Calorie Calculator:
Find Your Daily Calorie Needs
This free daily diet calculator works as a complete calorie intake calculator and maintenance calories calculator, estimating your basal metabolic rate (BMR) and total daily energy expenditure (TDEE) using the Mifflin-St Jeor equation. In seconds you’ll know your maintenance calories, a tailored calorie deficit or calorie surplus, and the macronutrient split to support your fitness goals.
Your Biometrics
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2,400
Calories / Day
*Targets based on your specific TDEE and Goal
Recommended Daily Menu
Target-hitting diet plan high protein menu — built to keep you full.
Fill in your biometrics and hit “Calculate My Daily Targets” above — your personalized menu will appear here instantly.
The 80/20 Rule
Weight loss is 80% diet and 20% exercise. While the Daily Diet Calculator helps you find your caloric baseline, the quality of food matters. Focus on whole, unprocessed foods to keep your insulin levels stable and your satiety high.
Fitness for Metabolism
Cardio burns calories in the moment, but strength training builds muscle—the engine of your metabolism. By increasing your lean muscle mass, you raise your BMR, meaning you burn more calories even while you sleep.
The Science of Deficits
To lose 1lb of fat per week, you need a deficit of roughly 3,500 calories. Using our Daily Diet Calculator, we automatically calculate a sustainable 500-calorie daily reduction to ensure you lose fat without sacrificing your energy or health.
BMR vs. TDEE: What’s the Difference?
Your basal metabolic rate (BMR) is the energy your body needs at complete rest just to keep your heart, lungs, and brain running. Your total daily energy expenditure (TDEE) layers your activity level on top of that resting metabolic rate, giving you a realistic picture of your true daily calorie requirements. This calculator uses the Mifflin-St Jeor equation, widely considered more accurate than the older Harris-Benedict equation for estimating BMR in most healthy adults.
Calorie Deficit vs. Calorie Surplus
A calorie deficit calculator approach — eating fewer calories than your TDEE — drives fat loss, while a calorie surplus calculator approach supports muscle gain when paired with strength training. Getting your energy balance right, rather than guessing at portion control, is the difference between spinning your wheels and steady progress toward your target body weight and body composition.
What Is a Maintenance Calories Calculator?
A maintenance calories calculator tells you the number of calories that keeps your weight exactly where it is today — no gain, no loss. It’s the starting point for every goal on this page: subtract calories to lose fat, add calories to build muscle, or simply hold steady at your maintenance calories if your weight is already right where you want it.
Health & Fitness FAQ
Everything you need to know about using the Daily Diet Calculator.
Why is protein important in weight loss?
Protein has the highest thermic effect of food (TEF), meaning your body burns more calories digesting it. It also preserves muscle mass during a calorie deficit, which is why a diet plan high protein in content tends to outperform low-protein diets for keeping weight off long-term.
How often should I recalculate my diet?
We recommend using the Daily Diet Calculator every 5-10 lbs of weight loss, as your metabolism adjusts to your new body weight.
Can I eat whatever I want if I stay under my calories?
Technically yes for weight loss, but for body composition and health, nutrient density is vital. High-sugar diets can lead to energy crashes and muscle loss.
Is the Mifflin-St Jeor formula accurate?
It is currently the most accurate formula for predicting BMR in healthy individuals, which is why it’s the core engine of our tool.
How many calories do I need daily?
It depends on your age, sex, height, weight, and activity level. Most adults need between 1,600 and 3,000 calories per day to maintain their current weight — enter your details above for a personalized daily calorie calculator result.
What is TDEE and how is it different from BMR?
TDEE (total daily energy expenditure) is your BMR plus the calories you burn through daily movement, exercise, and digestion. BMR alone only reflects your resting energy needs.
Is a 500-calorie deficit safe?
For most healthy adults, a moderate 500-calorie daily deficit is considered a safe and sustainable rate of weight loss, roughly one pound per week, without triggering excessive muscle loss or metabolic adaptation.
What activity level should I choose?
Be honest about your typical week: sedentary means little to no structured exercise, moderately active covers 3-5 workouts a week, and very active applies to daily intense training or a physically demanding job.
Does age or height affect my calorie requirements?
Yes. Metabolic rate naturally declines with age, and taller individuals with more body mass generally require more energy, so both factors are built directly into the BMR calculation.
How many calories should I eat to gain muscle?
A modest surplus of 300-500 calories above your TDEE, combined with adequate protein intake and consistent strength training, supports lean muscle gain without excessive fat gain.
What does a maintenance calories calculator actually calculate?
It combines your BMR with your activity level to estimate the calories your body burns in a day — that number is your maintenance level, the baseline every deficit or surplus in this guide is built from.