Predicted Lung Capacity Calculator

The Predicted Lung Capacity Calculator computes the predicted vital capacity (VC) from age, gender, and height. Vital capacity represents the maximum volume of air that can be exhaled after maximum inhalation and is a fundamental indicator of respiratory function widely used in medical practice.

The formula varies by gender: for males, (27.63 - 0.112 × age) × height(cm), and for females, (21.78 - 0.101 × age) × height(cm). These formulas are based on Baldwin's equation and are standard in Japanese respiratory function testing.

By entering actual measured values, you can calculate %vital capacity (%VC = measured ÷ predicted × 100), with assessments such as 80% or above being normal and below 80% suggesting restrictive ventilatory impairment. Useful for understanding health checkup results and self-checking respiratory function.

All calculations run entirely in your browser with no personal data transmitted to any server.