Calculate Your Cycle

How It Works

Enter Your Last Period Date

Select the first day of your most recent menstrual period to start tracking your cycle.

Set Your Cycle Length

Most women have cycles between 21-35 days. The average is 28 days, but yours may be different.

Get Accurate Predictions

Receive predictions for your next period, fertile window, ovulation date, and safe days.

Medical Disclaimer: This tool provides estimates only. Always consult with a healthcare provider for medical advice and concerns.

Understanding Your Menstrual Cycle

Menstrual Phase (Days 1-5)

The lining of the uterus sheds, resulting in menstrual bleeding.

Duration: 3-7 days typically
Hormone levels are lowest

Follicular Phase (Days 1-13)

FSH stimulates ovaries to prepare an egg. Estrogen levels rise.

Overlaps with menstrual phase
Energy levels increase

Ovulation (Day 14)

Mature egg is released. Most fertile time of cycle.

Around day 14 of 28-day cycle
Clear cervical mucus

Luteal Phase (Days 15-28)

Progesterone rises to prepare uterus for pregnancy.

Lasts about 14 days
May experience PMS symptoms

Fertility Window & Conception

Fertile Window

The 6-day period ending on ovulation day when pregnancy is most likely to occur.

Ovulation Day

The day when the egg is released. Highest chance of conception within 24 hours.

Safe Period

Days when pregnancy is less likely, but not guaranteed safe for contraception.

Menstrual Health Tips

Nutrition

Eat iron-rich foods
Include calcium & magnesium
Stay hydrated

Exercise

Light exercise reduces cramps
Yoga helps with pain
Regular activity regulates cycles

Self-Care

Get adequate sleep
Use heat therapy
Practice stress management

When to Consult a Healthcare Provider

Irregular Cycles:

Cycles shorter than 21 or longer than 35 days

Heavy Bleeding:

Changing pads/tampons every hour

Severe Pain:

Pain interfering with daily activities

Missed Periods:

Missing periods for 3+ months

Period Calculator