Calculators

Common tools

Selected calculator

AHI by Stage or Position

Event rate within the same sleep stage, position or treatment segment.

Selected conditionCalculation intervalApneas in selected condition(count)Required — enter a known zero explicitly where applicable.Hypopneas in selected condition(count)Required — enter a known zero explicitly where applicable.

Sleep time in selected condition(minutes)Required — enter a known zero explicitly where applicable.

Hypopnea definitionRequired — enter a known zero explicitly where applicable.

Result

Complete or correct the marked inputs to calculate. Blank values are not zero.

Condition AHI = (condition apneas + condition hypopneas) × 60 / condition sleep minutes

Combined AHI = sum(segment events) × 60 / sum(segment sleep minutes)

Full precision is used internally. Only displayed results are rounded, normally to one decimal place.

For training use. Follow your lab’s scoring rules and physician interpretation. Calculations use already-scored measurements, stay on this device, and do not diagnose or recommend treatment. Do not enter patient identifiers.