Pregnancy Due Date Calculator.

Estimate your due date, explore trimester milestones, and plan prenatal care with support for LMP, conception, IVF, and ultrasound dating.

Pregnancy Due Date Calculator

Choose a conception method and we’ll estimate your baby’s due date, trimester milestones, and current gestational age.

Expecting multiples

Adjust due date for twin/multiple pregnancy (typical delivery two weeks earlier).

Your pregnancy timeline

Personalized schedule based on the selected method.

Estimated due date

—

Singleton standard

Current gestational age

—

Key trimester thresholds

  • • First Trimester: 0–13 weeks
  • • Second Trimester: 14–27 weeks
  • • Third Trimester: 28–40 weeks

• Schedule the first prenatal visit around 8–10 weeks gestation.

• Begin prenatal vitamins with folic acid (400–800 mcg) as early as possible.

• Discuss genetic screening, vaccination timing, and lifestyle updates with your healthcare provider.

Use cases

Real-world uses.

Family Planning & Announcements
Determine the best time to share the news, schedule maternity photos, and plan parental leave around trimester milestones.
Prenatal Appointment Prep
Bring the timeline to your OB visits to discuss screenings, ultrasounds, and immunizations at the appropriate weeks.
Travel & Lifestyle Planning
Align babymoon travel, work trips, or relocation with trimester comfort zones and airline guidelines.
Birth Plan & Nursery Timeline
Use milestone projections to time childbirth classes, hospital registration, and nursery setup.
IVF & Fertility Journey Tracking
Convert embryo transfer dates to estimated due dates for IVF, IUI, or fertility preservation journeys.
Healthcare Team Coordination
Share the concise summary with doulas, partners, or caregivers so everyone understands the pregnancy timeline.

How it works

Four steps.

  1. 01

    Select the method used to date the pregnancy (LMP, conception, IVF transfer, or ultrasound).

  2. 02

    Enter the relevant date, cycle length, embryo stage, or ultrasound gestational age to personalize the calculation.

  3. 03

    Review the estimated due date, current gestational age, and milestone appointments.

  4. 04

    Copy the summary or follow the trimester tips and checklists to stay organized throughout pregnancy.

Features

Tailored Pregnancy Planning Features.

From adjusting for cycle length to supporting IVF embryo transfers, our calculator helps you stay informed every week.

  • Multiple Calculation Methods

    Calculate due dates using last menstrual period, conception/insemination, IVF embryo transfer, or ultrasound dating.

  • Gestational Age & Milestones

    See current gestational age, trimester boundaries, and milestone appointments like anatomy scans and glucose screening.

  • Singleton & Multiples Support

    Toggle adjustments for twin or multiple pregnancies with earlier due date guidance and additional care reminders.

  • Prenatal Checklist

    Stay organized with prenatal visit timing, recommended screenings, vaccination windows, and wellness tips.

  • Shareable Summary

    Copy a personalized pregnancy plan with due date, gestational age, and multiples status to share with family or caregivers.

  • Fetal Development Snapshot

    Learn what’s happening each trimester with curated developmental milestones from heartbeat to lung maturity.

FAQ

Questions.

Can't find an answer? Send us your question.

How accurate is the due date?

Due dates are estimates based on average gestational lengths. Most babies arrive between 37 and 41 weeks. IVF and ultrasound dating can be more precise, but always follow guidance from your obstetric provider.

What if my cycles are irregular?

Use the cycle length field when calculating from LMP to compensate for shorter or longer cycles. If cycles are highly irregular, conception or ultrasound dating may be more reliable.

Can I use this for twin or multiple pregnancies?

Yes. Toggle the multiples option to shift the estimated due date about two weeks earlier, reflecting typical twin delivery timing. Your provider will give the most accurate schedule.

How do IVF transfers differ?

Use the IVF method and select the embryo stage (day 3 or day 5). The calculator adjusts the timeline automatically using standard ASRM guidance.

When should I schedule my first prenatal visit?

Most obstetricians schedule the first visit around 8–10 weeks gestation. Contact your provider earlier if you experience concerning symptoms or have a high-risk history.

Are the milestone reminders medical advice?

No. They are educational prompts. Always consult your OB/GYN or midwife for customized prenatal care recommendations.

Related tools

More Utilities tools.

All 114 Utilities tools →

Built by Infyways

Need more than a tool.

These utilities are made by the Infyways studio. When a free tool is not enough, we build the real thing.