About Pregnancy Calculator

Pregnancy Calculator provides free calculators that estimate dates: a due date, how many weeks along a pregnancy is, when ovulation is likely, when a fertile window falls, and when a pregnancy test could give a meaningful result.

There is no account, no email capture and no newsletter. Open a page, enter your dates, get the answer.

Every calculator uses conventional planning figures: 280 days from the last menstrual period for a due date, 266 days from conception, a luteal phase of about 14 days for ovulation estimates, and a fertile window of five days before ovulation through one day after.

These are averages used by standard pregnancy wheels and cycle calculators. They are not personalised to you, and each page explains what its own numbers assume. The guides section works through the arithmetic in detail.

We do not claim medical accuracy, quote accuracy percentages, or present any result as a diagnosis. No calculator here identifies safe days, and none of them can be used as contraception.

We also do not ask for your data. Calculations run in your browser and the dates you enter are never transmitted or stored.

The calculators are free and are supported by advertising. Ads are kept out of the calculator forms and away from the buttons, so a mis-tap is never how this site makes money.

Pregnancy Calculator is built and maintained by KodeElite, a small software studio. It is a self-funded project rather than a clinic, a health service or a medical publisher, and it employs no clinicians.

That is the reason for the limits stated throughout: these pages explain arithmetic, and every one of them says where a question needs a healthcare professional instead. Questions and corrections reach a person at developer@kodeelite.com.

Pages are written to explain a calculation and its limits rather than to repeat keywords. Where a question needs a clinician rather than a calculator, the page says so.

Found something wrong or unclear? Tell us. Corrections are welcome.