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Privacy Policy
Effective Date: March 18, 2026
Last Updated: March 18, 2026
This Privacy Policy describes how Growth Chart Calculator ("we," "us," or "our"), operated at growthchartcalculator.org, collects, uses, and shares information when you visit our website.
Please read this policy carefully. By using this website, you agree to the practices described in this Privacy Policy.
Introduction
Growth Chart Calculator is a free online tool that helps parents check their child's height, weight, head circumference, and BMI percentiles using WHO and CDC growth standards.
We are committed to protecting your privacy. This policy explains:
- What information we collect when you visit our site
- How we use that information
- What cookies and third-party services we use
- Your rights regarding your personal data
- How to contact us with privacy-related questions
Information We Collect
We collect two broad categories of information.
2.1 Information You Do Not Need to Provide
Growth Chart Calculator does not require you to create an account, register, or submit personal information to use the calculator.
All growth calculations, including height, weight, age, and sex inputs, are performed entirely within your browser. The calculator does not place these measurements in the page URL or send them to Google Analytics or Google AdSense. This data is not stored in a central database and is not associated with any individual user identity.
2.2 Information Collected Automatically
When you visit our website, certain information may be collected automatically by analytics, advertising, hosting, and security services, including:
- IP address, anonymized where possible
- Browser type and version
- Operating system
- Referring URL
- Pages visited and time spent on those pages
- Device type, such as desktop, tablet, or mobile
- General geographic location at the country or region level
This information is collected through cookies and similar tracking technologies described below.
How We Use Information
The automatically collected information described above is used for the following purposes:
Yes: Understand how visitors use the website
Usage data helps us evaluate content quality and site performance.
Yes: Display relevant advertisements
Advertising services such as Google AdSense may use data to serve and measure ads.
Yes: Improve website performance and content
We review aggregated information to improve speed, clarity, and reliability.
Yes: Detect and prevent technical errors or abuse
Operational logs and traffic signals can help identify failures or misuse.
No: We do not sell personal data to third parties.
No: We do not use your data for direct marketing emails.
No: We do not store health data entered into the calculator.
Google AdSense and Third-Party Advertising
This website uses Google AdSense, an advertising service provided by Google LLC, to display advertisements. Our Google AdSense Publisher ID is ca-pub-4306979469592115.
How Google AdSense Works
- Show ads based on your prior visits to this website and other websites on the internet
- Measure the effectiveness of advertisements
- Prevent the same ad from being shown too many times
Google may use the DoubleClick cookie to serve ads based on a user's prior visits to our website or other websites. Users may opt out of the use of the DoubleClick cookie by visiting Google's Ad Settings.
Google and its advertising partners may use cookies, web beacons, IP addresses, and similar identifiers to serve and measure ads, limit how often an ad is shown, and personalize advertising where permitted.
Personalized vs Non-Personalized Ads
In the EEA, the United Kingdom, and Switzerland, advertising consent is denied by default. Until a user provides valid consent, Google AdSense is limited to non-personalized advertising. In other regions, where advertising consent is granted, Google AdSense may serve personalized advertisements based on browsing history and interests. You can change your choice through Cookie Preferences or opt out of personalized advertising at any time:
Google's Privacy Policy
- policies.google.com/technologies/partner-sites
- policies.google.com/technologies/ads
- policies.google.com/privacy
We do not have access to or control over cookies placed by Google or other third-party advertisers.
Google Analytics
This website uses Google Analytics 4 (GA4), a web analytics service provided by Google LLC, to help us understand how visitors interact with our site. Our GA4 Measurement ID is G-W9R9BXK1H7.
Google Analytics may collect information such as:
- How often users visit the site
- What pages they visit
- Page titles, visit duration, device and browser information
- Approximate geographic location and the referring page
We use this information to improve website content and user experience. The site does not send calculator measurements in its analytics page location: GA4 page views use only the origin and pathname, without query strings. Google Analytics may process the IP address assigned to you on the date you visit the site, subject to Google's processing controls.
We implement Google Consent Mode v2. For users in the EEA, the United Kingdom, and Switzerland, analytics and advertising storage are denied by default until the user makes a choice; before consent, Google may receive cookieless measurement pings. Users outside those regions receive the site's default consent setting and can change it at any time through Cookie Preferences.
We do not combine analytics information with personally identifiable information submitted to us by email. Google's use of analytics data is governed by its Privacy Policy.
