Ovulation & Period Calculator
Calculate your ovulation date, fertile window, and next period with a 3-month calendar view.
Ovulation & Period Calculator
Track your cycle, find your fertile window, and predict your next period with a 3-month calendar view.
📅Your Cycle Info
✨Your Cycle Predictions
📆3-Month Calendar View
March 2026
April 2026
May 2026
💡Cycle Health Guide
🌸 Understanding Your Cycle
A typical menstrual cycle ranges from 21 to 35 days, with 28 days being average. Your cycle starts on the first day of your period.
Follicular phase (Days 1–13): Your body prepares an egg. Estrogen rises, building the uterine lining.
Ovulation (Day 14 avg): A mature egg is released. This is your peak fertile day.
Luteal phase (Days 15–28): If the egg isn't fertilized, progesterone drops and your period begins.
🥚 Your Fertile Window
You're most likely to conceive during the 6 fertile days before and including ovulation.
Sperm can survive in the reproductive tract for up to 5 days, while an egg only survives 12–24 hours after ovulation.
Signs of ovulation include: clear egg-white cervical mucus, a slight rise in basal body temperature (+0.2°C), and mild pelvic cramping (mittelschmerz).
💡 Tip: LH ovulation tests can confirm ovulation 24–36 hours before it happens, improving timing accuracy.
📊 Signs of a Healthy Cycle
- ✓ Regular cycle length (consistent ±2 days each month)
- ✓ Period lasts 3–7 days
- ✓ Moderate flow — not too heavy or too light
- ✓ Manageable cramps (not debilitating)
- ✓ No spotting between periods
- ! See a doctor if cycles are consistently under 21 or over 35 days
📱 Tracking Tips
- → Record the first day of each period for at least 3 months to establish your baseline cycle length.
- → Basal body temperature (BBT) charting: take your temp every morning before getting up.
- → Stress, illness, travel, and major weight changes can delay or skip ovulation.
- → This calculator is for regular cycles. Consult your doctor for PCOS, irregular cycles, or fertility concerns.
⚕️ This calculator provides estimates based on average cycle data and is for informational purposes only. It is not a substitute for medical advice. Consult a healthcare professional for fertility planning or medical concerns.