Pregnancy Due Date Calculator
Calculate estimated due date using Naegele's rule — from last menstrual period (LMP), conception date, or IVF transfer. Plus all major pregnancy milestones (end of 1st trimester, anatomy scan, viability, full term).
What powers the Pregnancy Due Date Calculator
3 calculation methods: LMP, conception, IVF transfer
Adjustable cycle length (20-40 days)
Current week / day display
Current trimester identification
7 pregnancy milestones (end of 1st trim, anatomy scan, viability, end of 2nd trim, start of 3rd trim, full term, due date)
Why the Pregnancy Due Date Calculator is different
Browser-native
The Pregnancy Due Date Calculator runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Early pregnancy planning
- Knowing when prenatal milestones occur
- Sharing due date with family / employer
- Estimating trimester for travel / vaccine timing
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.