Pregnancy Due Date Calculator

Calculate your estimated due date based on last menstrual period or conception date.

CalcLeap Editorial Team

Reviewed by certified professionals · Last updated April 1, 2026

Calculate your estimated due date based on last menstrual period or conception date.

First Day of Last Period

⚠️ Disclaimer: This calculator is for informational and educational purposes only. Results are not medical advice and should not be used to diagnose, treat, or prevent any health condition. Individual health needs vary. Always consult a qualified healthcare provider or physician before making health-related decisions. CalcLeap does not provide medical services or advice.

📐 How We Calculate This

Our calculations follow clinical guidelines from the CDC, WHO, and NIH. BMI uses the standard formula: weight (kg) / height (m²). Caloric estimates use the Mifflin-St Jeor equation, validated as the most accurate resting metabolic rate formula.

These tools are for informational purposes and do not replace medical advice. Consult a healthcare provider for personalized health recommendations.

Pregnancy Due Date Calculator

📐 How We Calculate This

📚 Sources & References