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.

Pregnancy-Specific Notice

Pregnancy calculator results are estimates only and do not replace prenatal care. Do not use for aggressive weight-loss targets during pregnancy. For multiple pregnancies, there is no universal calorie formula — consult your obstetrician. All weight gain and calorie recommendations are based on IOM/ACOG guidelines for singleton pregnancies.

7 Evidence-Based Tools

Pregnancy Calculators

Specialized calculators for pregnancy planning and tracking. All tools reference ACOG (American College of Obstetricians and Gynecologists) and IOM (Institute of Medicine) guidelines. No personal data is stored.

Pregnancy Due Date Calculator

Calculate estimated due date from last menstrual period (LMP), conception date, or IVF transfer date. Uses Naegele's rule with cycle length adjustment.

Open Calculator LMP, Conception & IVF Methods

Pregnancy Weight Gain Calculator

Get personalized weekly weight gain targets based on pre-pregnancy BMI using IOM 2009 guidelines. Includes twin pregnancy adjustments and weekly tracking.

Open Calculator IOM 2009 Guidelines

Pregnancy Calorie Calculator

Calculate daily calorie needs during pregnancy based on pre-pregnancy weight, height, age, activity level, and current trimester. Includes macronutrient distribution.

Open Calculator Trimester-Specific

Gestational Age Calculator

Calculate current gestational age in weeks and days from LMP, due date, or ultrasound date. Includes fetal development milestones by week.

Open Calculator Fetal Milestones

Trimester Calculator

Determine current trimester, start/end dates, and key milestones. Shows week ranges: 1st (1-13), 2nd (14-27), 3rd (28-40+).

Open Calculator Milestone Tracking

Pre-Pregnancy BMI Calculator

Calculate BMI before conception to determine recommended weight gain range and calorie needs. Includes WHO and IOM category classifications.

Open Calculator WHO/IOM Categories

Pregnancy Calorie Needs by Trimester

Detailed breakdown of calorie and macronutrient needs for each trimester based on pre-pregnancy metrics and activity level. Includes micronutrient highlights.

Open Calculator Micronutrient Guide