Days to Months Converter
Convert days to months. See results in months, weeks, hours, and a year/month/day breakdown. Includes a quick reference table with common durations.
TIME IN MONTHS
2.96 months
BREAKDOWN
2m 29d
WEEKS
12.9 wks
HOURS
2,160 hrs
FORMULA
90÷30.44
Days to Months — Quick Reference
| Days | Months | Weeks | Common Duration |
|---|---|---|---|
| 1 days | 0.03 mo | 0.1 wks | 1 day |
| 7 days | 0.23 mo | 1.0 wks | 1 week |
| 14 days | 0.46 mo | 2.0 wks | 2 weeks |
| 30 days | 0.99 mo | 4.3 wks | ~1 month |
| 60 days | 1.97 mo | 8.6 wks | ~2 months |
| 90 days | 2.96 mo | 12.9 wks | ~3 months (quarter) |
| 120 days | 3.94 mo | 17.1 wks | ~4 months |
| 180 days | 5.91 mo | 25.7 wks | ~6 months (half year) |
| 270 days | 8.87 mo | 38.6 wks | ~9 months (pregnancy) |
| 365 days | 11.99 mo | 52.1 wks | ~1 year |
| 548 days | 18.00 mo | 78.3 wks | ~1.5 years |
| 730 days | 23.98 mo | 104.3 wks | ~2 years |
How to Convert Days to Months
Divide the number of days by 30.4375 (the average number of days per month, calculated as 365.25 ÷ 12):
Example: 90 days
= 90 ÷ 30.4375 = 2.96 months (~3 months)
Example: 365 days
= 365 ÷ 30.4375 = 11.99 months (~1 year)
Example: 180 days
= 180 ÷ 30.4375 = 5.91 months (~6 months)
Note: Calendar months vary from 28 to 31 days. The 30.4375-day average accounts for this variation, including leap years.
Days to Months — Conversion Table
| Days | Months | Weeks | Common Reference |
|---|---|---|---|
| 1 day | 0.03 mo | 0.1 wk | 1 day |
| 7 days | 0.23 mo | 1.0 wk | 1 week |
| 14 days | 0.46 mo | 2.0 wks | 2 weeks |
| 30 days | 0.99 mo | 4.3 wks | ~1 month |
| 60 days | 1.97 mo | 8.6 wks | ~2 months |
| 90 days | 2.96 mo | 12.9 wks | ~1 quarter |
| 120 days | 3.94 mo | 17.1 wks | ~4 months |
| 180 days | 5.91 mo | 25.7 wks | ~6 months (half year) |
| 270 days | 8.87 mo | 38.6 wks | ~9 months |
| 365 days | 11.99 mo | 52.1 wks | ~1 year |
| 548 days | 18.00 mo | 78.3 wks | ~1.5 years |
| 730 days | 23.98 mo | 104.3 wks | ~2 years |
Days Per Month — Calendar Reference
| Month | Days | Notes |
|---|---|---|
| January | 31 | |
| February | 28 or 29 | 29 in leap years (2024, 2028, 2032) |
| March | 31 | |
| April | 30 | |
| May | 31 | |
| June | 30 | |
| July | 31 | |
| August | 31 | |
| September | 30 | |
| October | 31 | |
| November | 30 | |
| December | 31 | |
| Average | 30.4375 | 365.25 ÷ 12 |
Common US Durations in Days
| Duration | Days | Months | Context |
|---|---|---|---|
| 30-day notice | 30 | ~1 mo | Landlord notice, credit card billing |
| 60-day return window | 60 | ~2 mo | Many electronics retailers |
| 90-day probation | 90 | ~3 mo | New job trial period |
| FMLA leave | 84 | ~2.8 mo | Up to 12 weeks unpaid leave |
| 180-day deployment | 180 | ~6 mo | Military deployment |
| US passport processing | 42–56 | ~1.5–1.8 mo | Routine processing time |
| Pregnancy | 280 | 9.2 mo | 40 weeks from last period |
| Car warranty | 1,095 | 36 mo | Typical 3yr/36k miles |
| Statute of limitations | 730–2,190 | 24–72 mo | Varies by state and claim type |
US Fiscal Quarters
| Quarter | Months | Days | Tax/Business Use |
|---|---|---|---|
| Q1 | Jan–Mar | 90 days (91 in leap year) | IRS quarterly estimated taxes due Apr 15 |
| Q2 | Apr–Jun | 91 days | Due Jun 15 |
| Q3 | Jul–Sep | 92 days | Due Sep 15 |
| Q4 | Oct–Dec | 92 days | Due Jan 15 (next year) |
What Is a Day?
A day is a unit of time equal to 24 hours, 1,440 minutes, or 86,400 seconds. It corresponds to one full rotation of the Earth on its axis. In the US, a "business day" typically refers to Monday–Friday, excluding federal holidays.
What Is a Month?
A month is a unit of time based on the lunar cycle, averaging 30.4375 days (365.25 ÷ 12). Calendar months range from 28 to 31 days. In legal and financial contexts in the US, a "month" usually means a calendar month (e.g., January 15 to February 15), not exactly 30 or 30.44 days.