Pregnancy Due Date Calculator

Work out your baby's due date from the first day of your last period, and see how many weeks pregnant you are today.

Loading tool…

More Health Tools

Measure your Body Mass Index (BMI) in seconds. BMI is a quick screening number…

Discover your daily calorie needs based on your age, sex, height, weight and activit…

Learn how much water you should drink each day, in litres and glasses, based on y…

Work out your Basal Metabolic Rate (BMR) — the calories your body burns at comp…

Measure your Total Daily Energy Expenditure (TDEE) — the total calories you bu…

See your daily protein, carbohydrate and fat targets in grams, balanced for your…

How is my due date worked out?

The standard estimate (Naegele's rule) counts 280 days (40 weeks) forward from the first day of your last menstrual period.