About this site

Who makes it

eGFR.app is built and maintained by Markus Hovd.

Why it exists

Different eGFR equations can give quite different results for the same patient. Which ones apply depends on the patient’s age and on which blood tests you have. The calculator works out every equation it can, suggests one, and shows the others next to it.

How the equations are checked

• Each equation follows its original publication. Its equation page cites the paper and shows the formula and constants.
• Automated tests check each equation against values worked out from its published coefficients. They run on every change to the code.
• An equation used outside the group it was validated in is labelled, and is never shown at the top.

Funding and interests

eGFR.app is free, with no adverts and no accounts. It does not store what you enter. The calculations run in your browser, and the values are only kept in the page address, so you can share a link. The project has no funding and no commercial interests.

Report an error

If a result, formula or reference looks wrong, write to hello@egfr.app with the values you entered. It will be corrected as soon as possible.