Pregnancy Due Date Calculator
Enter the first day of your last menstrual period to calculate your estimated due date and current gestational week.
100% client-side · no upload
Estimated Due Date
Trimester Milestones
How to use
- Enter the date of the first day of your last menstrual period.
- Click Calculate Due Date to see your estimated due date.
- The tool also shows trimester milestone dates for your reference.
Related health tools
- Ovulation Calculator — find your fertile window
- Water Intake Calculator — hydration needs during pregnancy
- BMR Calculator — calorie needs increase during pregnancy
- Macro Split Calculator — nutrition planning
常见问题
- Is this due date calculator free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.