Month Calculator Pregnancy – Loan calculator

Pregnancy Month Calculator

Use this calculator to determine your current pregnancy month, week, and estimated due date based on your Last Menstrual Period (LMP) or an estimated due date.

Last Menstrual Period (LMP) Date:

Today's Date:

// Set default value for Today's Date to the current date window.onload = function() { var today = new Date(); var dd = String(today.getDate()).padStart(2, '0'); var mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0! var yyyy = today.getFullYear(); document.getElementById('todayDate').value = yyyy + '-' + mm + '-' + dd; }; function calculatePregnancyMonths() { var lmpDateStr = document.getElementById('lmpDate').value; var todayDateStr = document.getElementById('todayDate').value; if (!lmpDateStr || !todayDateStr) { document.getElementById('result').innerHTML = 'Please enter both the Last Menstrual Period (LMP) Date and Today\'s Date.'; return; } var lmpDate = new Date(lmpDateStr + 'T00:00:00'); // Add T00:00:00 to ensure UTC interpretation for consistency var todayDate = new Date(todayDateStr + 'T00:00:00'); if (isNaN(lmpDate.getTime()) || isNaN(todayDate.getTime())) { document.getElementById('result').innerHTML = 'Invalid date format. Please use YYYY-MM-DD.'; return; } if (todayDate < lmpDate) { document.getElementById('result').innerHTML = 'Today\'s Date cannot be before the Last Menstrual Period (LMP) Date.'; return; } // Calculate total days pregnant var diffTime = todayDate.getTime() – lmpDate.getTime(); var diffDays = Math.floor(diffTime / (1000 * 60 * 60 * 24)); var weeksPregnant = Math.floor(diffDays / 7); var daysIntoCurrentWeek = diffDays % 7; // Calculate Estimated Due Date (EDD) – 40 weeks (280 days) from LMP var eddDate = new Date(lmpDate.getTime() + (280 * 24 * 60 * 60 * 1000)); var eddFormatted = eddDate.toLocaleDateString('en-US', { year: 'numeric', month: 'long', day: 'numeric' }); // Calculate remaining weeks until EDD var remainingTime = eddDate.getTime() – todayDate.getTime(); var remainingWeeks = Math.ceil(remainingTime / (1000 * 60 * 60 * 24 * 7)); if (remainingWeeks = 1 && weeksPregnant = 5 && weeksPregnant = 9 && weeksPregnant = 14 && weeksPregnant = 18 && weeksPregnant = 22 && weeksPregnant = 27 && weeksPregnant = 31 && weeksPregnant = 36 && weeksPregnant 40) { currentMonth = 9; trimester = 'Third Trimester (Post-term)'; } else { currentMonth = 0; trimester = 'Not yet pregnant or very early'; } var resultHTML = '

Your Pregnancy Details:

'; resultHTML += 'Weeks Pregnant: ' + weeksPregnant + ' weeks and ' + daysIntoCurrentWeek + ' days'; resultHTML += 'Current Pregnancy Month (Approx.): Month ' + currentMonth + "; resultHTML += 'Trimester: ' + trimester + "; resultHTML += 'Estimated Due Date (EDD): ' + eddFormatted + "; resultHTML += 'Weeks Remaining until EDD: ' + remainingWeeks + ' weeks'; document.getElementById('result').innerHTML = resultHTML; } .calculator-container { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f9f9f9; padding: 25px; border-radius: 10px; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); max-width: 600px; margin: 30px auto; border: 1px solid #e0e0e0; } .calculator-container h2 { color: #333; text-align: center; margin-bottom: 20px; font-size: 1.8em; } .calculator-container p { color: #555; text-align: center; margin-bottom: 25px; line-height: 1.6; } .calculator-form .form-group { margin-bottom: 18px; } .calculator-form label { display: block; margin-bottom: 8px; color: #444; font-weight: bold; font-size: 1em; } .calculator-form .form-control { width: calc(100% – 20px); padding: 12px; border: 1px solid #ccc; border-radius: 6px; font-size: 1em; box-sizing: border-box; transition: border-color 0.3s ease; } .calculator-form .form-control:focus { border-color: #007bff; outline: none; box-shadow: 0 0 5px rgba(0, 123, 255, 0.2); } .calculate-button { display: block; width: 100%; padding: 14px; background-color: #28a745; color: white; border: none; border-radius: 6px; font-size: 1.1em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; margin-top: 25px; } .calculate-button:hover { background-color: #218838; transform: translateY(-2px); } .calculate-button:active { background-color: #1e7e34; transform: translateY(0); } .calculator-result { margin-top: 30px; padding: 20px; background-color: #e9f7ef; border: 1px solid #d4edda; border-radius: 8px; text-align: center; font-size: 1.1em; color: #155724; } .calculator-result h3 { color: #155724; margin-top: 0; margin-bottom: 15px; font-size: 1.5em; } .calculator-result p { margin-bottom: 10px; color: #155724; } .calculator-result p strong { color: #0f3d1a; } .calculator-result .error { color: #dc3545; background-color: #f8d7da; border-color: #f5c6cb; padding: 10px; border-radius: 5px; margin-bottom: 15px; }

