Free CPAP tool
Weekly CPAP Usage Average
Type in the hours your machine or app reports for each of the last 7 nights (0 for a night you did not use it). You get your total, your average across all 7 nights, your average on nights you used it, and how many nights reached 4 hours.
Formula
Total = sum of the 7 nights. Average over all nights = total / 7. Nights used counts every night above 0. Average on nights used = total / nights used. Nights of 4 hours or more counts nights at or above 4; their share = that count / 7 x 100.
Four hours is the line Medicare uses for adherence (4 or more hours on 70% of nights), so the last output tells you how a week compares with that 70% target. More hours generally means more benefit; 4 hours is a coverage minimum, not a goal.
Worked example
Nights of 6.5, 7, 3.5, 8, 5, 0 and 7.5 hours. Total = 37.5 h. Average over 7 nights = 37.5 / 7 = 5.36 h. Nights used = 6, so average on nights used = 37.5 / 6 = 6.25 h. Nights of 4 h or more = 5 (3.5 and 0 do not count). Share = 5 / 7 x 100 = 71.4%, just above 70%.
Assumptions and limits
- Use the usage hours your machine reports, which may combine several sessions in one sleep day.
- A single week is a snapshot; Medicare looks at a consecutive 30-day window.
Supplies that can help
A soft strap that supports the jaw to help keep the mouth closed, used mainly with nasal and nasal pillow masks to reduce mouth leaks.
Soft fabric liners that sit between your skin and the mask cushion to reduce skin irritation, red marks and the noisy leaks some people get from …
A pillow with cutouts or a contoured edge so a mask and hose are not pushed out of place when you sleep on your side.
Tubing with a built-in heating wire that keeps humidified air warm all the way to the mask, which is the main fix for rainout (water droplets …
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Frequently asked questions
How many hours a night should I use CPAP?
Use it whenever you sleep, all night if you can. Medicare's 4-hour line is a minimum for coverage, not a target. If you keep pulling the mask off, raise it with your clinician or supplier; a different mask or comfort setting often helps.
Why do I take my CPAP mask off in my sleep?
Common causes are leaks, a dry mouth or nose, pressure that feels too high, or a poorly fitting mask. A chinstrap, heated humidification or a mask refit can help. Pressure changes go through your prescribing clinician.
Does my average count nights I did not use CPAP?
The first average divides by all 7 nights, which is how compliance reports think about it. The second divides only by nights you used it, which shows how long you last once the mask is on.
Sources
Last reviewed October 11, 2026. How we research · Report an error