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Due Date Calculator

Calculate your estimated due date from LMP or conception date.

LMP MethodConception Date

Last Period Date

📅 MyCalendarTools — countdown to your due date

About this tool

Calculate your estimated due date from LMP or conception date. This tool gives a general estimate based on standard health formulas — it's a starting point for understanding your numbers, not a diagnosis or medical advice.

How to use it

Enter your details into the fields above — the calculator updates instantly as you type.
Double-check units (metric or imperial) match what you're entering.
Press calculate to see your result and any relevant health ranges.
Re-run with different numbers to see how changes affect the outcome.

Common use cases

Getting a quick estimate before a doctor's appointment.
Tracking changes over time as your circumstances change.
Understanding what a result actually means in practical terms.
Comparing your numbers against general health guidelines.

About this calculator

Calculate your baby The Due Date Calculator page explains what the tool or support page provides, what information is needed and how to use the result or guidance for an everyday task.

Use Due Date Calculator when you need a quick answer without creating an account, downloading an app or sending your information to a third party. The tool is designed for everyday planning, comparison and checking, with results shown in the browser as soon as you enter the details.

How to use Due Date Calculator

Enter the dates, numbers or options requested by the form on this page.

Choose any unit, country, time period or setting that applies to your situation.

Press the calculate or generate button to show the result.

Review the explanation beside the result before relying on it for planning.

When this page is useful

Due Date Calculator is useful for quick checks, household planning, school or work tasks, content planning and comparing simple scenarios. Many visitors use these tools to avoid manual counting or spreadsheet setup for a one-off question.

The result should be treated as a practical guide rather than professional advice. For legal, financial, health, tax, pregnancy, school holiday, tide or public holiday decisions, confirm important details with an official source or qualified professional.

Privacy and accuracy

MyCalcTools tools run in your browser wherever possible. We aim to keep pages clear, lightweight and easy to read on mobile, tablet and desktop. If a page uses dates, public holidays or calendar rules, those rules can change over time, so checking the final result against the relevant authority is recommended for high-stakes decisions.