Inputs used in this example
First day of last period2026-01-01
Example calculation
Pregnancy Due Date Calculator basic example
Start with the listed values, check the calculated result, and then change the relevant input to compare another pregnancy due date calculator scenario.
Estimated result
Estimated due date
October 8, 2026
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Why this example matters
The result for pregnancy due date calculator uses the inputs shown above. Change one value at a time to see which assumption makes the biggest difference.
Before using the estimate to make a decision, check whether fees, units, timing, or other real-world conditions fall outside this calculation.