Period Tracker - Showcase Project

Period Tracker is a free website, and its calculator directory is the part most people find first. It holds 21 single-purpose tools for periods, fertility and pregnancy. You open one in any browser, type a date or two and get an answer straight away. There's nothing to install and no account to create. Calculator entries are kept in your browser instead of being sent to a server. Ten tools deal with periods and cycles. They predict your next start date, map the four cycle phases, show your follicular phase, average your last few cycle lengths and give a wider range when cycles are irregular. Eight deal with ovulation and fertility: an ovulation calculator, an ovulation day calculator, a fertility calculator, conception and implantation calculators, a safe days calculator, an ovulation after miscarriage calculator and a BBT chart for morning temperatures. The last three cover pregnancy. Due dates can be worked out from a last period, an ovulation or conception date or an ultrasound. The IVF due date calculator uses your embryo transfer date and embryo age. A pregnancy calorie calculator estimates how many calories you may need each day. each page explains its method in plain terms. Ovulation is estimated by counting back 14 days from your next expected period, and the fertile window is the five days before ovulation plus ovulation day itself. These numbers are estimates and not medical advice. Never use them as birth control. If you'd like the site to remember your cycles, a free account (email code or Google sign-in) adds history, sync across devices and email reminders.