Free calculators
Free menstrual cycle calculators to track ovulation, fertile days, cycle phases, and pregnancy. Easy-to-use tools for understanding your fertility and reproductive health.
Ovulation calculator
Estimate your ovulation date and fertile window based on your cycle length.
Phase calculator
Discover which phase of your cycle you're in today with personalized tips.
Due date calculator
Calculate your estimated due date based on your last period or conception date.
Implantation calculator
Estimate when implantation may occur after ovulation or conception.
Pregnancy test calculator
Find out the best time to take a pregnancy test for accurate results.
hCG calculator
Track your hCG levels and calculate doubling time during early pregnancy.
Your Privacy Matters
All calculations happen locally in your browser. We never collect, store, or transmit any of your personal health data. Your information stays on your device.