Pregnancy Due Date Calculator

Estimate your pregnancy due date and current week from the first day of your last menstrual period (LMP), using the standard 280-day method.

Estimated due date
Along now

Fertile window? Ovulation calculator · baby's age later: Age calculator · event countdown: Event countdown.

How to use

Enter the first day of your last menstrual period. The tool estimates your due date, how many weeks along you are today, and a timeline of key milestones at weeks 12, 20, 28, 36 and 40. Copy or download the report to share with your care team.

FAQ

What can I use Pregnancy Due Date Calculator for?

Pregnancy Due Date Calculator is useful when you need to estimate your pregnancy due date and current week from the first day of your last menstrual period (LMP), using the standard 280-day method. It is meant for quick checks, everyday workflows and practical tasks where a fast browser-based result is enough.

How do I use Pregnancy Due Date Calculator correctly?

Enter accurate body, time, activity or goal values. The estimate is only as good as the measurements you provide.

What input does Pregnancy Due Date Calculator need?

Use the fields shown in the tool and keep the input close to the real case you want to solve. If the page includes examples or presets, start with those to understand the expected format.

What result does Pregnancy Due Date Calculator give me?

The tool returns health-related estimates, categories or target ranges based on the inputs shown on the page. In most cases the output updates instantly and can be copied, downloaded or used as a reference for your next step.

How accurate is Pregnancy Due Date Calculator?

Use the result as a practical reference, not as medical advice. Personal health decisions should be checked with a qualified professional.

Is my data uploaded when I use Pregnancy Due Date Calculator?

The tool is designed to run in your browser, so ordinary inputs are processed locally unless a page explicitly states that it needs an online lookup.

What common mistakes should I avoid with Pregnancy Due Date Calculator?

Avoid guessing measurements, mixing metric and imperial units, or treating an estimate as a diagnosis.

What related tasks can Pregnancy Due Date Calculator help with?

Pregnancy Due Date Calculator is intended for use cases related to "due date calculator" and nearby needs such as "pregnancy calculator". For best results, follow the labels, examples and options on the page.

What are the limits of Pregnancy Due Date Calculator?

It is a planning tool, not a professional advisor. Local rules, personal circumstances and real-world conditions can change the final answer.

When should I double-check the output from Pregnancy Due Date Calculator?

Double-check the output before changing health, diet, training or medication decisions.