How to use the predicted lung capacity calculator
Estimate predicted forced vital capacity. Enter height, age, sex in the fields above; the predicted fvc is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- h — Height (cm)
- a — Age (years)
- s — Sex (—)
Worked example
With height = 175 cm, age = 30 years, sex = Male, the calculator gives predicted fvc ≈ 4.0765 L.
Frequently asked questions
What is the formula for the predicted lung capacity calculation?
Predicted FVC (L) = s===1?0.0443 × h-0.0262 × a-2.89:0.0309 × h-0.0211 × a-0.1. Here h is height (cm), a is age (years), s is sex (—).
What inputs do I need for the predicted lung capacity calculator?
You need height in cm, age in years, sex in —. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.