Offline calculator
Run the blood gas calculator offline from a single HTML file. Phone installation, ZIP and HTML downloads.
Install on a phone
Open this site in your phone’s browser. Use Install / offline for installation instructions and offline saving.
- iPhone or iPad: open in Safari, choose Share, then Add to Home Screen. Turn on Open as Web App if offered.
- Android: open in Chrome and choose Install app, or use Add to Home screen in the browser menu.
Open the home-screen app while online and choose Install / offline → Save for offline there. This matters on iPhone/iPad, where the installed app may have separate storage from Safari. Wait for the offline-ready confirmation, then reopen it in airplane mode to check it works on your device. A home-screen shortcut alone does not confirm that the files were saved. Browsers can remove offline storage, particularly when storage is low.
No App Store account is needed. Saving the app does not save your entered measurements. The single-file download below is an alternative, especially on a computer; opening downloaded HTML is less reliable on some phones.
Version 5.11.0. The offline file contains the calculator, charts, examples and references.
- Download ZIP230 KB
Recommended. Extract the ZIP, then open the HTML file in a browser.
- Download HTML667 KB
The complete offline calculator in one file. No installation or external fonts.
Using the file offline
- Save the ZIP and extract it, or save the HTML file directly.
- Open the HTML file in a current browser.
- Keep exports of saved cases if you change browser or move the file.
Browser storage for local files varies. An offline file does not update automatically; download a new copy to use a later version.