The Pregnancy Due Date Calculator estimates when your baby is due using Naegele's rule, based on the first day of your last period and your cycle length. It also shows your current gestational age, trimester and estimated conception date.
Estimating your due date
The standard estimate adds 280 days (40 weeks) to the first day of your last menstrual period, adjusted for cycle length. From that, the calculator works out how far along you are now and which trimester you're in.
It's a helpful estimate, but an early dating ultrasound from your provider is the most accurate.
Shows
- Estimated due date and days remaining
- Current gestational age in weeks and days
- Estimated conception date and trimester
Related searches
Recommended Health & Lifestyle tools
Explore more free online tools related to Pregnancy Due Date Calculator.
Ovulation Calculator
Find your most fertile days and estimated ovulation date from your last period and cycle length.
Budget Planner
Plan a monthly budget by income and categories, see what's left to allocate, and have it saved in your browser.
Expense Tracker
Log expenses by category and date, see your total and per-category breakdown, all saved privately in your browser.
BMI Calculator
Calculate your Body Mass Index from height and weight in metric or imperial units, with your category and healthy range.
BMR Calculator
Calculate your Basal Metabolic Rate with the Mifflin-St Jeor equation and estimate daily calorie needs by activity level.
Calorie / Macro Calculator
Get a daily calorie target for your goal and a protein, carb and fat breakdown based on your chosen macro split.