EER Calculator - Calculate Your Estimated Energy Requirement
Free online EER calculator to calculate your Estimated Energy Requirement. Get personalized calorie needs for weight maintenance, gain, or loss.
EER Calculator
Welcome to our comprehensive EER Calculator - the most accurate tool for calculating your Estimated Energy Requirement based on Institute of Medicine (IOM) standards.
EER represents the average dietary energy intake that maintains energy balance in healthy individuals with defined age, gender, weight, height, and physical activity levels. Unlike simple BMR calculators, EER specifically accounts for your daily activity level.
Our calculator uses the official IOM equations, which cover:
- Infants (0-36 months)
- Children (3-8 years)
- Adolescents (9-18 years)
- Adults (19+ years)
- Pregnancy and lactation
Key features include:
- Instant EER calculation using IOM-approved formulas
- BMR comparison using Mifflin-St Jeor equation
- Weight goal planning with 6 different options
- Personalized macronutrient distribution
- 30-day weight projection
- Expert insights and recommendations
- Support for metric and imperial units
- Completely free, no registration required
Whether you're planning weight loss, weight gain, or just want to maintain your current weight, this tool provides the scientific foundation for your nutrition goals.
- Accurate EER calculation using Institute of Medicine formulas
- Supports all age groups from infants to older adults
- Special calculations for pregnancy and lactation
- Personalized macronutrient recommendations
- 30-day weight projection based on your goals
- Comparison with BMR for better understanding
Frequently Asked Questions About EER
What is EER and how is it calculated?
EER (Estimated Energy Requirement) is the average dietary energy intake needed to maintain energy balance in healthy individuals. It's calculated using Institute of Medicine equations that consider age, gender, weight, height, and physical activity level. The formulas vary by age group, with specific adjustments for pregnancy and lactation.
What's the difference between EER and BMR?
BMR (Basal Metabolic Rate) is the energy needed at rest to maintain vital functions. EER (Estimated Energy Requirement) includes BMR plus energy for physical activity, digestion, and daily activities. EER is typically 20-50% higher than BMR depending on your activity level.
What are the physical activity levels for EER?
EER uses four activity levels: Sedentary (little to no exercise), Low Active (light exercise 1-3 days/week), Active (moderate exercise 3-5 days/week), and Very Active (hard exercise 6-7 days/week). Each level has specific physical activity coefficients (PA) used in the calculation.
How does pregnancy affect EER?
During pregnancy, EER increases: no change in 1st trimester, +340 kcal/day in 2nd trimester, and +452 kcal/day in 3rd trimester. During lactation, add 330 kcal/day for 0-6 months and 400 kcal/day for 7-12 months to support milk production. Always consult your healthcare provider during pregnancy.
What's a safe calorie deficit for weight loss?
A safe calorie deficit for weight loss is typically 250-750 kcal/day, corresponding to 0.25-0.75 kg/week. More rapid weight loss increases risk of muscle loss and nutrient deficiencies. Aim for gradual, sustainable changes and consult a healthcare professional for personalized guidance.
Calculate EER for a 30-year-old female, 165 cm, 70 kg, low active
For a 30-year-old female weighing 70 kg and 165 cm (1.65 m) with low activity: EER = 354 - (6.91 × 30) + 1.12 × [(9.36 × 70) + (726 × 1.65)] = 354 - 207.3 + 1.12 × (655.2 + 1197.9) = 146.7 + 1.12 × 1853.1 = 146.7 + 2075.5 = 2222 kcal/day.