Pregnancy Due Date Calculator
Calculate your estimated due date from your LMP or conception date, plus week, trimester, and milestones.
Open calculatorPregnancy calculators built for clear, quick answers.
BumpCalc gives you practical pregnancy date estimates based on standard obstetric formulas. Use our calculators to check your estimated due date, current week and trimester, and likely conception timing. All tools run directly in your browser.
Pregnancy calculators
Pregnancy Week Calculator
Find your exact pregnancy week and day, trimester, and a fruit-size comparison for your baby.
Open calculatorConception Date Calculator
Enter your due date to estimate your likely conception date and conception window.
Open calculatorHow these calculations work
The due date and week estimates are based on a 280-day pregnancy from the first day of your last menstrual period, or 266 days from conception. These are common medical estimation models and may be adjusted by your clinician based on ultrasound findings and cycle history.
BumpCalc is for educational planning and tracking. For personalized guidance, confirm dating and milestones with your prenatal care provider.