Pregnancy Due Date Calculator
Estimate your due date and track key pregnancy milestones
// Naegele's Rule
The standard method: add 280 days (40 weeks) to the first day of your last menstrual period. Only ~5% of babies arrive on the exact due date — most come within 2 weeks either side.
// IVF Dating
For IVF pregnancies, the due date is calculated from the transfer date, adjusted for embryo age. Day 5 transfers are 2 days further along than Day 3 at the time of transfer.
// Trimester Guide
1st (wk 1-12): organs form, morning sickness common. 2nd (wk 13-26): baby grows, energy returns. 3rd (wk 27-40): rapid growth, preparation for birth.
// Key Milestones
Week 12: first scan. Week 20: anatomy scan. Week 24: viability milestone. Week 37: full term. Your healthcare provider may adjust dates based on ultrasound measurements.
// How to Use Online Pregnancy Due Date Calculator
- Enter or paste your source data into the tool input.
- Click the primary action button to run Online Pregnancy Due Date Calculator.
- Review the output, then copy or export your result.
// FAQ: What does Online Pregnancy Due Date Calculator do?
Online Pregnancy Due Date Calculator helps you estimate your due date and track key pregnancy milestones in your browser with instant results.
// FAQ: How do I use Online Pregnancy Due Date Calculator?
Paste or type your input, choose the needed action, and copy the generated output when the result is ready.
// FAQ: Is my data safe when using Online Pregnancy Due Date Calculator?
Yes. Processing runs in your browser session for this page, so your content is not uploaded by this tool workflow.
// FAQ: Can I use Online Pregnancy Due Date Calculator on mobile devices?
Yes. Online Pregnancy Due Date Calculator works on modern mobile browsers, so you can run it from phones and tablets.