1. Introduction
MacrosMeasure ("we", "us", or "our") operates the website at macrosmeasure.com — a free collection of science-backed nutrition calculators. This Privacy Policy explains how we collect, use, and protect information when you visit our site.
This policy is effective as of April 9, 2026 and applies to all visitors from all countries, including the European Union (GDPR) and California (CCPA). By using this site, you agree to the practices described here.
We have designed MacrosMeasure to be privacy-first by architecture: all nutrition calculations run locally in your browser. Your height, weight, age, and other health inputs are processed on your device only and are never transmitted to our servers.
2. Information We Collect
A. Automatically Collected (via Google Analytics)
When you visit MacrosMeasure, Google Analytics automatically collects non-personally-identifiable information including:
- IP address (anonymised — the last octet is masked)
- Browser type and version
- Operating system and device type
- Pages visited and time spent on each page
- Referring URL (how you found us)
- General geographic location (country/city level)
This data is aggregated and anonymous. We use it solely to understand which calculators are most useful and to improve the site.
B. Calculator Inputs — NOT Collected
All calculation inputs (weight, height, age, activity level, etc.) are processed entirely in your browser using JavaScript. This data is never sent to MacrosMeasure servers and is discarded when you close or refresh the page.
C. Contact Form Submissions
If you use our contact form, we collect your name, email address, subject, and message. This data is processed by Formspree (our form provider) and used solely to respond to your enquiry. We do not store form submissions in our own database.
D. Cookies
MacrosMeasure uses cookies set by Google Analytics and Google AdSense. See Section 4 for full details.
3. How We Use Your Information
We use the information collected for the following purposes:
- To improve calculator accuracy, user experience, and site performance.
- To analyse traffic patterns and understand which tools are most used, via Google Analytics.
- To serve relevant advertisements via Google AdSense — this keeps all tools free for users.
- To respond to contact form enquiries and support requests.
- To monitor site security, diagnose technical issues, and prevent abuse.
We do not sell, trade, or rent your data to any third party for their own marketing purposes.
5. Google AdSense & Advertising
MacrosMeasure uses Google AdSense to display advertisements. This is how we fund the site and keep all 18 tools permanently free.
Google, as a third-party vendor, uses cookies — including the DART cookie — to serve ads on MacrosMeasure based on your prior visits to this site and other websites across the internet.
Third-party vendors and ad networks, including Google, may use cookies, web beacons, and similar technologies to collect information about your visits to MacrosMeasure and other sites in order to provide advertisements that may be of interest to you.
You may opt out of personalised advertising by visiting Google Ads Settings (adssettings.google.com) or by visiting the Digital Advertising Alliance opt-out page.
For more information on how Google uses data from sites that use its advertising services, see: How Google uses data when you use our partners' sites or apps.
MacrosMeasure has no control over the ads served by Google and accepts no responsibility for the content of third-party advertisements displayed on this site.
6. Third-Party Services
Anonymised usage data: page views, session length, device type, general location.
→ Google's Privacy PolicyAdvertising identifiers, cookie data for ad personalisation, and aggregate ad performance metrics.
→ Google AdSense Privacy PolicyContact form submissions (name, email, message) submitted voluntarily by users. Data is retained per Formspree's own policy.
→ Formspree's Privacy Policy7. Data Retention
- Calculator inputs: not retained — processed locally and discarded when you leave the page.
- Google Analytics data: retained for 14 months, then automatically deleted per GA4 default settings.
- Contact form submissions: deleted within 90 days unless ongoing correspondence is required.
- Server logs (IP addresses, request timestamps): retained for up to 30 days for security monitoring.
8. Your Rights (GDPR / CCPA)
GDPR (European Union)
If you are in the EU or EEA, you have the right to:
- Access the personal data we hold about you.
- Request correction of inaccurate data.
- Request deletion of your data ("right to be forgotten").
- Object to processing or request restricted processing.
- Data portability — receive your data in a machine-readable format.
- Withdraw consent at any time where processing was based on consent.
CCPA (California)
If you are a California resident, you have the right to:
- Know what personal information is collected and how it is used.
- Request deletion of your personal information.
- Opt out of the sale of personal information — we do not sell personal information.
- Non-discrimination for exercising your CCPA rights.
To exercise any of these rights, email us at privacy [at] macrosmeasure [dot] com or use our Contact page. We will respond within 30 days.
9. Children's Privacy
MacrosMeasure is intended for users aged 13 and older. We do not knowingly collect personal information from children under 13. If you believe a child under 13 has submitted personal information through our contact form, please contact us immediately at privacy [at] macrosmeasure [dot] com and we will delete it promptly.
10. Changes to This Policy
We may update this Privacy Policy from time to time to reflect changes in our practices, technology, or legal obligations. Any changes will be posted on this page with an updated "Last updated" date at the top. We encourage you to review this page periodically. Continued use of MacrosMeasure after changes are posted constitutes your acceptance of the updated policy.
11. Contact
Questions about this policy?
If you have questions, concerns, or wish to exercise your data rights, please contact us or email privacy [at] macrosmeasure [dot] com. We will respond within 30 days.