Pregnancy & Child Health Tools
See all-in-one suite of 7 calculators for Due Date, Pregnancy Weight Gain, Ovulation, Fertility, Baby Growth, Child BMI, and Child Height Prediction.
Last updated: June 11, 2026
Due Date Calculator
Calculate estimated due date, current week, trimester, and baby size.
You are in
Weeks
Days
Estimated Due Date
Thursday, February 4, 2027
Baby Size
Plum
Approximate size comparison
Key Milestones
Implantation
Week 4
Heartbeat detected
Week 8
End of first trimester
Week 12
Gender may be visible
Week 16
Halfway! Anatomy scan
Week 20
Viability reached
Week 24
Third trimester begins
Week 28
Baby usually head-down
Week 36
Full term! Due date
Week 40
Pregnancy & Child Health Tools — No Uploads Required
A professional Online Pregnancy & Child Health Calculator Suite containing 7 essential tools for expectant mothers and parents. Track your pregnancy due date using Naegele's Rule, monitor recommended gestational weight gain by IOM 2009 BMI guidelines, identify your fertile window with the Ovulation and Fertility calculators, and track your child's growth against WHO standards. All calculations run 100% locally in your browser for complete privacy.
Why This Tool Exists
What makes this useful — and why I built it this way.
One Stop: Everything from due dates to child growth in a single dashboard.
Clinically Referenced: Formulas based on WHO, IOM, CDC, and Tanner standards.
Privacy First: No data leaves your device.
When You'd Use This
Real situations where this tool saves the day.
Pregnancy Planning: Calculate due dates and track recommended weight gain.
Fertility Tracking: Find ovulation and fertile window dates.
Child Development: Monitor growth percentiles and predict adult height.
Using Pregnancy & Child Health Tools
It's straightforward — here's how it works.
Select a sub-calculator from the sidebar.
Set your core stats in the Shared Profile bar (age, weight, height, LMP, cycle length).
Adjust inputs specific to the selected calculator.
View results instantly and copy or download a PDF report.
How The Numbers Work
The formulas behind the calculations — for transparency.
Naegele's Due Date Estimation Rule
Standard pregnancy wheel calculation assuming a regular 28-day menstrual cycle and ovulation occurring on day 14 of the cycle.
Tanner Mid-Parental Child Adult Height Predictor
Standard clinical pediatric model to forecast child target adult height adjusted for biological sex parameters based on parental heights.
Child Body Mass Index (BMI) Percentile
Evaluates child body weight relative to growth curve percentiles for children and teens aged 2 through 19.
Questions People Ask
Honest answers about how this works.
Is my health data stored?
No. All calculations run entirely in your browser's local memory. Nothing is sent to any server.
What formula is used for the due date?
Great question. We use Naegele's Rule: add 280 days (40 weeks) to the first day of your last menstrual period (LMP). You can also calculate from a known conception date.
Discover More Tools
Hand-picked utilities to speed up your workflow.
Expert Insights
Learn more about privacy, image processing, and modern design.
How AI is Revolutionizing Image Editing
Explore the profound impact of neural networks on modern creative workflows, from automated background removal to generative upscaling. Learn how AI tools are democratizing design for everyone.
The Importance of Privacy-First Web Tools
In an era of constant data tracking, discover why client-side processing is the future of digital security. We dive deep into how Imgira protects your sensitive data by keeping everything in your browser.
WebAssembly: Powering the Next Gen of Browser Apps
Discover how WebAssembly (Wasm) is bridging the gap between desktop performance and web accessibility. Learn why complex image processing can now happen instantly within a standard web browser.
a guide to Image Compression Without Quality Loss
learn of efficient web performance by a guide to the balance between file size and visual fidelity. We compare modern algorithms and show you how to optimize assets for the fastest load times.