AHI Calculator (Apnea-Hypopnea Index)
Calculate your Apnea-Hypopnea Index (AHI) to evaluate sleep apnea severity based on the number of events and sleep duration.
Input Parameters
Enter details for calculation.
Apnea-Hypopnea Index
Expert Tip
AHI values: < 5 is normal, 5–15 is mild, 15–30 is moderate, and > 30 indicates severe sleep apnea requiring clinical evaluation (e.g. CPAP).
Calculation Methodology & Details
Formula
Combines partial (hypopnea) and complete (apnea) respiratory pauses per hour of sleep.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How AHI is Scored
Follow these steps to use this calculator:
Log Sleep Events
Enter the count of apneas and hypopneas from your sleep study or tracker.
Input Sleep Duration
Enter the total hours of actual sleep.
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ℹ️ About this Calculation
This sleep medicine calculator evaluates sleep architecture, circadian rhythm alignment, daytime sleepiness risk scores, and sleep apnea severity (AHI / STOP-BANG) based on clinical somnology protocols.
Variable Glossary
Sleep Data & Symptoms
Bedtime, wake time, total sleep duration, nocturnal awakenings, or questionnaire symptom scores.
Sleep Metrics
Sleep efficiency percentage, AHI severity tier, REM cycle counts, or sleep debt accumulation.
How to Calculate Step-by-Step
Step 1
Input your sleep times, duration, or answer the clinical assessment questions.
Step 2
Adjust target sleep goals or age-appropriate sleep recommendations.
Step 3
View optimal wake/sleep times, cycle counts, or clinical sleep disorder screening risk.