Pregnancy Calculator Online – Calculate Due Date, Weeks & Pregnancy Milestones | DigiSadhan

Pregnancy Calculator

Pregnancy Calculator

Your estimated due date is:

Free Online Pregnancy Calculator

DigiSadhan’s Pregnancy Calculator is a free online tool that helps you estimate your pregnancy due date, gestational age, pregnancy week, trimester and remaining pregnancy days using the first day of your last menstrual period (LMP).

Pregnancy dating is commonly based on 40 weeks or 280 days from the first day of the LMP. The calculator provides a convenient estimate for planning and tracking, but it should not replace professional prenatal care or an ultrasound-based assessment.

The tool can be useful for:

What is a Pregnancy Calculator?

A Pregnancy Calculator is an online date calculator designed to estimate when a baby may be due and how far along a pregnancy may be.

The calculation generally uses the first day of the last menstrual period (LMP). Pregnancy is counted from the LMP, which means approximately two weeks are included before conception would normally occur.

The calculator can provide an estimate of:

How to Use the Pregnancy Calculator?

Using the calculator is simple.

Step 1: Enter Your LMP

Enter the first day of your last menstrual period.

Step 2: Calculate

Click the Calculate button.

Step 3: View Your Results

The calculator can estimate your:

For pregnancies where the LMP is uncertain or differs significantly from ultrasound dating, healthcare professionals may use ultrasound information to establish or confirm the estimated due date. ACOG identifies first-trimester ultrasound as the most accurate method for establishing or confirming gestational age.

Pregnancy Due Date Formula

The traditional calculation is based on an average pregnancy length of 280 days (40 weeks) from the first day of the LMP.

Basic Formula

Estimated Due Date = LMP Date + 280 Days

Or:

EDD = LMP + 40 Weeks

Example

If the first day of the LMP is:

January 1, 2026

Then:

January 1 + 280 days

≈ October 8, 2026

This is an estimated date, not a guaranteed delivery date.

Pregnancy Week Calculation Formula

Gestational age can be estimated by determining the number of days between the LMP and the reference date.

Formula

Gestational Age (Days) = Current Date − LMP Date

Then:

Pregnancy Weeks = Total Days ÷ 7

For example, if 70 days have passed:

70 ÷ 7

= 10 Weeks

Pregnancy is commonly described in weeks and days, such as 10 weeks + 2 days.

Trimester Calculation

Pregnancy is commonly divided into three trimesters:

These ranges are based on standard obstetric definitions.

Important Pregnancy Calculator Information

An estimated due date is a planning estimate, not an exact prediction of the day labor will begin. ACOG notes that only about 1 in 20 women give birth on their estimated due date, and many births occur before or after that date.

Menstrual-cycle length, irregular periods, uncertainty about the LMP, ovulation timing and other factors can affect LMP-based calculations. For this reason, your healthcare professional may use ultrasound and other clinical information when determining the best estimated due date.

Benefits of Using Our Pregnancy Calculator

Frequently Asked Questions

How is the pregnancy due date calculated?

The traditional method adds 280 days or 40 weeks to the first day of the last menstrual period.

What does LMP mean?

LMP means Last Menstrual Period. It refers to the first day of the most recent menstrual period before pregnancy.

Is the pregnancy calculator 100% accurate?

No. It provides an estimated due date. Your healthcare professional may confirm or revise dating using ultrasound and other clinical information.

How many weeks is a normal pregnancy?

A pregnancy is conventionally measured as approximately 40 weeks from the first day of the LMP.

When is ultrasound more useful for pregnancy dating?

ACOG states that ultrasound measurement during the first trimester is the most accurate method for establishing or confirming gestational age.

Can I use this calculator instead of prenatal care?

No. This calculator is intended for estimation and educational purposes. Regular prenatal care is important for monitoring the health of the pregnant person and fetus.

प्रेग्नेंसी कैलकुलेटर – गर्भावस्था की अवधि और ड्यू डेट की गणना करें

मुफ्त ऑनलाइन Pregnancy Calculator

DigiSadhan का Pregnancy Calculator एक मुफ्त ऑनलाइन टूल है जो Last Menstrual Period (LMP) के आधार पर अनुमानित Due Date, Pregnancy Week, Gestational Age, Trimester और Remaining Days की गणना करने में मदद करता है।

परंपरागत रूप से गर्भावस्था की गणना LMP के पहले दिन से 40 सप्ताह या 280 दिनों के आधार पर की जाती है।

Pregnancy Calculator का उपयोग कैसे करें?

  1. अपनी अंतिम माहवारी के पहले दिन की तारीख दर्ज करें।
  2. Calculate पर क्लिक करें।
  3. अनुमानित परिणाम देखें।

आपको प्राप्त हो सकता है:

गर्भावस्था की गणना का सूत्र

Due Date Formula

अनुमानित ड्यू डेट = LMP + 280 दिन

या:

LMP + 40 सप्ताह

उदाहरण

LMP:

1 जनवरी 2026

280 दिन जोड़ने पर:

लगभग 8 अक्टूबर 2026

यह केवल अनुमानित तारीख है।

Pregnancy Week का Formula

Gestational Age = वर्तमान तारीख − LMP

फिर:

Pregnancy Weeks = कुल दिन ÷ 7

उदाहरण:

70 दिन ÷ 7

= 10 सप्ताह

Trimester की गणना

पहला Trimester

LMP से 13 सप्ताह + 6 दिन तक

दूसरा Trimester

14 सप्ताह से 27 सप्ताह + 6 दिन तक

तीसरा Trimester

28 सप्ताह से आगे

महत्वपूर्ण जानकारी

Pregnancy Calculator द्वारा दी गई Due Date अनुमानित होती है। बच्चे का जन्म ठीक उसी तारीख को होना आवश्यक नहीं है। ACOG के अनुसार केवल लगभग 20 में से 1 महिला अपने estimated due date पर बच्चे को जन्म देती है।

यदि LMP की तारीख स्पष्ट नहीं है या menstrual cycle irregular है, तो डॉक्टर ultrasound और अन्य clinical information की सहायता से pregnancy dating कर सकते हैं। First-trimester ultrasound gestational age निर्धारित या confirm करने की सबसे सटीक विधि मानी जाती है।

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