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Updated January 2026

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Lung Health Calculator

Calculate your lung function percentile and estimated lung age based on FEV1 and PEF values

Your Details

2090
L

Expected range for your age/sex: 3.4 - 5.0 L

L/min

Expected range for your age/sex: 448 - 672 L/min

How to Get Your Values

Professional Spirometry (Best)

Visit a pulmonologist or use a hospital/clinic spirometer. Most accurate results.

Home Peak Flow Meter (~$20)

Can measure PEF at home. Available on Amazon. Test 3 times, use best result.

Smart Spirometers (~$300)

Devices like Spirohome can measure FEV1 and FVC at home with clinical accuracy.

FEV1 Percentile
40th
PEF Percentile
29th
Estimated Lung Age
45 years

10 years older than your actual age

Below Average

Your lung function is lower than expected. Consider lifestyle modifications and consult a healthcare provider.

Recommendations
  • Consult a healthcare provider for a full pulmonary evaluation
  • Start a gradual aerobic exercise program
  • If smoking, prioritize smoking cessation
  • Improve indoor air quality
  • Practice breathing exercises daily
Elite Benchmark: Kayla Barnes-Lentz

At age 35, Kayla achieved FEV1: 4.60 L and PEF: 573 L/min—placing her in the 99th percentile for females. This level correlates with exceptional cardiovascular fitness and longevity markers.

Research & Context

Why Lung Function Matters

  • All-Cause Mortality: FEV1 is a strong predictor of overall mortality, independent of smoking status. Low FEV1 increases mortality risk significantly.
  • VO2 Max Correlation: Lung function directly impacts your ability to deliver oxygen during exercise and correlates with VO2 max.
  • Brain Health: Adequate oxygen delivery supports cognitive function and may reduce dementia risk.

How to Improve

  • Aerobic Exercise: Regular cardio improves lung capacity over time
  • Respiratory Muscle Training: Devices like POWERbreathe can strengthen respiratory muscles
  • Breathing Exercises: Diaphragmatic breathing, box breathing
  • Avoid Pollutants: Air filters, avoid smoke, reduce exposure
View VO2 Max Optimization Protocol