Maintenance Calorie Calculator - Free Daily Calorie Needs
Calculate your daily maintenance calories based on Mifflin-St Jeor equation. Get personalized macro splits, meal plans, and weight projections.
About This Maintenance Calorie Calculator
The Maintenance Calorie Calculator estimates how many calories your body needs daily to maintain your current weight. It uses three evidence-based formulas: the Mifflin-St Jeor equation (recommended by the Academy of Nutrition and Dietetics as the most accurate), the revised Harris-Benedict equation, and the Katch-McArdle formula (which incorporates body fat percentage for greater accuracy).
The calculator multiplies your Basal Metabolic Rate (BMR) by an activity factor (Physical Activity Level, PAL ranging from 1.2 to 2.4) to determine your Total Daily Energy Expenditure (TDEE). Beyond basic calorie calculation, this tool provides personalized macronutrient distribution, meal timing guides, weight change projections, and a zigzag calorie cycling plan to prevent metabolic adaptation.
Whether you want to find how many calories to maintain weight, determine your TDEE for bodybuilding, or plan a calorie deficit for weight loss, this calculator delivers comprehensive results tailored to your individual needs. Typical adult maintenance calories range from 1600-2400 kcal/day for women and 2000-3000 kcal/day for men, according to the U.S. Department of Health.
- Three proven BMR formulas for maximum accuracy
- Personalized macronutrient split (protein, carbs, fat)
- 5-meal distribution guide with calorie targets
- 24-week weight change projection timeline
- Zigzag calorie cycling to prevent plateaus
- Expert recommendations based on your BMI and goals
Frequently Asked Questions
How do I figure out my maintenance calories?
To find your maintenance calories, first calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation: BMR = 10 x weight(kg) + 6.25 x height(cm) - 5 x age - 161 for women, or + 5 for men. Then multiply BMR by your activity level (1.2 for sedentary to 2.4 for athletes). The result is your Total Daily Energy Expenditure (TDEE), which represents your maintenance calories.
What is maintenance calorie?
Maintenance calories are the total number of calories your body needs in a day to maintain your current weight without gaining or losing. This equals your Total Daily Energy Expenditure (TDEE), which combines your Basal Metabolic Rate (energy for basic bodily functions) with calories burned through physical activity and digestion.
Which maintenance calorie calculator is most accurate?
The Mifflin-St Jeor equation is considered the most accurate for the general population, with studies showing it predicts BMR within 10% of measured values. For lean individuals who know their body fat percentage, the Katch-McArdle formula can be more accurate since it accounts for lean body mass.
Is it safe to eat below maintenance calories?
Eating below maintenance calories is safe and necessary for weight loss, but the deficit should be moderate. A 300-500 kcal deficit promotes sustainable loss of 0.3-0.5 kg per week. Never drop below 1200 kcal/day for women or 1500 kcal/day for men without medical supervision, as this can cause nutrient deficiencies and metabolic slowdown.
Can 1500 calories be maintenance?
Yes, 1500 calories can be a maintenance level for petite, sedentary women. For example, a 50-year-old woman who is 152 cm tall and weighs 50 kg with minimal exercise would have a TDEE around 1450-1550 kcal/day. However, this is unusually low for most adults, and individual needs vary based on age, height, weight, and activity level.
Why am I not losing weight eating 1500 calories a day?
If you are not losing weight on 1500 calories, your actual TDEE may be lower than estimated. This can happen due to metabolic adaptation from prolonged dieting, underestimating food intake, overestimating activity levels, or hormonal factors like thyroid issues. Try tracking intake precisely for 2 weeks, reduce by 100-200 kcal, or increase physical activity.
How to lose 20 pounds in 3 months?
Losing 20 pounds (9 kg) in 3 months requires a deficit of approximately 7700 kcal per kg, totaling about 70,000 kcal over 90 days, or a daily deficit of roughly 778 kcal. This is aggressive but achievable for some. Combine a 500 kcal dietary deficit with 278 kcal burned through daily exercise. Monitor progress weekly and adjust as needed.