Welcome to the Global Lung Function Initiative calculators for Spirometry, TLCO, Lung volume and Multiple Breath Washout.

Click here for more information on each calculator and Click here for Help and more information on how to obtain calculations for single and multiple records and how to access our API. Click here to use our new Lung Function Tracker for longitudinal analysis.

Welcome to the Global Lung Function Initiative calculators for Spirometry, TLCO and Lung volume.

Click here for more information on each calculator and Click here for Help and more information on how to obtain calculations for single and multiple records and how to access our API. Click here to use our new Lung Function Tracker for longitudinal analysis.

Calculator Index Measured Predicted Z-Score LLN ULN % Predicted BDR % Change
Spirometry - pre-BD FEV1
FVC
FEV1/FVC
FEF25-75
FEV0.75
FEF75
FEV0.75/FVC
Spirometry - post-BD FEV1
FVC
FEV1/FVC
FEF25-75
FEV0.75
FEF75
FEV0.75/FVC
TLCO TLCO
VA
KCO
Lung Volume FRC
TLC
RV
RV/TLC
ERV
IC
VC
Multiple Breath Washout FRC_MBW
LCI

Ethnicity: The TLCO and Volume equations are based on Caucasian data only, however, the returned Spirometry data is based on the value you provided in the Spirometry section in the menu (Caucasian).


The equations and look-up tables are freely available for software implementation by IT engineers and medical device companies.

The GLI software packages are to be used for research, education, training and validation of implementation in software, and not for use in patient treatment.

For treatment/diagnostic purposes, please use the GLI reference equations as implemented by medical device companies.

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Date:

Units:

Sex:

Age: years

Height: cm

Spiro_ethnicity: