Pregnancy Calculator

Calculate your pregnancy due date, current week, and trimester timeline with this accurate online tool.

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About This Tool

This comprehensive pregnancy calculator helps you estimate your due date, current week of pregnancy, and trimester breakdown. Simply enter your last menstrual period (LMP) date or conception date, along with your average cycle length, to get detailed results including due date, current pregnancy week and day, trimester information, and a visual timeline. The tool uses standard medical calculation methods (Naegele's rule) for accurate results.

Save your calculation history with a free account

How to Use

Enter the first day of your last menstrual period (LMP) using the date picker.
(Optional) Adjust your average cycle length if different from 28 days.
Select your preferred calculation method (LMP-based or conception date).
Click the 'Calculate Pregnancy Timeline' button.
View your due date, current pregnancy week, trimester breakdown, and timeline.

Frequently Asked Questions

Find Quick Answers

How accurate is this pregnancy calculator?

This calculator uses standard medical formulas (Naegele's rule) and is accurate for typical 28-day cycles. For irregular cycles or other factors, consult your healthcare provider.

What's the difference between LMP-based and conception date calculations?

LMP-based calculation estimates due date from the first day of your last period. Conception date calculation uses the actual conception date. Most healthcare providers use LMP-based calculation as it's more commonly known.

Can I use this calculator if I have irregular cycles?

Yes, but you should adjust the cycle length input to match your average. For best accuracy with irregular cycles, consult your doctor who may use ultrasound dating.

What information will I get from the results?

You'll receive your estimated due date, current pregnancy week and day, which trimester you're in, and a visual timeline showing key pregnancy milestones.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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