Vital Capacity (Predicted) Calculator

Estimate predicted vital capacity from sex, age, and height with the Baldwin equation. Add a measured value to get % vital capacity.

Input

Estimates your predicted vital capacity from sex, age, and height using the Baldwin equation. This tool is a guide only and is not a diagnosis.

Sex

Age

yrs

Height

Measured vital capacity (optional)

Enter a value to calculate % vital capacity

Predicted vital capacity (Baldwin equation)

4,126ml

About 4.13 L

Predicted

4.13 L

Formula

(27.63 − 0.112 × 30) × 170

* % vital capacity = measured ÷ predicted × 100. A value of 80% or higher is generally considered within the reference range.

Predicted vital capacity is calculated with the Baldwin equation. Male = (27.63 − 0.112 × age) × height in cm (mL); Female = (21.78 − 0.101 × age) × height in cm (mL).
Enter your sex, age, and height to display the predicted vital capacity (mL/L). The predicted value decreases as age increases.
Enter a measured vital capacity to calculate % vital capacity (measured ÷ predicted × 100). A value of 80% or higher is generally taken as the reference; a lower value may suggest a restrictive ventilatory impairment.
The predicted value is a statistical estimate, so it can differ from the measured value depending on body build and measurement conditions.
Vital capacity is just one indicator of health. Respiratory function is assessed together with other tests, such as the FEV1 ratio.
This tool provides estimates based on general formulas and is not a diagnosis or medical advice. Always consult a doctor for health-related decisions.

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