TDEE Calculator

What is TDEE Calculator?

TDEE Calculator estimates your Total Daily Energy Expenditure, the total number of calories you burn per day from all sources: basal metabolism, daily activity, and exercise. It uses the Mifflin-St Jeor equation for basal metabolic rate and multiplies by an activity factor. You enter age, gender, height, weight, and activity level. The tool returns your TDEE and three targets: weight loss (TDEE minus 500 calories), maintain (TDEE), and gain (TDEE plus 500 calories). Metric (centimeters, kilograms) or US (feet, inches, pounds) units are supported. Activity levels range from BMR only to extra active. The calculation runs entirely in your browser with no account or data storage.

TDEE is the single most important number for weight management. If you eat exactly your TDEE every day, you will maintain your weight. Eat less and you lose; eat more and you gain. The 500-calorie rule is widely used: a daily deficit of 500 calories typically produces about 0.5 kg (1 lb) of fat loss per week, while a surplus of 500 supports similar gain. TDEE encompasses everything: the calories you burn at rest (BMR), the calories from moving around (NEAT), the calories from structured exercise (EAT), and the calories from digesting food (TEF). This tool bundles all of that into one number using activity multipliers.

The TDEE Calculator and the Calorie Calculator use the same underlying formula. The difference is framing: TDEE emphasizes what you burn (expenditure), while the Calorie Calculator emphasizes what you need to eat (intake). For weight maintenance, they are the same number. Some people find it easier to think in terms of "how much do I burn?" and then decide how much to eat relative to that. Others prefer "how much should I eat?" Either way, the output is identical. Choose the tool that fits your mental model.

Activity level is the biggest variable. Two people with the same height, weight, age, and gender can have very different TDEEs based on activity. A sedentary office worker might burn 1,800 calories per day; an athlete in heavy training might burn 3,500 or more. NEAT (non-exercise activity thermogenesis) varies widely: fidgeting, walking, standing, and daily habits can add hundreds of calories. The tool uses standard multipliers; your actual TDEE may be 10–15% higher or lower. Use the result as a starting point and adjust based on your real-world weight change over several weeks.

Who Benefits from This Tool

People managing their weight benefit most from knowing their TDEE. Whether you want to lose fat, build muscle, or maintain, understanding how many calories you burn each day is the first step. Fitness and nutrition enthusiasts use it to set precise targets. Athletes and coaches use it to ensure adequate fueling for performance and recovery without overeating. Health educators use it to teach the concept of energy balance. Anyone needing a daily calorie baseline finds it useful.

Bodybuilders and physique athletes use TDEE to set bulk and cut phases. People who have hit a plateau often discover their TDEE has dropped as they lost weight and need to recalculate. Those who struggle with "eating enough" can use the gain target to ensure a surplus. The tool serves both beginners and advanced users. It complements but does not replace professional advice for medical conditions, pregnancy, or specialized populations.

Key features

Mifflin-St Jeor Formula

Uses the same evidence-based formula as the Calorie Calculator. BMR is computed from age, gender, height, and weight. TDEE = BMR × activity multiplier. This formula is recommended by major health organizations and has been validated across diverse populations.

Metric and US Units

Select metric (cm, kg) or US (feet/inches, lbs). Results are always in calories per day. The formula handles both unit systems seamlessly.

Seven Activity Levels

BMR only, Sedentary, Light, Moderate, Active, Very Active, Extra Active. Each corresponds to a multiplier (1.0 to 2.0 or higher) that accounts for exercise and daily movement. Choose the level that best matches your typical week.

Weight-Goal Targets

Lose: TDEE minus 500. Maintain: TDEE. Gain: TDEE plus 500. All three displayed together for quick comparison. You can use these as targets or adjust (e.g. 300 deficit for slower loss).

How to use

1. Select units (metric or US). Enter your age, gender, height, and current weight.
2. Choose your activity level based on your typical week. Be honest; overestimation inflates your target.
3. Complete captcha if required. Click Calculate to see your TDEE and weight-goal targets.
4. Review the results. Use Sample to load example data or Reset to clear. Recalculate when your weight or activity changes.

Common use cases

• Setting a calorie target for weight loss based on total expenditure
• Setting a calorie surplus for muscle gain or bulking
• Estimating daily energy expenditure for meal planning
• Planning a diet around maintenance after reaching a goal weight
• Teaching TDEE and activity multiplier concepts in fitness or nutrition classes
• Understanding why weight loss has stalled (TDEE drops as you lose weight)
• Comparing your intake to estimated burn to identify over- or under-eating
• Recalculating after a significant weight change or change in activity
• Providing a baseline before working with a dietitian or coach
• Modeling different activity levels to see impact on calorie needs

Tips & best practices

Select your activity level carefully. Most people overestimate; if unsure, err toward sedentary or light. Recalculate when your weight changes by 5 kg or more or when your activity level changes. Use the ±500 targets as a starting point; you can use a smaller deficit (250–300) for slower loss or a larger one for faster results, though very large deficits can be hard to sustain. Combine with professional guidance if you have health conditions. Track your intake and weight over several weeks to validate; if you eat at the "maintain" target and gain or lose, your actual TDEE differs from the estimate.

NEAT varies widely between people. Two office workers with the same job may burn different amounts based on commuting, standing, fidgeting, and after-work activity. The tool gives a population average; your actual TDEE may be 10–15% higher or lower. Use it as a baseline and refine with real data. For muscle gain, a modest surplus (200–400 calories) often produces leaner gains than 500. Patience and consistency matter more than aggressive targets.

Limitations & notes

TDEE is an estimate. Individual variation is significant. The Mifflin-St Jeor formula does not account for body composition (muscle vs fat), so very muscular individuals may need more and those with higher body fat may need slightly less. Activity multipliers are approximate; real-world movement varies. The tool is not a substitute for medical or dietitian advice. It is not intended for pregnancy, illness, eating disorders, or specialized populations without professional input.

FAQs