Where do these calculations come from?

Three public sources: the USDA Dietary Guidelines for Americans, 2020–2025 edition (food group patterns and dietary patterns); the National Academies' Dietary Reference Intakes (DRIs) for energy, macronutrients, vitamins, and minerals; and the IOM Estimated Energy Requirement (EER) equations for personalized calorie needs. Every number we display has a documented federal-source citation.

Are these the same numbers the USDA published?

Yes. We use the published EER equations, the USDA Food Patterns table at 12 calorie levels (1,000–3,200 kcal), and the National Academies DRI tables verbatim. We do not adjust, smooth, or extrapolate the source data. Any output you see is reproducible from the published tables.

What changed in January 2026?

On January 7, 2026, USDA and HHS released the 2025–2030 Dietary Guidelines for Americans, launched RealFood.gov as the new consumer-facing nutrition site, and retired the MyPlate.gov website. The 2025–2030 edition replaced the MyPlate visual with an inverted food pyramid emphasizing "real food." The MyPlate Plan calculator was removed. MyPlate.food continues to implement the 2020–2025 Dietary Guidelines tables — the last edition that featured MyPlate as the federal nutrition icon.

Why isn't this on RealFood.gov?

RealFood.gov, launched January 7, 2026, is built around the new 2025–2030 edition, an AI meal-planning assistant, and educational content rather than a personalized MyPlate-format calculator. The interactive MyPlate Plan calculator was removed during the transition and not rebuilt. MyPlate.food fills that gap as an independent project. We are not affiliated with USDA — see the footer disclaimer.

How accurate are DRI values for individuals vs. populations?

DRIs (RDAs and AIs) are population-level reference values designed so that 97–98% of healthy individuals in a life-stage group meet their needs at the recommended intake. Individual needs vary based on genetics, health status, medications, and physical activity. Use DRI values as a starting point and consult a registered dietitian or clinician for individualized guidance.

Why do my calorie needs differ from another calculator?

Different tools use different equations. We use the IOM Estimated Energy Requirement equations published in the Dietary Reference Intakes for Energy. Other calculators use Mifflin–St Jeor, Harris–Benedict, or proprietary regressions, which can differ by 100–300 kcal/day. The federal MyPlate Plan tool used IOM EER, which is what we use here.

Are these recommendations medical advice?

No. The calculator outputs estimates derived from public federal nutrition guidance for healthy individuals. They are not personalized medical advice and are not a substitute for evaluation by a registered dietitian, physician, or other qualified health professional. People with specific clinical conditions (diabetes, kidney disease, eating disorders, pregnancy complications, etc.) should consult a clinician before changing their diet.

How often is this calculator updated?

The Dietary Guidelines for Americans are revised every five years by USDA and HHS jointly. The 2025–2030 edition was released January 7, 2026 and replaced the MyPlate visual with an inverted food pyramid. MyPlate.food continues to implement the 2020–2025 edition by design — to remain a MyPlate-format calculator. The DRI tables are revised by the National Academies on their own multi-year cadence per nutrient.

How Calorie Needs Are Calculated — EER Equations & USDA Food Patterns (2026)

The exact math behind your daily calorie needs: IOM Estimated Energy Requirement (EER) equations, physical-activity coefficients, and USDA food-pattern tables — every number sourced.