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FVC

Breathing tests · also printed as FVC (L), Forced vital capacity, FVC litres, Forced vital capacity (L), FVC actual

Typical UK adult rangeNo single typical range

No fixed range; read against the printed predicted value.

What this test measures

FVC is the total volume of air that can be blown out after the deepest possible breath in. It reflects lung size and the stiffness of the lungs and chest.

Why doctors request it

Part of spirometry, used with FEV1 to distinguish narrowed airways from stiff or small lungs.

What commonly pushes it up

There is no problem with a high value

What commonly pushes it down

Stiff lungs (fibrosis) and chest wall problems
Weak breathing muscles
Severe airway narrowing that traps air
Poor effort or a short blow

Everyday reasons for a value outside the range

The predicted value depends on age, sex, height and ancestry
Stopping the blow early lowers it

About the sample

Read with FEV1 and the ratio.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

Got a report with FVC on it?

Upload a photo or PDF and see every line against the range your lab printed, explained in plain English. First report free.

Read my report free

This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.