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Calculate pregnancy due date based on last period or conception date
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Tool usage guide
The Due Date Calculator provides a quick and accurate estimate of your expected delivery date based on standard medical pregnancy timelines. By inputting the first day of your last menstrual period or your known conception date, you can easily track your pregnancy progress and prepare for upcoming milestones.
Background
An expectant mother wants to know when her baby is due to start planning her leave from work.
Problem
She knows the first day of her last period was January 1st, 2024, but is unsure how to calculate the 40-week mark.
How to use
Select 'First Day of Last Period' and enter '2024-01-01'.
calculationMethod: last-period, lastPeriodDate: 2024-01-01Outcome
The calculator provides the estimated due date of October 8th, 2024.
Background
A patient who underwent IVF knows the exact date of embryo transfer and conception.
Problem
She needs a more precise due date calculation based on the known conception date rather than the last period.
How to use
Select 'Conception Date' and enter the specific date of conception.
calculationMethod: conception, conceptionDate: 2024-02-15This tool provides an estimate based on standard 40-week pregnancy cycles. Only a healthcare provider can confirm an exact due date via ultrasound.
The first day of your last period is the standard medical method. Use the conception date only if you are certain of the exact day fertilization occurred.
The calculator assumes a standard 28-day cycle. If your cycles are irregular, your doctor may adjust the due date based on clinical examination.
No, this tool processes your input locally and does not store or share your personal health information.
No. Only about 5% of babies are born exactly on their estimated due date; it is intended as a guide for prenatal care.
Health
Calculate possible blood types for parents and children based on genetics
Outcome
The calculator determines the estimated due date based on the 266-day gestation period from conception.