Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. In the first example the result is +10.5 hours.
The calculator is not a sleep study and does not set a medical norm. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result.
Enter data and click Calculate.
The calculator uses the numbers you enter. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. In the first example the result is +10.5 hours.
The five form fields are Average sleep, Self-estimated sleep need, Nights under 6h in the past week, Long naps >45 min, and Difficulty waking / alarm snoozes. Weekly sleep debt means: This is the main result on this page. In the first example it is +10.5 hours. Average sleep means: The first form field. It enters the formula or sits beside the result. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. Self-estimated sleep need means: The second form field. The calculator is not a sleep study and does not set a medical norm.
The second example gives +3.5 hours. The third example gives +17.5 hours. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. In the first example the result is +10.5 hours.
The calculator is not a sleep study and does not set a medical norm.
Enter 6.5, 8, 3, 20, 4, then click Calculate. A comma in 12.5 is read the same way as a period. Fields on a 0-10 scale are notes and are not the primary result unless this page formula says so.
Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result.
In the first example the result is +10.5 hours. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result.
+10.5 hours
Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. In the first example the result is +10.5 hours.
+3.5 hours
Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. In the second example the result is +3.5 hours.
+17.5 hours
Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. In the third example the result is +17.5 hours.
In the first example the result is +10.5 hours. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result.
With the second set of fields the result is +3.5 hours.
With the third set of fields the result is +17.5 hours.
Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result.
The calculator is not a sleep study and does not set a medical norm.
This is the main result on this page. In the first example it is +10.5 hours. The first form field. It enters the formula or sits beside the result. Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. The second form field. The calculator is not a sleep study and does not set a medical norm.
Yes. 12.5 and 12,5 are read the same way.
No. Fields on a 0-10 scale are notes, unless this page formula counts marked items from them. The primary result comes from this page formula.
It is (need minus average sleep) × 7. A positive result is hours of debt; a negative result is spare hours versus the need you enter.
No. Short nights and naps sit beside the hours. The alarm note also does not change the result.
No. You enter the need yourself. The calculator is not a sleep study and does not set a medical norm.
(0) × 7 gives 0 hours of weekly debt.
Sleep and need in hours per night. Short nights as a night count, naps in minutes if the label says so.
Weekly sleep debt is (need minus average sleep) × 7. Short nights and naps sit beside those hours. The alarm note does not change the result. The calculator is not a sleep study and does not set a medical norm.
Page updated in 2026.
