Medical Disclaimer

These calculators are provided for educational and informational purposes only. They are not medical advice, diagnosis, or treatment. Results are estimates and may not apply to every person. Do not use calculator results to start, stop, or change medication or treatment. Consult a qualified healthcare professional for personal medical advice.

5 Nutrition Tools

Anemia & Nutrition Calculators

Educational tools for nutrition and blood health. Cannot diagnose anemia — diagnosis requires CBC, iron studies, and clinical evaluation.

Hemoglobin Unit Converter

Convert hemoglobin between g/dL (US), g/L (international), and mmol/L. Reference ranges by age and sex included.

Convert Unit Conversion

Hematocrit Converter

Convert hematocrit between percentage (%), proportion (L/L), and hemoglobin equivalents. Includes reference ranges by age and sex.

Convert Unit Conversion

Iron Intake Reference Tool

Reference daily iron intake by age, sex, and life stage (pregnancy, lactation). Based on NIH ODS and WHO guidelines. Includes heme vs non-heme iron sources.

View Reference NIH/WHO

Protein Calculator

Calculate daily protein needs based on weight, activity level, and goals (maintenance, muscle gain, weight loss). RDA: 0.8 g/kg; active: 1.2-2.2 g/kg.

Calculate Protein RDA/Activity

General Nutrition Calculator

Estimate daily calorie, macronutrient, and micronutrient needs based on age, sex, weight, height, and activity level. Includes water intake.

Calculate Full Nutrition