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Fill in the details and click Calculate to see your results.
📘 About the Date Calculator
Date arithmetic is surprisingly fiddly: months have different lengths, leap years add a day, and deadlines often count only working days. This calculator handles all of that — for notice periods, due dates, project plans, visa stays, warranty periods and countdowns.
Choose ‘between’ to count the time between two dates in days, weeks, months, years and working days, or ‘add’ to move forward or back from a date by any mix of years, months, weeks and days (or working days only). Leave the start date empty to use today.
🧮 Formula
✏️ Worked examples
Independence Day to Republic Day
You get| Time between the dates | 164 days |
| In years, months and days | 0 years, 5 months, 11 days |
| In weeks | 23 weeks 3 days |
| In months | 5.3614 months |
| Working days (Mon–Fri) | 116 · weekend days 48 |
| In hours · minutes | 3,936 · 236,160 |
| From → to | Saturday, 15 August 2026 → Tuesday, 26 January 2027 |
| End date counted? | No |
164 days.
90 days from 1 January 2027
You get| Result | Thursday, 1 April 2027 |
| Start date | Friday, 1 January 2027 |
| Change | Adding 90 days |
| Days apart | 90 days |
| Day of the year | 91st day of 2027 |
Thursday, 1 April 2027.
🧭 How to use this calculator
What you enter
- Calculate
- Start date
- End date
- Include the end date?
- Add or subtract
- Years
- Months
- Weeks
- Days
- Count only working days (Mon–Fri)?
What you get
- Time between the dates
- In years, months and days
- In weeks
- In months
- Working days (Mon–Fri)
- In hours · minutes
- From → to
- End date counted?
❓ Frequently asked questions
How do I count days between two dates?
Subtract the dates; the calculator does it for you. Choose ‘include the end date’ if both the first and last day should count (like leave days).
What date is 90 days from today?
Leave the start date empty, choose Add and enter 90 days.
Does it skip public holidays?
No — working days skip weekends only. Subtract holidays for your country yourself.
