Pregnancy Due Date Calculator
About Pregnancy Due Date Calculator
The due date calculator gives a basic estimate from the first day of the last menstrual period and cycle length. It is informational and not medical advice.
How to Use
The due date calculator gives a basic estimate from the first day of the last menstrual period and cycle length. It is informational and not medical advice.
- Open the calculator : Use Pregnancy Due Date Calculator from the Health category.
- Check the inputs : Review the required values and any optional settings.
- Read the formula : Use the formula and notes below to understand how the result is produced.
Common Questions
What does the Pregnancy Due Date Calculator estimate?
It estimates a due date from your chosen pregnancy timing input.
How accurate is the result?
This is an informational estimate based on a typical pregnancy timeline, not a medical diagnosis or guarantee.
Inputs
- Last period date
- Cycle length
Outputs
- Estimated due date
- Estimated conception window start
- Estimated conception window end
Formula
Estimated due date = last period date + 280 days + cycle length adjustment.