Privacy

Your calculator inputs

Every calculation on Chalk Calculator runs in your browser. Your salary, your loan balance, your debts, your retirement savings — none of it is transmitted to a server, written to a database, saved in your browser storage, or put in the page URL.

This is architectural, not a policy promise. The site is a static export with no server runtime, no API routes and no database. There is nowhere for your figures to be sent even if something tried. The result-sharing feature copies plain text to your clipboard rather than building a link, precisely because a URL containing someone’s salary would end up in browser history, referrer headers and server logs.

Analytics

This site uses Cloudflare Web Analytics. It records which pages are viewed, a coarse device category and where visitors arrived from. It sets no cookies, stores nothing on your device, and builds no profile that follows you to other sites.

It never records anything you type. It cannot: it reads the address of the page and nothing inside it, and because no calculator ever puts a value in the URL, there is nothing for it to see. The tracking function in our own code takes a calculator name and nothing else — there is no parameter for a value, so no future change can accidentally start sending your numbers.

It is the only third-party script the site loads, and it comes from Cloudflare, who already serve every page here. Allowing it extends trust to nobody new.

Cookies

Chalk Calculator sets no cookies of its own. Your theme preference, if you set one, is stored in your browser’s local storage and never sent anywhere.

Advertising

The site is designed to be supported by advertising. Where ads are shown, the ad provider may set its own cookies and collect data under its own policy — that is outside our control and worth reading. What the ad provider can never receive is your calculator inputs, because those never exist outside your browser’s memory.

Accounts and personal data

There are no accounts, no sign-ups, no newsletters and no contact forms. The site collects no names, email addresses or any other personal information, because there is no feature that would use them.

If you choose to email the contact address on the About page, your message is read by the site operator, Holmes Interactive LLC, and used only to reply to you. It is never added to a mailing list or shared. The address is a Gmail account, so Google handles its delivery.

How to verify this

Open your browser’s developer tools, switch to the network tab, and use any calculator on the site. You will see no request carrying your inputs, because none is made.