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Apnea and Hypopnea Events per Sleep Hour

Adult scoring uses study-defined apnea and hypopnea events and actual sleep time, not recording time.

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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.

Formula and method

Counts 30 and 30 during six hours give 10 events/hour.

AHI = (apneas + hypopneas) / sleep hours.

Worked example

Enter these known values and leave the other values blank.

Apnea events
30 #
Hypopnea events
30 #
Total sleep duration
6:0 hrs / min
Events per sleep hour
10

Assumptions and limitations

  • Adult scoring uses study-defined apnea and hypopnea events and actual sleep time, not recording time. Adult severity bands do not apply to children. AHI alone does not establish a diagnosis.
  • Arithmetic inverses use independent observations. Clear the unknown control before entering the remaining measurements.
  • This measurement calculation does not determine a diagnosis or treatment.

Common questions

How is this result calculated?

AHI = (apneas + hypopneas) / sleep hours.

Which measurements and units should I use?

Adult scoring uses study-defined apnea and hypopnea events and actual sleep time, not recording time. Adult severity bands do not apply to children. AHI alone does not establish a diagnosis.

References

Bookify adds independently reviewed bounds for ahi: isInteger(apopnea) and apopnea >= 0; isInteger(hipopnea) and hipopnea >= 0.

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