Disclaimer

Not Medical Advice

CalcMacros provides nutritional estimation tools for informational and educational purposes only. The content on this website — including all calculator results, blog posts, and other information — does not constitute medical advice, nutritional counseling, or a clinical recommendation.

Estimates Only

All calculator results are mathematical estimates based on population-level formulas (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle). These formulas carry inherent margins of error. Individual results may vary significantly based on genetics, hormonal factors, gut microbiome, medications, medical conditions, and other factors that no formula can fully account for.

The widely-cited variance in BMR between individuals with identical measurements can be as large as ±300 kcal/day. Treat all results as starting estimates and adjust based on real-world outcomes.

Consult a Professional

Before making significant changes to your diet or exercise routine — especially if you have or suspect any medical condition, are pregnant, breastfeeding, under 18, over 65, or taking any medication — consult a qualified healthcare professional, registered dietitian, or physician.

This is particularly important for:

• Very low calorie diets (below 1,200 kcal/day for women or 1,500 kcal/day for men)
• Ketogenic or very low carbohydrate diets
• Individuals with diabetes, kidney disease, heart disease, or eating disorder history
• Anyone using our tools to manage weight during pregnancy

No Endorsement

References to specific foods, supplements, or nutrition strategies on this site do not constitute endorsements. We do not receive compensation for mentioning specific products unless explicitly disclosed as sponsored content.

Affiliate Disclosure

CalcMacros may participate in affiliate marketing programs. If we link to products and you make a purchase, we may receive a commission at no extra cost to you. All such links will be disclosed clearly.

External Links

We are not responsible for the content, accuracy, or practices of any external websites linked from this site. External links are provided for convenience only.