The short version
Every calculator on this site runs entirely in your browser. The numbers you type — prices, shipping, costs — are never sent to us or to anyone else. There is no account, no login, and no database of your inputs. When you close the tab, that data is gone.
What we do and don't collect
Your calculator inputs: not collected. All fee math happens locally in JavaScript on your device. Nothing you enter leaves your browser.
Analytics: we use Google Analytics 4, provided by Google LLC, to understand which calculators people find useful so we can improve them. It measures aggregate, pseudonymous usage — pages viewed, referring site, approximate location (city/country level), and device and browser type. Google Analytics uses cookies to do this, so we load it only after you accept via the cookie banner; if you decline, it is not loaded and no analytics cookies are set. We enable IP anonymization, and we do not use analytics to identify you personally. You can withdraw consent at any time by clearing this site's cookies, and you can opt out of Google Analytics everywhere with the Google Analytics Opt-out Browser Add-on. See Google's Privacy Policy for how Google handles the data.
Advertising: this site is free and may be supported by advertising. If and when ads are enabled, the ad network (for example, Google AdSense) may set cookies or use similar technologies to serve and measure ads. Where those ads use cookies, you will be asked for consent, and you can manage or opt out of personalized advertising through Google Ad Settings and aboutads.info. This section will be kept current as advertising is added.
Cookies
The calculators themselves set no cookies. If you accept the cookie banner, Google Analytics sets a small number of cookies (typically _ga and _ga_<id>) to measure aggregate usage; if you decline, none are set. We also store your banner choice in your browser's local storage so we don't ask again. Advertising partners may set their own cookies once ads are live, as described above.
Third-party links
Pages link to official marketplace fee schedules (eBay, PayPal, Etsy and others) so you can verify the rates. Those sites have their own privacy policies, which we do not control.
Children
This site is a general-audience tool for online sellers and is not directed at children under 13. We do not knowingly collect any information from children.
Changes to this policy
We may update this policy as the site evolves — most likely when advertising or new features are added. The "last updated" date at the top will always reflect the current version.
Contact form
If you use our contact form, the email address and message you submit are sent to us through Formspree, a third-party form-processing service, so we can read and reply to it. We use that information only to respond to your message and do not use it for marketing. See Formspree's privacy policy for how they handle it. Using the form is entirely optional — the calculators themselves collect nothing.