Pregnancy Calculators

EDD • Gestational Age • BMI • Bishop Score

Expected Date of Delivery

First Day of LMP

Current Gestational Age

First Day of LMP

BMI Calculator (Pre-Pregnancy)

Weight (kg)

Height (cm)

Bishop Score (Labor Readiness)

Cervical Dilation (cm) Select 0 cm 1-2 cm 3-4 cm ≥5 cm

Cervical Effacement (%) Select 0-30% 40-50% 60-70% ≥80%

Station Select -3 -2 -1/0 +1/+2

Cervical Consistency Select Firm Medium Soft

Cervical Position Select Posterior Mid Anterior

How Each Calculator Works

• EDD: Naegele’s Rule (LMP + 280 days)
• GA: Days since LMP → weeks + days + trimester
• BMI: Weight(kg) / [Height(m)]² → WHO categories
• Bishop Score: 0–13 scale; ≥8 = favorable for induction

BMI Categories (WHO)

• < 18.5 → Underweight
• 18.5–24.9 → Normal
• 25–29.9 → Overweight
• ≥30 → Obese

Bishop Score Interpretation

• 0–5: Unfavorable (induction may fail)
• 6–7: Intermediate
• 8–13: Favorable (good chance of successful induction)

Medical Disclaimer: These tools are for educational purposes only. They do not replace professional medical assessment. Always consult your OB-GYN or midwife.

© 2025 Pregnancy Tools for Bloggers • Free to Use & Embed