Free Tools

Pregnancy Tools & Calculators

Free calculators to help you understand your cycle, estimate ovulation, and know the best time to take a pregnancy test.

Pregnancy Test Line Progression Checker

Upload and compare your pregnancy test photos side-by-side to track line progression over time (e.g. 8 DPO to 12 DPO).

Plan your next retest date after a faint line or negative. Get a 48-hour schedule with DPO tracking and calendar export.

Find the earliest and most accurate day to take a pregnancy test based on your last period and cycle length.

Calculate exactly how many days past ovulation you are today based on your cycle data.

Estimate your implantation window and understand when a pregnancy test could first turn positive.

Track expected hCG doubling times and understand what your levels mean at each stage of early pregnancy.

Calculate your estimated due date from your last menstrual period or known conception date.

Predict your ovulation date and fertile window to find the best days to conceive.

Enter your OPK readings and cycle length to predict your LH surge peak and see your LH curve.

Find the days in your cycle when you are most likely to get pregnant, with conception probability by day.

Find out how many weeks pregnant you are, which trimester you are in, and track upcoming milestones.

Predict your next period, ovulation date, and fertile window based on your last period and cycle length.