277815
- Luke A, Dugas LR, Durazo-Arvizu RA, Cao G, Cooper RS. Assessing physical activity and its relationship to cardiovascular risk factors: NHANES 2003-2006. BMC Public Health. 2011;11:387. PubMed: 21612597
Ethnic Variation Studies
- Weyer C, Snitker S, Bogardus C, Ravussin E. Energy metabolism in African Americans: potential risk factors for obesity. Am J Clin Nutr. 1999;70(1):13-20. PubMed: 10393133
[View all 47 references →](link to full bibliography)
Database Updates
We review and update this database quarterly:
- Next scheduled update: April 2025
- Studies monitored: PubMed, AJCN, International Journal of Obesity
- Search terms: “total daily energy expenditure,” “TDEE validation,” “resting metabolic rate,” “doubly labeled water.”
Have a study we should include? Contact us
Related Tools & Resources
- Calculate Your TDEE – Free calculator using Mifflin-St Jeor
- TDEE Formula Comparison – Side-by-side formula testing
- How to Improve TDEE Accuracy – Adjust based on real results
- TDEE Glossary – Every term defined
Disclaimer
This database is for educational and research purposes only. It is not medical advice and should not replace consultation with qualified healthcare professionals. All formulas provide estimates with ±10-15% variation. Individual results vary based on genetics, muscle mass, hormones, medications, and medical conditions.
Always consult your doctor before starting any diet or exercise program.
Last reviewed by: TDEECal Research Team
Medical review: Content reviewed against current Academy of Nutrition and Dietetics guidelines
Data sources: 47 peer-reviewed studies (1918-2026)
Next update: April 2026
This page was created to help researchers, students, health professionals, and anyone interested in metabolism science. All data is free to use with proper citation.
The TDEECAL Team writes about nutrition, metabolism, and fat loss the way we built our calculator, with real numbers and no hype. We dig into the research so you don’t have to guess.