Pregnancy Calculator
Calculate your pregnancy due date, current week, and trimester based on your last menstrual period. Track important milestones throughout your pregnancy journey.
Due Date Accuracy
Calculate your estimated due date based on your last menstrual period using standard medical guidelines.
Baby Development
Track your baby's growth with fun fruit and vegetable size comparisons for every week of pregnancy.
Weight Tracking
Monitor your weight gain against recommended guidelines based on your pre-pregnancy BMI.
Milestone Guide
Stay informed about key pregnancy milestones, tests, and appointments for each trimester.
Your Companion Through Pregnancy
Pregnancy is a journey of changes. Our calculator provides more than just a date—it gives you a roadmap for the weeks ahead.
Medically Standardized
We use the standard Naegele's rule (LMP + 280 days) used by obstetricians worldwide to estimate due dates.
Personalized Insights
Get weight gain recommendations tailored specifically to your body type and pre-pregnancy health.
Complete Timeline
Visualize your entire pregnancy journey from conception to delivery with our trimester breakdown.
Did You Know?
Only about 5% of babies are born exactly on their due date. Most healthy pregnancies last between 37 and 42 weeks.
Pro Tip: The "due date" is just an estimate. Think of it as a "due month" to reduce stress as you approach the end of your pregnancy.
Trimester Quick Reference
| Trimester | Weeks | Key Developments | Common Symptoms |
|---|---|---|---|
| First Trimester | 1 - 12 | Baby's major organs form, heart beats | Nausea, fatigue, breast tenderness |
| Second Trimester | 13 - 26 | Gender reveal, movement felt, rapid growth | Energy returns, "glow", growing bump |
| Third Trimester | 27 - 40+ | Lungs mature, baby gains weight, head engages | Back pain, swelling, shortness of breath |
Complete Pregnancy Guide
Understanding Your Due Date
Pregnancy is calculated from the first day of your last menstrual period (LMP), not the day of conception. This is because most women know when their period started, but ovulation dates are harder to pinpoint.
This means you are technically considered "pregnant" about two weeks before conception actually occurred! A full-term pregnancy is 40 weeks from your LMP.
Healthy Weight Gain
Gaining the right amount of weight is important for your baby's health. The Institute of Medicine recommendations are based on your pre-pregnancy BMI:
- Underweight (BMI < 18.5): 28-40 lbs
- Normal Weight (BMI 18.5-24.9): 25-35 lbs
- Overweight (BMI 25-29.9): 15-25 lbs
- Obese (BMI ≥ 30): 11-20 lbs
Frequently Asked Questions
How accurate is the due date calculator?
It provides a good estimate based on a standard 28-day cycle. Your doctor may adjust your due date based on an early ultrasound, which is the most accurate method for dating a pregnancy.
When should I see a doctor?
You should schedule your first prenatal appointment as soon as you get a positive home pregnancy test. Most providers will see you around 8 weeks gestation.
What if my cycle isn't 28 days?
If you have irregular cycles, the LMP method might be less accurate. An early dating ultrasound will be the best way to determine how far along you are.
Is it safe to exercise?
Generally, yes! Moderate exercise is beneficial for most pregnancies. However, always consult your healthcare provider before starting or continuing an exercise routine.