Calorie Calculator – Find Your Daily Energy Needs
Calorie Calculator that estimates your daily calorie needs based on your body and activity level. No sign-up, no cost, just science-based estimates.
We built this tool for anyone curious about how many calories their body burns each day.
Enter your details, choose your activity level, and get your Total Daily Energy Expenditure (TDEE) along with your Basal Metabolic Rate (BMR).
All calculations happen in your browser. Nothing is stored or uploaded anywhere.
Daily Calorie Needs (TDEE)
Calculate your total daily energy expenditure using the Mifflin-St Jeor equation
Weight Loss / Gain Goal
Find your target calorie intake to reach your goal weight
Calories Burned by Activity
Estimate calories burned during physical activities using MET values
Macro Nutrients Breakdown
Get your personalized protein, carbs, and fat targets based on your goal
Choose a calculation mode from the four available options above.
Select your unit system (Metric or Imperial) and enter your details.
Click Calculate to get instant results with detailed breakdown.
Use the results to plan your diet, workouts, and health goals.
Calculation Modes
- Daily Calories: BMR + TDEE via Mifflin-St Jeor equation
- Weight Goal: Calorie target for loss or gain with timeline
- Activity Burn: Calories burned using MET values
- Macros: Personalized protein, carbs & fat breakdown
Common Uses
- Plan your daily calorie intake for weight management
- Track calories burned during workouts and activities
- Set up a macro split for muscle gain or fat loss
- Estimate how long to reach your goal weight
- Compare different activity types for efficiency
Choose a calculation mode from the four options.
Select your unit system and enter your details.
Click Calculate to get instant results.
Use the results to plan your nutrition and fitness.
Facebook
WhatsApp
Understanding how many calories your body needs can feel like solving a puzzle. Between metabolism, activity level, and individual goals, there is a lot to consider. Whether you are looking to lose weight, build muscle, or simply maintain where you are, having a reliable starting point makes the journey much easier.
This calorie calculator is designed to give you science-based estimates using the Mifflin-St Jeor equation, one of the most accurate formulas available. With four calculation modes, you can find your daily energy needs, set weight goals, estimate calories burned during activities, and get personalized macro targets. All calculations happen locally in your browser, keeping your information private.
What People Use This For
Here are some real ways people use this tool.
Planning Daily Calorie Intake
Someone wants to understand how many calories their body burns on a typical day. They calculate their TDEE and use it as a starting point for meal planning.
Setting Weight Loss or Gain Goals
A person sets a target weight and uses the Weight Goal mode to estimate how many calories to eat daily and how long it might take to reach their goal.
Estimating Calories Burned During Workouts
Someone finishes a run or gym session and wants to know roughly how many calories they burned. They use the Activity Burn mode to get an estimate based on their weight and activity.
Planning Macro Splits
A person focused on fitness wants to know how much protein, carbs, and fat to eat daily. They use the Macros mode to get a personalized breakdown based on their goal.
Comparing Activity Efficiency
Someone curious about which exercises burn more calories uses the Activity Burn mode to compare different activities like running, cycling, or swimming.
Health and Fitness Tracking
A person uses the tool periodically to see how their calorie needs change as their weight or activity level changes over time.
Did you know? The Mifflin-St Jeor equation, used in this calculator, was developed in 1990 and is considered more accurate than the older Harris-Benedict equation for estimating Basal Metabolic Rate. It accounts for age, sex, height, and weight, and has been validated across diverse populations. This is why it is widely used by nutrition professionals today.
How the Calculation Works
Science-based estimates, every time. Here is exactly what happens when you click Calculate.
Our tool uses the Mifflin-St Jeor equation, which is considered one of the most accurate formulas for estimating Basal Metabolic Rate (BMR). BMR is the number of calories your body burns at complete rest, just to keep you alive and functioning.
Your BMR is then multiplied by an activity factor based on your lifestyle: sedentary, lightly active, moderately active, very active, or extra active. The result is your Total Daily Energy Expenditure (TDEE) — the estimated calories you burn in a day.