Understanding Your Pregnancy Journey: Months, Weeks, and Trimesters

Pregnancy is a miraculous journey, typically lasting around 40 weeks from the first day of your Last Menstrual Period (LMP). While doctors and healthcare professionals often refer to pregnancy in weeks, many expectant parents prefer to track their progress in months. This calculator helps bridge that gap, providing you with an approximate pregnancy month, current week, and your estimated due date.

How Pregnancy Weeks and Months Are Counted

The standard way to calculate pregnancy duration begins with the first day of your Last Menstrual Period (LMP). This is because ovulation and conception dates can be difficult to pinpoint precisely. By starting from the LMP, healthcare providers have a consistent and reliable reference point.

Weeks: Pregnancy is officially 40 weeks long. This duration is divided into three trimesters.
Months: Converting weeks into calendar months can be a bit tricky because months have varying numbers of days (28-31). A common approximation is that a pregnancy month is roughly 4.33 weeks. However, for simplicity and common understanding, pregnancy months are often grouped into specific week ranges, as used in our calculator. For example, weeks 1-4 might be considered Month 1, weeks 5-8 Month 2, and so on. This means a full-term pregnancy is often described as 9 calendar months, even though it's 10 "lunar months" (40 weeks / 4 weeks per lunar month).

The Three Trimesters

Pregnancy is divided into three trimesters, each marked by significant developmental milestones for the baby and distinct changes for the mother:

First Trimester (Weeks 1-13):
This period begins with conception and ends around week 13. It's a time of rapid development, where the embryo transforms into a fetus with all major organs formed. For the mother, symptoms like morning sickness, fatigue, and breast tenderness are common.
Second Trimester (Weeks 14-26):
Often considered the "golden trimester," many women experience a decrease in early pregnancy symptoms and an increase in energy. The baby grows significantly, and you might start to feel the first movements (quickening). This is also when many routine ultrasounds are performed.
Third Trimester (Weeks 27-40+):
The final stretch! The baby continues to grow and mature, gaining weight and preparing for birth. The mother may experience increased discomfort, including back pain, swelling, and frequent urination. Regular monitoring becomes crucial as the due date approaches.

Estimated Due Date (EDD)

Your Estimated Due Date (EDD) is typically calculated as 40 weeks (280 days) from the first day of your LMP. It's important to remember that the EDD is an estimate, and only about 5% of babies are born exactly on their due date. Most babies arrive between 37 and 42 weeks of gestation.

Why Track Your Pregnancy?

Tracking your pregnancy in weeks and months helps you:

Understand your baby's developmental milestones.
Anticipate and prepare for physical changes in your body.
Communicate effectively with your healthcare provider.
Plan for appointments, classes, and the arrival of your baby.

While this calculator provides a helpful estimate, always consult with your doctor or midwife for personalized medical advice and the most accurate assessment of your pregnancy progress.