SPIROMETRY CALCULATOR

Turn your numbers into a smarter breathing workout.

Enter two spirometry measurements and your activity level. We’ll compare your respiratory structure with a relevant training benchmark, assess function, and suggest the Isocapnic program focus that best fits you.

Your information

Build your profile

Age

years

This adult reference calculation supports ages 18–70.Sex used for calculationRequired by the sex-specific spirometry reference equation.

Height

Weight optional

Collected for analysis only; it does not change the calculation.

Your activity

Choose your training level

Which best describes your typical activity level during the past three months?

SedentaryLittle or no planned exercise; generally less than 1 hour per week.Lightly activeEasy recreational exercise; generally 1 to less than 5 hours per week.Moderately activeRegular structured exercise; generally 5 to less than 10 hours per week.Highly activeStructured training; generally 10–20 hours per week, often including competitive or endurance-focused activity.Elite athleteTypically trains more than 20 hours per week and competes at an advanced national, international, professional or equivalent level.

Choose the level that described you for most of the past three months. If you fall between two levels, select the lower level.

Your spirometry

Enter your test results

FEV1

litres

Air exhaled during the first second.FVC

litres

Total air exhaled during the test.

Your entries stay in this browser unless you later choose to contribute them.

Training guidance, not a diagnosis.

This calculator provides an Isocapnic training profile for athletic and wellness purposes. It does not diagnose respiratory conditions or replace interpretation by a qualified healthcare professional. Speak with a physician if your results or symptoms concern you.