Days Between Dates Calculator
The days-between-dates calculator counts the exact number of days between any two dates, and also shows the result in weeks, months, years and business days.
Last updated 2026-08-14
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quizExample
How this calculator works, with real numbers (no JavaScript needed):
Inputs
- Start date
- 2026-01-01
- End date
- 2026-08-14
Results
- Days between
- 225
- In weeks and days
- 32 weeks 1 day
- Whole weeks
- 32
- Remaining days
- 1
- Business days
- 162
- Approx. months
- 7.4
- Approx. years
- 0.6
functionsThe formula
Counting the days between two dates is a common need — for deadlines, project timelines, leave balances, notices, or simply "how many days until that trip?" This calculator gives you the precise calendar-day count plus a few handy breakdowns.
How the day count works
The calculator finds the exact difference in calendar days between the two dates, handling month lengths and leap years automatically. Enter the dates in either order — the result is always the absolute count.
Worked example
From 1 January 2026 to 14 August 2026:
- Days between = 225 days
- That's 32 weeks and 1 day
- Roughly 7.4 months or 0.6 years
- Business days (Mon–Fri) = 162
Weeks and business days
- Whole weeks + remaining days is the natural human way to think about medium-length gaps ("32 weeks and 1 day").
- Business days skip Saturdays and Sundays — the useful figure for work deadlines, court holidays, bank processing and delivery promises. Note it does not exclude public holidays, which vary by state; adjust manually if you need a fully holiday-free count.
Inclusive vs exclusive counting
If you need to count including both the start and end date (common for contracts: "5 days from 1 Jan" means 1–5 Jan), just add 1 to the result. For example, 1 Jan to 5 Jan is 4 days between, but 5 days inclusive.
helpFrequently asked questions
question_markHow many days are between two dates?
Enter the two dates in the calculator and it counts the exact calendar days between them, handling leap years and month lengths automatically.
question_markHow do I count business days between two dates?
This calculator counts Monday–Friday as business days. Public holidays vary by state and are not subtracted, so adjust for them if needed.
question_markHow many weeks is that in total?
The calculator divides the day count by 7 to show whole weeks, with the leftover days shown separately.