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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
yrs
cm
ml

Enter a value to calculate % vital capacity

Result

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.

How it works

  • 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.