Ovulation Calculator

Track Your Ovulation & Fertile Days

Use this Ovulation Calculator to estimate your ovulation day and fertile window based on your menstrual cycle.

First day of your last period

September 2026

Your average cycle in days

29 Days

23 days29 days35 days

Length of your period

5 Days

4 days5 days6 days7 days

Disclaimer: This tool is for informational purposes only.
It is important to consult your doctor/gynaecologist

Fertility Rate

The Total Fertility Rate (TFR) in India has reached 1.93 according to recent national surveys. This reflects changing lifestyle dynamics and improved family planning awareness across the country.

India's Fertility Rate Over Time

Source: geofactbook.com

Fertility Context

The Total Fertility Rate (TFR) represents the average number of children a woman is expected to have during her reproductive years and serves as an important measure of fertility levels, population growth, and demographic trends.

Signs During Ovulation

Your body may give you subtle signs, such as

Doctor Q&As from Parents like you

i have periods on 1 St October want to know about my ovulation days

Dr. Pooja Mittal

Gynaecologist

Hi Sauleha Mushtaq, Your ovulation may happen on 14th October if you h...read more

my period occurred on July 3 after that August 22 after another period occurred on September 16 now today iam pregnent in october month ..please tell me my exact ovulation date and how many days pregnent iam .my beta hcg level is 149. 3

Dr. Pooja Mittal

Gynaecologist

Hi Asma Tabassum, In such irregular periods, it is not possible to tel...read more

My periods started on 16 oct. I want to know my ovulation period

Dr. Pooja Mittal

Gynaecologist

Hi Sonam Shinde, In a regular 28 day cycle, ovulation happens on day 1...read more

how to know ovulation date

Dr. Pooja Mittal

Gynaecologist

Hi Anita, Ovulation occurs 14 days prior to the onset of the next peri...read more

hi mam ,my period date is oct 1st when was to ovulation date .. my period cycle is 30 date. ???

Dr. Pooja Mittal

Gynaecologist

Hi SRI, Ovulation date would roughly be 16th October according to this...read more

Know More About Ovulation

Ovulation pain: Symptoms, causes, and pain relief

Shweta Das

Pregnancy3.8M

Can You Feel When An Egg Is Released? What Ovulation Pain Really Means

Zahirah

Pregnancy1.2M

Ovulation: What it is, Symptoms, Pain, How to track it, and More

Shweta Das

Pregnancy4.2M

Irregular Periods: Causes, Complications, Treatment, Pregnancy, and More

Shweta Das

Pregnancy4.6M

Ovulation 101: How To Know When You're Most Fertile

Zahirah

Pregnancy1.1M

Ectopic pregnancy: Symptoms, causes, risks, treatment, and more

Shweta Das

Pregnancy4.7M

Cramping During Early Pregnancy: What’s Normal, What’s Not, And When To Worry

Zahirah

Pregnancy1.3M

How to chart basal body temperature to predict ovulation

Shweta Das

Pregnancy4.1M

Pelvic Girdle Pain During Pregnancy: Is It A Cause Of Concern?

Zahirah

Pregnancy1.2M

Know More About The Ovulation Kit- Read More

Parentune Support

Pregnancy3.3M

Track your Pregnancy with Parentune

Due Date Calculator is an online tool to predict or know your baby's expected arrival, a moment of joy you await. To prepare with love, determine your special due date or weeks of pregnancy & track every step as you grow. Simply enter the first day of your last period and your average cycle length, and we'll estimate your due date along with exactly how far along you are today. From spotting each trimester's milestones to knowing when to expect your little one, this calculator helps you stay informed and prepared throughout your pregnancy journey.

Pregnancy

Due Date

Calculator

Select the first day of your last period

How long is your average cycle?

28 Days

Pregnancy Week by Week Guide

Pregnancy Week by Week is your friendly guide to the incredible journey happening within you, helping you cherish every stage as your baby grows. To stay connected with love, follow along as tiny fingers form, a heartbeat strengthens & your little one prepares to meet you. Simply select your current week and we'll walk you through exactly what's happening with your baby and your body right now. From the first flutter of movement to your baby's developing senses in the final trimester, this guide helps you understand each milestone and feel confident throughout your pregnancy journey.

Pregnancy Tracker

Your Baby, Week by Week

Select Week

1 2 3 4 5 6 7 8 9 10 11 12

Frequently asked Questions (FAQ's)

An ovulation calculator is a tool that estimates when you may ovulate and identifies the days when you are most likely to conceive. It uses information such as the first day of your last period and your average menstrual cycle length to estimate your fertile window.

An ovulation calculator estimates your ovulation date based on your menstrual cycle. Ovulation generally occurs about 14 days before your next period, although the timing can vary from person to person and from cycle to cycle. The calculator then estimates your fertile window around this time.

To estimate your ovulation date, enter the first day of your last period and your usual cycle length into the calculator. As a general guide, ovulation may occur around 14 days before your next period. For example, with a regular 28-day cycle, ovulation may occur around day 14.

Your fertile window is the few days leading up to ovulation and the day around ovulation. Sperm can survive in the reproductive tract for several days, while an egg remains viable for about 12 to 24 hours after ovulation. This means pregnancy is possible from sex in the days before ovulation as well as shortly after it.

If you are trying to conceive, having sex every day or every other day during the fertile window can help maximise your chances. You do not need to identify one exact hour or day. Timing sex across the fertile window can be a more practical approach.

You can use an ovulation calculator as a starting point, but its estimate may be less reliable when your cycles are irregular. If your periods are frequently unpredictable or you are unsure whether you are ovulating, speak with a gynaecologist. Irregular cycles can sometimes indicate that ovulation is not happening regularly.

Some people notice changes around ovulation, such as clear, slippery and stretchy cervical mucus, a slight rise in basal body temperature, mild pelvic discomfort or increased breast tenderness. Cervical mucus changes can be particularly useful for identifying the fertile period.

An ovulation calculator can provide a useful estimate when your menstrual cycles are reasonably regular, but it cannot predict ovulation with complete accuracy. Apps and calendar-based fertility tools have limitations, particularly when cycle length varies.

A calendar-based ovulation calculator should not be treated as a guaranteed method of contraception. Fertile days can vary between cycles, and predicting ovulation based only on dates can be inaccurate. If you want to prevent pregnancy, speak with a healthcare professional about reliable contraceptive options.

Consider speaking with a gynaecologist or fertility specialist if you have been trying to conceive for 12 months without pregnancy if you are under 35, or for 6 months if you are 35 or older. You may want to seek help sooner if your periods are very irregular, you know of a fertility-related condition, or you have other concerns about your reproductive health.