Health Canada Pregnancy Calculator

How to Use This Calculator

To use the Health Canada Pregnancy Calculator:

1. Enter your last menstrual period (LMP) date or estimated conception date
2. Select the calculation method (LMP or conception date)
3. Click "Calculate" to see your pregnancy metrics
4. Review the results and use them for planning and tracking

The calculator provides estimated due date, current gestational age, and weeks until delivery. For most accurate results, use your confirmed LMP date from your healthcare provider.

Formula Used

The calculator uses the following standard pregnancy calculation:

Gestational age is calculated as the number of weeks and days since the LMP date or conception date, whichever method you choose.

Interpreting Results

The calculator provides three key metrics:

• Estimated Due Date: The expected delivery date based on your input
• Current Gestational Age: How far along your pregnancy is in weeks and days
• Weeks Until Delivery: How many weeks remain until your estimated due date

These estimates are based on average pregnancy lengths and may vary. Always consult with your healthcare provider for personalized medical advice.

Worked Example

Example calculation using LMP date:

If your last menstrual period was on January 1, 2023:

• Due Date = January 1, 2023 + 280 days = October 28, 2023
• Current Gestational Age (as of April 1, 2023) = 12 weeks and 3 days
• Weeks Until Delivery = 28 weeks and 4 days

This example shows the pregnancy timeline based on standard calculations. Actual pregnancy lengths may vary.