Baby Due Date Calculator
Estimate your baby's due date from the first day of your last menstrual period (LMP). Based on the standard 280-day gestation.
How to Use the Due Date Calculator
- Enter the year, month, and day of the first day of your last menstrual period.
- Click Calculate to see the estimated due date and trimester milestones.
- Discuss the result with your healthcare provider for personalised guidance.
Referência Rápida
| De | Para |
|---|---|
| Trimester 1 | Weeks 1–12 |
| Trimester 2 | Weeks 13–27 |
| Trimester 3 | Weeks 28–40 |
| Full-term | 37–42 weeks |
| Average gestation | 280 days (40 weeks) |
Casos de Uso
- •Planning prenatal appointments and screenings.
- •Estimating trimester milestones for pregnancy tracking.
- •Preparing for maternity leave timing.
Fórmula
Due date = LMP + 280 days (40 weeks). Trimester 1 ends at week 12, Trimester 2 at week 27.
Perguntas Frequentes
How accurate is this due date?
Only about 5% of babies arrive on the exact due date. It is an estimate; most births occur within ±2 weeks.
What if my cycle is not 28 days?
This calculator assumes a 28-day cycle. For longer or shorter cycles, consult your healthcare provider.
Is this calculator free?
Yes, all OhMyCalc tools are completely free.