You may notice that your calculator is flickering/flashing on the page. This is usually due to a privacy setting in Safari browsers that is blocking the content. Chrome and other browsers come with this setting ‘off’ by default, while Safari comes with it ‘on’ by default.

You can switch this setting off by going into Preferences, then Privacy and unchecking the Prevent Cross-Site Tracking setting.

This is a global setting, so we recommend viewing this calculator in another browser instead.