Pregnancy CalculatorWhen Is My Due Date?
Calculate your pregnancy due date and track your weeks of pregnancy. Enter your last menstrual period (LMP) or conception date to get an accurate pregnancy timeline, estimated delivery date, and current week of pregnancy.
Calculator Inputs
Valid range: 0 to 10000
Valid range: 0 to 10000
Results
This Pregnancy Calculator has 2 input fields. Enter your values to calculate the result using the formula: Result = Value1 × Value2
Complete Guide
Introduction
Our pregnancy calculator helps you determine your estimated due date and track your weeks of pregnancy. Whether you know your last menstrual period (LMP) or conception date, this calculator provides an accurate pregnancy timeline, helping you plan and prepare for your baby's arrival.
What This Calculator Helps You Do
- Calculate accurate due date from LMP or conception date
- Track current week and day of pregnancy
- See trimester information
- Plan prenatal care appointments
- Understand pregnancy milestones by week
- Share estimated due date with family and healthcare providers
How to Use the Calculator
- 1 Enter your values in the input fields provided
- 2 Review the automatic calculations and results
- 3 Adjust inputs to explore different scenarios
- 4 Use the results for your planning and decision-making
- 5 Save or share your calculations as needed
- 6 Consult professionals for personalized advice
Calculator Inputs Explained
Last Menstrual Period (LMP): The first day of your last period before pregnancy
Conception Date: The estimated date of conception
Standard Pregnancy: Calculated as 280 days (40 weeks) from LMP
How the Calculation Works
Pregnancy due date is typically calculated as 280 days (40 weeks) from the first day of the last menstrual period. This is called Naegele's rule. If you know your conception date, 266 days are added. Most pregnancies last between 266-280 days, with variation being normal.
Example Scenarios
LMP: January 1, 2024 → Due Date: October 8, 2024
Conception: January 14, 2024 → Due Date: October 8, 2024
At 20 weeks: Halfway through pregnancy, anatomy ultrasound typically performed
Understanding Your Results
- Due Date: Estimated delivery date (±2 weeks variation is normal)
- Current Week: Your current week of pregnancy (0-40 weeks)
- Current Day: Day within the current week (0-6)
- Days Remaining: Days until estimated due date
- Trimester: Current trimester of pregnancy
Who Should Use This Calculator
This pregnancy calculator is essential for pregnant women and couples trying to understand their pregnancy timeline, healthcare providers scheduling prenatal visits, family members and friends wanting to know when baby is expected, and anyone needing to calculate pregnancy dates for medical, personal, or planning purposes.
Important Notes & Disclaimer
This pregnancy calculator provides an estimated due date based on standard pregnancy calculations. Due dates are estimates only, with most babies born within 2 weeks before or after the calculated date. Ultrasound dating in early pregnancy is the most accurate method. Always consult with your healthcare provider for personalized pregnancy timeline and medical advice. This calculator is for informational purposes only.
Related Calculators
- Due date calculator for additional calculations
- Weeks calculator for other date calculations
- Ovulation calculator for conception timing
Frequently Asked Questions
How accurate is this calculator?
This calculator uses industry-standard formulas to provide accurate results based on your inputs. Results are estimates and may vary.
What information do I need?
You'll need the specific input values required by the calculator. All required fields are clearly labeled.
Can I save my results?
Yes, you can save results by taking a screenshot or noting the values for future reference.
Is my data secure?
Yes, all calculations are performed locally in your browser. We don't store your data.
How often should I use this?
Use the calculator whenever you need to make calculations or when your situation changes.
About This Calculator
This Pregnancy Calculator is a free online tool that helps you calculate results instantly. Simply enter your values in the input fields above, and the calculator will automatically compute the results using industry-standard formulas.