Medical & ClinicalFree Tool

AHI Calculator | Apnea-Hypopnea Index

Provided byOmni Calculatoromnicalculator.com

AHI calculator looks for the Apnea-Hypopnea Index and offers help in diagnosis of obstructive sleep apnea.

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Sleep calculators
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About this tool

What AHI Calculator | Apnea-Hypopnea Index does

The AHI Calculator on Omni Calculator computes the Apnea-Hypopnea Index, a key metric that quantifies the average number of apnea and hypopnea episodes per hour of sleep. Users input the number of apnea episodes, hypopnea episodes, and actual sleep time to receive a score that reflects the severity of potential sleep-disordered breathing. The result helps clarify whether breathing interruptions fall into mild, moderate, or severe categories, offering a starting point for understanding sleep health. The site presents the calculation in plain language and immediately connects the score to broader health risks and related screening tools. Unlike many clinical calculators, this version embeds the result within a wider context of sleep health, offering quick links to related scales such as the Epworth sleepiness scale and STOP-BANG risk assessment, all on a single, ad-supported page that requires no login or registration.

Step by step

How to use the Omni Calculator AHI Calculator | Apnea-Hypopnea Index

  1. 1

    Enter the number of apnea episodes from your sleep recording

  2. 2

    Enter the number of hypopnea episodes from your sleep recording

  3. 3

    Input the total hours of actual sleep time

  4. 4

    View the calculated AHI score and its severity classification

  5. 5

    Use the share or clear functions to save or reset the calculation

Is it right for you

Best for

Individuals who have completed a home sleep study or overnight polysomnography and want a quick, free way to interpret their AHI score without clinical software; also useful for students and caregivers reviewing sleep study data.

Limitations

  • Not a medical diagnosis; results are estimates based on user-entered data
  • Relies on accurate manual input from the user's sleep report
  • No built-in validation to confirm numbers match a formal sleep study
Questions

AHI Calculator | Apnea-Hypopnea Index FAQ

What AHI score indicates obstructive sleep apnea?
An AHI between 5 and 15 is generally classified as mild obstructive sleep apnea, 15 to 30 as moderate, and above 30 as severe. The Omni Calculator displays these ranges immediately after computing your score.
Can I use this tool if I only have partial sleep data?
Yes, you can enter whatever numbers you have from your sleep report. The calculator will divide the total events by your actual sleep time to produce a score, though results are most reliable when all three data points are available.
Does the AHI calculator replace a doctor's evaluation?
No, the tool explicitly states it cannot replace professional medical advice. It is designed to help users understand their score and discuss it with a healthcare provider.
Are the severity ranges the same for adults and children?
The Omni Calculator focuses on adult AHI interpretation. Pediatric thresholds differ, and the site recommends consulting a pediatric sleep specialist for children's results.
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