Free Online Period Tracker & Calculator
Track your menstrual cycle, predict your next period, and know your fertile days instantly. 100% free, no sign-up required, completely private.
Track Your Journey
Your details stay private on this device.
Your Calendar
A clear view of the month ahead.
How It Works?
Track menstrual cycle in 3 simple steps. No app download, no registration required - just instant, accurate predictions.
Enter Your Last Period
Simply select the start date of your last menstrual period. That's all we need to get started!
Instant Calculations
Our smart algorithm instantly calculates your cycle patterns based on medical averages and input.
Get Your Predictions
View next period tracker dates, ovulation window, fertile days, and PMS timing - all in one place!
Start Your Journey in 2 Minutes
Everything you need to know about tracking cycle, getting reminders, and staying in control.
Quick Start tracker - No Sign Up Needed!
Why Sign In? Unlock These Benefits!
Access from Any Device
Phone, tablet, computer - Tracker cycle data follows you everywhere.
Never Miss Your Period
Get gentle email reminders before your period and ovulation days.
Your Data, Always Safe
Secure cloud backup means you'll never lose Cycle history.
Super Simple Sign In - No Password Needed!
Click 'Sign In'
Enter Your Email
Check Your Inbox
Enter the Code
You're In!
Set Personal Reminders
Period Reminder
Get notified before your period starts
Ovulation Reminder
Know your fertile window in advance
Keep a Record. See the Pattern.
Log each period in your dashboard — date, flow, symptoms, mood. The more you track, the more accurate your predictions become.
Log Your Period
Pick the start date, how many days it lasted, and you're done. Takes about 10 seconds.
Add Details (Optional)
Flow level, cramps, mood, headaches — tap a few buttons if you want. Skip it if you don't.
Watch It Get Smarter
After a few months, your dashboard shows real trends — not guesses. Your data, your patterns.
How is this different from the calculator above?
Quick estimate based on one date and an average cycle length. Good for a rough idea.
Learns from every period you record. The more months you log, the better it knows your cycle.
Loved by Women Everywhere
Join over 50,000+ women who trust our period tracker to stay in control of their health.
"I just started tracking my periods and this free period tracker is so simple! No confusing apps to download, just pick a date and boom - I know when to be prepared. Love it!"
Sarah
"The ovulation prediction is incredibly accurate! We've been trying to conceive and this fertility tracking tool has been a game-changer. So grateful it's completely free!"
Maria
"As a busy consultant, the email reminders are a lifesaver! I travel constantly and having my period calendar online means I can check it anywhere. No more surprises during meetings!"
Jessica
"My periods have always been irregular, but this menstrual cycle tracker helps me see patterns I never noticed before. The personalized settings make it work perfectly for my unique cycle."
Priya
"Finally, a period tracker app that respects my privacy! No forced registration, no selling my data. I can use it without signing up, or sign in with just my email. Perfect!"
Emma
"Perfect for my teenage daughter! She was nervous about tracking, but this best period tracker is so simple and private. Now she feels confident and prepared. Thank you for making it free!"
Linda
Free Period & Fertility Calculators
Accurate, free tools for every stage of your cycle — no signup required.
Period Calculator
Calculate your next period date in seconds. Enter your last menstrual period start date, hit calculate, done.Ovulation Calculator
Find your ovulation date and 6-day fertile window in seconds.Fertility Calculator
See your fertile window and peak days to get pregnant.Period Cycle Phases
See exactly which phase you're in today and what's coming next.Follicular Phase Calculator
See your follicular phase dates, symptoms, and what to eat for optimal energy.Period Calculator for Irregular Periods
Estimate your next period and fertile window, even with irregular cycles.Monthly Period Cycle Calculator
Calculate your monthly period cycle and predict your next period date in seconds.Ovulation Day Calculator
Find your exact ovulation day and peak fertility window based on your cycle data.Safe Days Calculator
Calculate your safe days and unsafe days based on your menstrual cycle.Pregnancy Calorie Calculator
Find out exactly how many calories you need each day during pregnancy.Accurate Period Calculator - Predict Your Next Period Free
Predict your next period date with pinpoint accuracy, based on your actual cycle length.Period Cycle Calculator
Predict your next period date and understand your menstrual cycle in seconds.Period Cycle Length Calculator
Calculate your average period cycle length using your last few periods.Menstrual Cycle Calculator
Predict your next period and menstrual cycle dates in seconds.Period Phase Calculator
Find out which phase of your menstrual cycle you're in right now.Ovulation After Miscarriage Calculator
Estimate ovulation and your fertile window after miscarriage using your first real period date and average cycle length.Implantation Calculator
Estimate your implantation date and earliest pregnancy test window in seconds.IVF Due Date Calculator
Estimate your due date, current pregnancy week, and key milestones from your embryo transfer date and embryo age.Period Tracker FAQ
Everything about this free online period tracker, menstrual cycle calculator, and ovulation tracking tool.