Calculation Modes
Four modes to handle different needs.
📊 Daily Calories
Calculates your BMR and TDEE using the Mifflin-St Jeor equation. Shows your maintenance calories based on your activity level. This is your starting point for any nutrition plan.
🎯 Weight Goal
Estimates how many calories to eat daily to reach a target weight, along with an approximate timeline. Uses a safe deficit or surplus of 300 to 500 calories per day.
🏃 Activity Burn
Estimates calories burned during specific activities based on your weight and duration. Uses MET values (Metabolic Equivalent of Task), a standard in exercise science.
🥑 Macros
Provides a personalized breakdown of protein, carbohydrates, and fats in grams based on your calorie target and goal: weight loss, maintenance, or muscle gain.
Important Limitations to Understand
These calculations are estimates, not medical prescriptions.
- Estimates, not exact measurements. Real calorie needs vary based on genetics, metabolism, body composition, and other individual factors.
- Activity burn is approximate. MET values provide a general estimate. Actual calories burned depend on intensity, fitness level, and individual variation.
- Not medical advice. This tool is for informational and planning purposes only. For specific health conditions or medical nutrition advice, consult a registered dietitian or healthcare professional.
- Individual results vary. Weight loss and gain timelines are estimates. Real results depend on consistency, adherence, and individual factors like sleep and stress.
Pro tips for accurate results: Be honest about your activity level. Overestimating activity leads to higher calorie estimates. Choose the level that matches your average week, not your best week. Use the Weight Goal mode for a realistic target. A deficit of 300 to 500 calories per day is generally considered safe and sustainable for weight loss. Combine with a food diary for better results. Use the calorie target as a guide, then track what you eat to see how it compares. Recalculate as your weight changes. Calorie needs decrease as you lose weight. Recalculate every few weeks to stay on track. Adjust based on real results. If you are not losing weight at the expected rate, adjust your intake slightly. These are starting points, not strict rules.
Frequently Asked Questions
1. What formula does this calorie calculator use?
It uses the Mifflin-St Jeor equation for BMR, which is considered one of the most accurate formulas for most adults. TDEE is calculated by multiplying BMR by an activity factor based on your lifestyle.
2. How many calories should I eat to lose weight?
A common approach is to eat 300 to 500 calories below your TDEE for gradual, sustainable weight loss. The Weight Goal mode can give you a personalized target based on your goal weight and timeline.
3. How accurate is the Activity Burn calculator?
It uses MET values (Metabolic Equivalent of Task), a standard in exercise science. Results are reliable estimates, but actual calories burned depend on intensity, fitness level, and individual factors like age and gender.
4. What is a good macro split for fat loss?
Higher protein intake helps preserve muscle during weight loss. A common starting point is 40 percent carbohydrates, 35 percent protein, and 25 percent fat. The Macros mode gives you personalized targets in grams based on your calorie goal.
5. Is this tool accurate for athletes?
These formulas work for most adults, but athletes with high muscle mass may have different calorie needs. The results are a good starting point, but individual adjustments may be needed based on performance and recovery.
6. Does this tool work on a phone?
Yes. Our calorie calculator works on iPhone, Android, and tablets. Enter your details and get results instantly. The interface is fully responsive and touch-friendly.
7. Is my data private?
Yes. All calculations happen in your browser. No personal information is stored or uploaded anywhere. Your health data stays yours.
8. Is this free?
Yes. No payment, no account, no credit card required. Calculate as many times as you want, with any settings, for any purpose.
9. How often should I recalculate my calorie needs?
It is a good idea to recalculate every 5 to 10 pounds of weight change, or when your activity level changes significantly. Your calorie needs decrease as you lose weight and increase as you gain muscle.
10. Can I use this for muscle gain?
Yes. The Weight Goal mode can be set to a target weight above your current weight. The Macros mode can adjust protein targets for muscle building. A moderate calorie surplus of 200 to 400 calories per day is typically recommended for lean muscle gain.