Apnea Hypopnea Index Calculator

Apnea Hypopnea Index Calculator calculator can be used to estimate the severity of sleep apnea by calculating the number of apneas and hypopneas per hour of sleep.

Input Parameters

Calculation Results

Calculation Formula

AHI = (Number of Apneas + Number of Hypopneas) / Sleep Duration (hours)

Where:
AHI: Apnea Hypopnea Index
Apneas: Number of complete pauses in breathing during sleep
Hypopneas: Number of partial pauses in breathing during sleep
Sleep Duration: Total duration of sleep in hours

Apnea Hypopnea Index Calculator Calculator Usage Guide

Learn how to use the Apnea Hypopnea Index Calculator calculator and its working principles

How to Use the Calculator

  1. Enter the number of apneas observed during sleep.
  2. Enter the number of hypopneas observed during sleep.
  3. Enter the total duration of sleep in hours.
  4. Click the "Calculate" button to compute the Apnea Hypopnea Index (AHI).
  5. The calculator will also indicate the severity of sleep apnea based on the AHI value.

Understanding the Results

The Apnea Hypopnea Index (AHI) is a key indicator of the severity of sleep apnea. A higher AHI value indicates more severe sleep apnea. The severity is categorized as follows:

  • Normal: AHI < 5
  • Mild: 5 ≤ AHI < 15
  • Moderate: 15 ≤ AHI < 30
  • Severe: AHI ≥ 30

Principle of Calculation

The AHI is calculated by dividing the total number of apneas and hypopneas by the total duration of sleep in hours. This gives an average number of breathing interruptions per hour of sleep.