Not medical advice
Content does not diagnose, treat, prevent, or cure any condition and does not establish a clinician-patient relationship.
Calculator limitations
Results depend on user inputs, population equations, simplified assumptions, and code. Actual energy needs, body composition, hydration, health risk, and pregnancy dating can differ.
Pregnancy
Pregnancy pages perform date arithmetic only. They cannot confirm pregnancy, determine viability, interpret ultrasound, assess symptoms, or replace prenatal care.
Nutrition and hydration
General targets may be inappropriate for children, pregnancy, breastfeeding, eating-disorder history, kidney or heart disease, fluid restrictions, medication effects, or other medical conditions.
Emergencies
Do not use this website during a medical emergency. Contact local emergency services or an appropriate qualified professional.
Professional guidance
If a result conflicts with advice from a clinician or registered dietitian who knows your history, follow the qualified professional—not the calculator.