This site is intended for healthcare professionals

Go to /sign-in page

You can view 5 more pages before signing in


Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The respiratory quotient is the ratio of carbon dioxide diffusing from blood into alveoli of the lung to oxygen diffusing in the opposite direction.

The normal value is approximately 0.8.

The respiratory quotient may be used to calculate the basal metabolic rate via the technique of indirect calorimetry.

Related pages

Create an account to add page annotations

Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page