Day Counter
Calculate the number of days between two dates, or add/subtract days from a date. Find workdays, weekends, and convert to weeks, months, and years.
Result
Days
30
1 month, 0 days
Calculator Mode
Select Dates
Results
Total Days
30
1 month, 0 days
Weeks
4.29
Months
0.99
Years
0.08
Hours
720
Workdays
23
Monday - Friday
Weekend Days
8
Saturday & Sunday
Quick Presets
Days in Common Time Periods
| Period | Days | Weeks | Hours |
|---|---|---|---|
| 1 Week | 7 | 1 | 168 |
| 1 Month (avg) | 30 | 4.3 | 720 |
| 1 Quarter | 91 | 13 | 2,184 |
| 1 Year | 365 | 52 | 8,760 |
| Leap Year | 366 | 52.3 | 8,784 |
| 1 Decade | 3,652 | 521.7 | 87,648 |
Result
Days
30
1 month, 0 days
Quick Answer
To count days between dates: subtract the earlier date from the later date. Our calculator counts all calendar days including start and end dates (or excluding, based on your preference). For business days, it excludes weekends. Example: January 1 to January 31 = 30 days (not counting start) or 31 days (counting both).
Key Facts
- Calendar days include weekends and holidays
- Business days exclude Saturday and Sunday (approximately 260 per year)
- Leap years have 366 days; regular years have 365
- One week = 7 days; One month = 28-31 days (avg 30.44)
- Days between Jan 1 and Dec 31 = 364 (same year)
- Include/exclude start or end date based on counting method
- Time zones can affect day counts when crossing midnight
- ISO 8601 week starts Monday; US convention starts Sunday
Frequently Asked Questions
Select "Days Between Dates" mode, enter your start and end dates. The calculator will show the total days, weeks, months, and years between them. You can choose whether to include the end date in the count.
Yes, the total days count includes all days. However, the calculator also shows workdays (Monday-Friday) and weekend days separately, which is useful for business calculations or project planning.
Use "Add Days" mode. Enter today's date (or any start date) and the number of days to add. The calculator will show the resulting date and all the time unit breakdowns.
A regular year has 365 days. A leap year has 366 days (occurring every 4 years, except century years not divisible by 400). This calculator accounts for leap years when calculating between dates.
Use "Days Between Dates" mode. Set your birth date as the start date and today as the end date. Include the end date for accuracy. The calculator shows your age in days, weeks, months, and years.
Workdays (also called business days) are Monday through Friday, excluding weekends. This calculator counts workdays separately from total days. Note that it doesn't account for holidays, which vary by region.
Result
Days
30
1 month, 0 days