Privacy Policy

LabDiagram privacy: formulas you type are worked out in your browser and not sent to the server

Last updated October 12, 2026. This policy explains what labdiagram.com handles when you use a figure or calculator or send feedback.

Calculations stay in your browser

Molar mass, molarity and other calculators run on your device. The formulas and numbers you type are not sent to our server or stored.

Server logs

Our server logs your IP address, the time, the page requested, your browser string and the response code. We use them to run the site and stop abuse and delete them after a short time.

The five server log fields LabDiagram keeps briefly: IP address, time, page, browser string and status code

Feedback

If you use the “helpful” or “needs work” buttons and send the form, we store the time, your choice, the page, the topic and any note (up to 1,000 characters). Your IP address is not stored with it; a one-way hash is kept for 20 seconds to slow spam. Please keep personal details out of the note. The newest 300 entries are kept and we delete yours if you Use the contact form, choose “Rights or removal request” and give the page and rough time; the matching entry is deleted.

Emails you send us

If you write to [email protected], your message and address are used only to reply, and the thread is deleted when the matter is closed.

Cookies, analytics and ads

LabDiagram sets no cookies, runs no analytics and shows no ads today. Before that changes we will update this page and ask for consent where the law requires.

LabDiagram today: zero cookies, zero analytics and zero ads

Delivery network

Pages go through a content-delivery and security provider that processes visitor IP addresses to route traffic and block attacks.

Students and children

Students of all ages use the sheets. The site does not ask for names, ages or accounts and does not knowingly collect personal data from children.

Your rights

If the GDPR, UK GDPR or California privacy law applies to you, you may ask for access to, correction of or deletion of data we hold about you. Email the review form on the contact page (choose “Rights or removal request”). You can also write to [email protected].

Frequently asked questions

Are my formulas saved?

No. They exist only in the open tab.

Do you run tracking?

No analytics or advertising trackers are used today.

How do I delete feedback I sent?

Use the contact form, choose “Rights or removal request” and give the page and rough time; the matching entry is deleted.

Back to the Molecular Weight Calculators. See also the about page and terms.