Hosting Provider
This website is hosted and delivered through Cloudflare Pages. Cloudflare may process technical request data needed to deliver and secure the site. See the Cloudflare Privacy Policy for details.
Opting Out of Google Analytics
You can prevent Google Analytics from recognizing you on return visits by installing the Google Analytics Opt-out Browser Add-on:
tools.google.com/dlpage/gaoptout
Google's use of analytics data is governed by Google's Privacy Policy: policies.google.com/privacy
Third-Party Links
Our website may contain links to third-party websites, including:
- World Health Organization: who.int
- Centers for Disease Control and Prevention: cdc.gov
- American Academy of Pediatrics: aap.org
These links are provided for reference and informational purposes only. We are not responsible for the privacy practices or content of external websites.
We encourage you to review the privacy policy of any third-party site you visit.
Children's Privacy
About Our Users
Growth Chart Calculator is a tool designed for use by parents and caregivers to track children's growth. It is not directed at children themselves.
COPPA Compliance
In accordance with the Children's Online Privacy Protection Act (COPPA), we do not knowingly collect personal information from children under the age of 13.
- We do not require user registration
- We do not collect names, email addresses, or contact information from children through the calculator
- Health measurements entered into the calculator are processed locally in the browser and are not transmitted to our servers
If you believe we have inadvertently collected information from a child under 13, contact us immediately at contact@aigotowork.work.
Note on Growth Data
Height, weight, age, and sex values entered into the calculator are used only to compute growth percentiles. This data is never stored on our servers, logged as user health history, or associated with a user identity by us.
Your Rights Under GDPR (EEA and UK Users)
If you are located in the European Economic Area or the United Kingdom, you may have the following rights under the General Data Protection Regulation:
Right to Rectification
Ask us to correct inaccurate or incomplete personal data.
Right to Erasure ("Right to be Forgotten")
Request deletion of your personal data in certain circumstances.
Right to Restrict Processing
Ask us to limit how your personal data is processed.
Right to Data Portability
Receive your data in a structured, machine-readable format where applicable.
Right to Object
Object to certain processing, including direct marketing uses.
Legal Basis for Processing
- Legitimate interests for analytics and core website improvement
- Consent for advertising cookies where consent is required
How to Exercise Your Rights
To exercise any of the above rights, contact contact@aigotowork.work or midoriko053@gmail.com. We aim to respond within 30 days of receiving a valid request.
Your Rights Under CCPA (California Residents)
If you are a California resident, you may have the following rights under the California Consumer Privacy Act:
Right to Know
Ask what personal information we collect, use, disclose, and sell.
Right to Delete
Request deletion of personal information we have collected from you.
Right to Opt-Out of Sale
We do not sell your personal information to third parties.
Right to Non-Discrimination
We will not discriminate against you for exercising your privacy rights.
How to Submit a CCPA Request
To submit a request or ask questions about your California privacy rights, contact contact@aigotowork.work. We will respond to verified requests within 45 days.
Data Retention
Calculator Input Data
Growth measurements entered into the calculator are processed entirely within your browser and are never stored on our servers.
Retention period: zero, because the data is not collected by us.
Analytics Data
Aggregated usage data collected through Google Analytics, if enabled, may be retained for up to 26 months, after which it may be deleted or aged out under Google's controls.
Advertising Data
Data collected by Google AdSense for advertising purposes is governed by Google's own retention policies. Refer to policies.google.com/privacy for details.
Contact Inquiries
If you contact us by email, we may retain that correspondence for up to 12 months to handle your inquiry and maintain reasonable records.
Changes to This Privacy Policy
We may update this Privacy Policy from time to time to reflect changes in our practices, technology, legal requirements, or other factors.
When we make changes, we will:
- Update the "Last Updated" date at the top of this page
- Post the revised policy on this page
We encourage you to review this Privacy Policy periodically to stay informed about how we protect your information.
Your continued use of Growth Chart Calculator after any changes to this Privacy Policy constitutes your acceptance of the updated policy.
Contact Us
If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:
Growth Chart Calculator
Primary: contact@aigotowork.work
Alternate: midoriko053@gmail.com
We aim to respond within 2-3 business days.
For privacy-related requests under GDPR or CCPA, we will respond within the legally required timeframe, including 30 days for GDPR requests and 45 days for verified CCPA requests where applicable.
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