Pregnancy
Quick answer
Use a reliable last-period date and regular cycle length, or enter the estimated date supplied by your care team. Dates can be entered in Gregorian or Solar Hijri calendars.
Education and record keeping only. Follow your maternity team's individual advice. For urgent symptoms, seek medical care; do not wait for this tool.
Choose your details to see an educational estimate and its limitations. This tool cannot assess your pregnancy or replace your care team.
Last-period dating adds 280 days and adjusts by the difference between your usual cycle and 28 days. A care-team due date is used directly. Gestational age is estimated relative to your device's local calendar date, using UTC calendar-day arithmetic.
Method checked: 26 October 2026. No independent clinical review is claimed.
Not suitable for IVF dating. Irregular cycles or uncertain period dates need clinical dating. A due date does not confirm pregnancy, predict the exact birth date or assess whether it is safe to wait.
Last-period dating adds 280 days and adjusts by the difference between your usual cycle and 28 days. A care-team due date is used directly. Gestational age is estimated relative to your device's local calendar date, using UTC calendar-day arithmetic.
Not suitable for IVF dating. Irregular cycles or uncertain period dates need clinical dating. A due date does not confirm pregnancy, predict the exact birth date or assess whether it is safe to wait.
Education and record keeping only. Follow your maternity team's individual advice. For urgent symptoms, seek medical care; do not wait for this tool.
A practical guide to pregnancy dates, energy estimates, weight references, protein planning and blood sugar records, with worked examples and clear limits.
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