Spirometry Interpretation Calculator
Interpret spirometry (pulmonary function test) results to identify obstructive or restrictive ventilatory patterns.
Important Health Disclaimer
This calculator provides general health information based on standard medical formulas and WHO guidelines. Results are for informational and educational purposes only and should not be considered as professional medical advice, diagnosis, or treatment recommendations.
For health concerns, medical conditions, fitness plans, or dietary decisions, please consult with qualified healthcare professionals, licensed physicians, registered dietitians, or certified fitness trainers who can evaluate your individual health status and medical history.
Individual health needs vary significantly. These calculations are general estimates and may not be appropriate for everyone, especially those with existing medical conditions, pregnant women, children, or elderly individuals.
Not a substitute for professional medical advice
Patient Information
Pre-Bronchodilator Values
Post-Bronchodilator Values
Interpretation
Normal
No Impairment
FEV1
76%
of predicted
FVC
88%
of predicted
FEV1/FVC
75%
Normal
Bronchodilator Response
FEV1 Change
10% (300 mL)
Significant Response
No
Significant = ≥12% AND ≥200 mL improvement
Interpretation
Spirometry values are within normal limits.
Predicted Values
Predicted FEV1: 3.96 L
Predicted FVC: 4.53 L
Disclaimer: This calculator uses simplified prediction equations. Interpretation should be made by qualified healthcare professionals in clinical context. Full pulmonary function testing may be needed for complete evaluation.
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