Days Between Dates Calculator
Total days, weeks and business days between two dates.
Quick answer
- Formula: Total days = (end − start) in days; Business days = weekdays (Mon–Fri) within the period
- Worked example — Total days: 30 (full example below).
Days Between Dates Calculator
| Total days | 30 |
| In weeks and days | 4 weeks and 2 days |
| Business days in the period | 22 |
January 1 to January 31, 2026 is 30 days — 4 weeks and 2 days — containing 22 business days.
Count the days between any two dates: the total day count, the same span expressed in weeks and remaining days, and how many of those days are business days (Monday to Friday).
Business days are counted across the period that starts on the start date and runs for the total number of days shown — the same convention as adding that many days to the start date.
The formula
Worked example
January 1 to January 31, 2026 is 30 days — 4 weeks and 2 days — containing 22 business days.
The example is pre-loaded in the result panel — press Calculate with your own numbers to replace it.
Frequently asked questions
Are holidays counted as business days?
Public holidays are not subtracted, because they differ by country and year. Only Saturdays and Sundays are treated as non-business days.
Why is the count the difference and not difference + 1?
This measures elapsed time between the dates, like a stopwatch. If you need an inclusive count of every calendar day touched, add 1 to the total.
Category: Date & Time calculators
Sources & methodology
This calculator applies the formula shown on this page exactly as written, using the standard definitions for its inputs. Results are computed from the values you enter — no data is stored — and are rounded only for display.
Content last reviewed by CalcHub Editorial.
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