Adult Calorie Needs Calculator
Estimate the energy intake associated with maintaining current weight using the 2023 National Academies adult Estimated Energy Requirement equations. The result shows the selected equation and every activity assumption.
Planning estimate for weight-stable adults age 19 or older; not a diet prescription or medical advice. Do not use this adult equation for children, teens, pregnancy, or breastfeeding. Those life stages use separate energy equations and professional guidance may be appropriate.
Enter your scenario
Use the details that match your situation. Your estimate stays in this browser.
How this estimate works
- The calculator selects one of the eight 2023 DRI adult EER equations using the sex and physical activity category entered.
- That equation combines age in years, height in centimeters, and weight in kilograms to estimate daily energy needed for weight maintenance.
- The result is rounded to the nearest 10 kcal/day and displays the exact coefficients and selected activity assumption.
Primary and official health sources
- National Academies 2023 Dietary Reference Intakes: adult EER equations
- NIDDK: adult-only calorie planning limitations and medical disclaimer
The National Academies report provides separate equations for pregnancy, lactation, and people under 19. NIDDK likewise limits its adult planning tool and advises consulting a health professional for personal medical questions.
Frequently asked questions
Which calorie formula does this use?
It uses the 2023 Dietary Reference Intakes adult Estimated Energy Requirement equations, with a separate equation for each sex and activity category.
Can I use this during pregnancy or breastfeeding?
No. The National Academies provides separate life-stage equations for pregnancy and lactation. This calculator intentionally excludes those cases, as well as children and teens.