Pregnancy Due Date Calculator

Estimate a due date from the first day of your last period (Naegele\u2019s rule). This is an estimate only; your provider will confirm.

First day of last period

Estimated due date

—

Current stage—

Estimate only. Always confirm with your healthcare provider.

✉ Email me this result

</> Embed this calculator

Paste this into any website or blog post. It is free — the small "powered by" link must stay visible.

<iframe src="https://calculatorspoint.net/embed/pregnancy-due-date-calculator/" style="width:100%;max-width:640px;height:560px;border:1px solid #e3e8ef;border-radius:12px;" loading="lazy" title="Pregnancy Due Date Calculator"></iframe>

Sources & methodology

Last reviewed January 15, 2026.

Method: Estimated due date = last menstrual period + 280 days (Naegele's rule), adjustable for cycle length and conception/IVF dates.

ACOG — Methods for estimating the due date

How it works

Due date = last period + 280 days

Frequently Asked Questions

How does the Pregnancy Due Date Calculator work?

Estimate a due date from the first day of your last period (Naegele\u2019s rule). This is an estimate only; your provider will confirm.

Is this medical advice?

No. It gives general estimates only. For decisions about your health, speak with a qualified professional.