Pregnancy Conception Calculator
Estimate your conception date and fertile window based on your due date or last menstrual period.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making any health-related decisions or starting any diet or exercise programme.
How to Use the Conception Date Calculator
Enter your estimated due date to calculate the conception date, fertile window, and last menstrual period.
Formula
LMP = Due Date − 280 days. Conception ≈ LMP + 14 days. Fertile window ≈ LMP + 11–17 days.
Frequently Asked Questions
How accurate is the conception date estimate?
Conception date estimates are ±2–3 days based on average ovulation timing. Actual conception depends on sperm/egg viability and individual cycle variation.
Related Fitness & Health Calculators
Macros Calculator
Find your target protein, carbs, and fat (IIFYM) based on your weight goals and diet style.
Ovulation Calculator
Track your menstrual cycle and predict your most fertile window and next period date.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see your weight category.
Calorie Calculator
Find your Total Daily Energy Expenditure (TDEE) based on age, weight, height, and activity level.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method with circumference measurements.
BMR Calculator
Calculate your Basal Metabolic Rate using both Mifflin-St Jeor and Harris-Benedict formulas.