Privacy

Last updated September 6, 2026

Percentage Tool is operated by Chris Holcomb.

Your calculations

Percentage Tool calculates in your browser. Numbers you enter and calculated results are not sent to a server, included in the URL, or saved in browser storage by this site. Each mode retains its inputs while the page is open. Reloading the page clears those inputs. Copy result places the result on your device's clipboard, which is managed by your device and browser.

Hosting and connection information

Amazon Web Services (AWS) delivers and protects the site. Loading a page or file sends connection information, such as your IP address and browser request information, to the hosting service. These requests do not include calculator inputs or results. See the AWS Privacy Notice for information about AWS's practices.

Google privacy messages and advertising

We use Google AdSense and Google's consent management platform to provide regional privacy choices. Google's scripts receive connection and device information, such as your IP address and browser information, and may store your consent or opt-out choices in cookies or browser storage. We do not send your calculator inputs or results to Google.

Ad display is currently disabled while the site is under review. When advertising is enabled, Google and other advertising vendors may use cookies, device identifiers and information about visits to this and other websites to serve and measure ads. Google's advertising cookies allow Google and its partners to personalize ads based on those visits, where permitted by your choices and applicable requirements.

The consent message's list of partners identifies participating advertising vendors, their purposes and their privacy policies. Read Google's Privacy Policy and how Google uses information from sites that use its services. You can manage Google's personalized advertising in My Ad Center and learn about other participating vendors' advertising choices at YourAdChoices.

Your privacy choices

In the European Economic Area, United Kingdom and Switzerland, Google's message provides Consent, Do not consent and Manage options. Use Privacy & cookie settings in the footer to revisit the message, change your choices or withdraw consent. In supported US states, Google's Do Not Sell or Share My Personal Information link provides the applicable opt-out choice. These controls appear where Google's regional messages apply and require its scripts to load.

Your browser also provides controls for cookies, site data and clipboard permissions. Blocking or deleting cookies may affect saved privacy choices. Following an external link opens a service with its own privacy practices.

Analytics

Usage analytics are disabled. We do not run Google Analytics or send calculator-use events to an analytics service.

Changes to this notice

We will update this page when the site's data practices change. The date above identifies the latest update.