Day Counter — Count Days Between Dates or From Today
Count the number of days between two dates, days until an event, or days since a past date. Includes business days, weekends, and custom date calculations.
"How many days until my birthday?" "How many days since I started this job?" "How many business days between these two dates?" The CalcHub Day Counter answers all of these instantly.
Days Between Two Dates — Quick Reference
| From | To | Days |
|---|---|---|
| January 1 | March 31 | 90 (91 in leap year) |
| January 1 | June 30 | 181 (182 in leap year) |
| January 1 | December 31 | 365 (366 in leap year) |
| April 1 | September 30 | 183 |
| Start of Q1 (Jan 1) | End of Q1 (Mar 31) | 90 |
| Start of Q2 (Apr 1) | End of Q2 (Jun 30) | 91 |
Days in Each Month
| Month | Days | Cumulative (from Jan 1) |
|---|---|---|
| January | 31 | 31 |
| February | 28 (29 leap) | 59 (60) |
| March | 31 | 90 (91) |
| April | 30 | 120 (121) |
| May | 31 | 151 (152) |
| June | 30 | 181 (182) |
| July | 31 | 212 (213) |
| August | 31 | 243 (244) |
| September | 30 | 273 (274) |
| October | 31 | 304 (305) |
| November | 30 | 334 (335) |
| December | 31 | 365 (366) |
Common Countdown Reference (from March 27, 2026)
| Event | Date | Days Away |
|---|---|---|
| April Fool's Day | April 1, 2026 | 5 |
| Independence Day (India) | August 15, 2026 | 141 |
| Diwali 2026 | October 20, 2026 (approx) | 207 |
| Christmas | December 25, 2026 | 273 |
| New Year 2027 | January 1, 2027 | 280 |
| Republic Day 2027 | January 26, 2027 | 305 |
Business Days vs Calendar Days
Business days exclude weekends (Saturday and Sunday) and optionally holidays:
| Calendar Days | Approx Business Days | Formula |
|---|---|---|
| 7 | 5 | 1 week |
| 14 | 10 | 2 weeks |
| 30 | ~22 | 1 month |
| 60 | ~43 | 2 months |
| 90 | ~64 | 3 months / 1 quarter |
| 180 | ~128 | 6 months |
| 365 | ~261 | 1 year |
This matters for: contract deadlines, notice periods, shipping estimates, project timelines, and legal filings.
Use Cases
Project Planning
"The deadline is 45 business days from today." 45 business days ≈ 63 calendar days (45 × 7/5) ≈ about 9 weeks.Notice Periods
"My notice period is 90 days." 90 calendar days from March 27 = June 25. If it's 90 business days, that's approximately 126 calendar days = August 1.Age in Days
Average person lives approximately 27,375 days (75 years × 365.25)| Age | Days Lived |
|---|---|
| 10 years | ~3,652 |
| 18 years | ~6,575 |
| 25 years | ~9,131 |
| 30 years | ~10,957 |
| 50 years | ~18,262 |
| 75 years | ~27,394 |
| 100 years | ~36,525 |
Interest Calculations
Simple interest for exact days: SI = P × R × Days / (100 × 365)₹1,00,000 at 8% for 45 days = 1,00,000 × 8 × 45 / (100 × 365) = ₹986
How to Use the Calculator
- Open the CalcHub Day Counter
- Enter start date and end date (or select "from today")
- Toggle include/exclude weekends and holidays
- See: total days, business days, weeks, months breakdown
Is the start date or end date included in the count?
Convention varies. "Days between" typically excludes both endpoints (March 1 to March 5 = 4 days). "Days from" typically includes the start (March 1 counting 5 days = March 5). The calculator lets you choose.
How do I calculate age in exact days?
Enter your birth date as the start date and today as the end date. The calculator shows years, months, and exact days. You can also use the Age Calculator for a more detailed breakdown.
What's a "Julian day"?
January 1 = day 1, December 31 = day 365 (or 366). March 27 = day 86. Julian days are used in astronomy, agriculture, and some logistics systems.
Related Calculators
- Date Difference Calculator — detailed date calculations
- Age Calculator — exact age from birthdate
- Time Calculator — hours, minutes, seconds
- Hours Calculator — work hours tracking