Convert days to weeks and months for planning and scheduling.
Convert days to weeks using the universal standard conversion factor of 1 week = 7 days.
Convert days to weeks and months for planning and scheduling.
Convert days to weeks using the universal standard conversion factor of 1 week = 7 days.
Exact for weeks. Months vary (28-31 days), so use average of 30.44 days per month for approximations.
Common mistake: Assuming all months have 30 days. Months vary from 28-31 days, so using 30 days for all months leads to inaccuracies. Also, forgetting that weeks are exactly 7 days, not 5 or 6 working days.
| Item | Days | Weeks/Months |
|---|---|---|
| Week | 7 | 1 week |
| Month | 30 | 4.29 weeks |
| Quarter | 91 | 13 weeks |
| Year | 365 | 52.14 weeks |
| Leap year | 366 | 52.29 weeks |
There are 7 days in a week.
Months vary: 28-31 days. Average is about 30.44 days.
The universal standard defines 1 week as exactly 7 days.
There are approximately 52.14 weeks in a non-leap year (365 days ÷ 7).
The modern calendar is based on the Roman calendar, which originally had 10 months. Later adjustments added January and February, resulting in the varying month lengths we use today.
30 days equals approximately 4.29 weeks.
Last Updated: 2026 · Reviewed by the UnitFig editorial team