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A contract says "respond within 10 business days." An invoice says "Net 30." Shipping says "5-7 business days." How many actual calendar days is that? And what exact date is the deadline? Enter your dates and find out.
Enter dates — see business days (weekdays only), calendar days, and weeks.
Open Date Calculator| Business Days | Calendar Days (approx) | Weeks | Common Use |
|---|---|---|---|
| 5 | 7 | 1 week | Standard work week |
| 10 | 14 | 2 weeks | Two-week notice, short deadlines |
| 15 | 21 | 3 weeks | Standard processing time |
| 20 | 28 | 4 weeks | One month of working days |
| 30 | 42 | 6 weeks | Extended processing |
| 45 | 63 | 9 weeks | Government processing |
| 60 | 84 | 12 weeks | Major deadlines, FMLA leave |
| 90 | 126 | 18 weeks | Quarterly business deadlines |
| Month | Business Days | Total Days |
|---|---|---|
| January | 21 | 31 |
| February | 20 | 28 |
| March | 22 | 31 |
| April | 22 | 30 |
| May | 21 | 31 |
| June | 22 | 30 |
| July | 23 | 31 |
| August | 21 | 31 |
| September | 22 | 30 |
| October | 22 | 31 |
| November | 21 | 30 |
| December | 23 | 31 |
Counts exclude federal holidays. Your actual working days depend on which holidays your organization observes.
| Context | Usually Means | Example |
|---|---|---|
| Invoice terms (Net 30) | Calendar days | 30 calendar days from invoice date |
| Shipping estimates | Business days | 5-7 business days = 7-9 calendar days |
| Legal filing deadlines | Depends — read carefully | Some courts use calendar, others business |
| Return policies | Calendar days | 30-day return = 30 calendar days |
| Employment notice | Calendar days | 2-week notice = 14 calendar days |
| Government processing | Business days | Allow 6-8 weeks = 30-40 business days |
Count business days between any two dates — instant, free, no signup.
Open Date Calculator