Ovulation Calculator

Calculate your ovulation date and fertile window for family planning

Calculate Ovulation Fertility Guide

Calculate Your Fertile Window

Enter your cycle details to predict your most fertile days

First day of your last period
If you know your luteal phase length

Understanding Your Fertility Cycle

Menstruation

Days 1-7
Period bleeding

Follicular Phase

Days 1-13
Egg develops

Ovulation

Day 14
Egg released

Luteal Phase

Days 15-28
After ovulation

Signs of Ovulation

Physical Signs
  • Slight rise in basal body temperature
  • Changes in cervical mucus (clear, stretchy)
  • Soft, high, open cervix
  • Light spotting or discharge
  • Breast tenderness
Other Symptoms
  • Increased sex drive
  • Mild pelvic or abdominal pain
  • Heightened sense of smell
  • Mood changes
  • Increased energy
Important Disclaimer

This calculator provides estimates based on average cycle data. Every woman's cycle is unique, and ovulation can vary. For precise fertility tracking, consider using ovulation predictor kits, tracking basal body temperature, or consulting with a healthcare provider. This tool is for educational purposes and should not be used as the sole method of contraception.