Inputs: LMP (YYYY-MM-DD), optional cycle length (20β45), optional βAs ofβ date (defaults to today UTC).
Reality check: Ultrasound dating may refine EDD. This tool is an estimate, not medical advice.
Edge cases & notes
LMP after the βAs ofβ date is treated as an input error to avoid negative gestational ages.
All calculations are calendar-accurate using PHP DateTimeImmutable in UTC.
Weeks/days until (or past) EDD use exact day counts (no average month assumptions).
Cookies & privacy
Utilities Bunker uses necessary cookies to run the site. Optional cookies help remember preferences,
measure usage, and improve the platform. You can change your choices any time.
Privacy Policy.