Calorie Calculator
Estimate maintenance calories and set a simple cut or bulk target.
Inputs
Tip: 5'9" ≈ 175 cm
Tip: 165 lb ≈ 75 kg
Results
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About This Calculator
Your basal metabolic rate (BMR) estimates calories burned at rest. Maintenance calories add an activity multiplier based on your weekly exercise. Use the cut and bulk targets as starting points and adjust based on real results.
Formula
BMR (Mifflin-St Jeor) = 10×weight + 6.25×height ? 5×age + sex adjustment
About This Calculator
Calculate your daily calorie needs based on age, gender, height, weight, and activity level. Get personalized targets for weight loss, maintenance, or muscle gain using the Mifflin-St Jeor equation.
Frequently Asked Questions
How accurate is the Calorie Calculator compared to clinical measurements?
This calculator uses peer-reviewed medical formulas that provide reliable estimates for most adults. However, individual results can vary based on factors not captured by standard formulas, including body composition, genetic factors, medical conditions, and medications. These calculations are screening tools, not diagnostic instruments. For medical decision-making, always consult your healthcare provider who can consider your complete health history, perform physical examinations, and order appropriate lab tests for definitive measurements.
Should I consult a doctor before acting on these results?
Yes, we recommend discussing any health-related calculations with your healthcare provider before making significant changes to your diet, exercise routine, or health management plan. This calculator provides educational estimates based on population-level research and standard medical formulas. Your individual health needs may differ due to pre-existing conditions, medications, allergies, pregnancy, age-related factors, or other personal health variables. Your doctor can interpret these results in the context of your complete medical history and provide personalized recommendations.
What factors can make my results different from what this calculator shows?
Several factors can cause your actual values to differ from calculated estimates: age and sex (formulas may use population averages), body composition (muscle vs fat ratio affects many health metrics), genetics and family history, current medications (some affect metabolism, blood pressure, or cholesterol), chronic conditions (diabetes, thyroid disorders, kidney disease), altitude and climate, hydration status, time of day when measurements are taken, and recent food intake or exercise. For the most accurate baseline, take measurements at the same time each day under consistent conditions.
How often should I recalculate or recheck these health metrics?
For general wellness monitoring, recalculate monthly if you are actively working toward a health goal (weight loss, fitness improvement, dietary changes). For stable health maintenance, quarterly checks are sufficient. If you have a chronic condition being monitored by your doctor, follow their recommended schedule — typically every 3-6 months. Track your results over time to identify trends rather than focusing on single measurements, as daily fluctuations are normal for most health metrics.
Are the formulas used in this calculator evidence-based?
Yes, this calculator uses formulas derived from peer-reviewed medical research and endorsed by major health organizations. The specific equations are widely used in clinical practice and have been validated across diverse populations. However, no single formula is universally accurate for every individual — most health formulas were developed using study populations that may not perfectly represent your demographics. We cite the source formula where applicable so you can review the original research and discuss methodology with your healthcare provider.