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Days Between Dates Calculator

Total days, weeks and business days between two dates.

By CalcHub Editorial · Last reviewed

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

Worked example result
Total days30
In weeks and days4 weeks and 2 days
Business days in the period22

January 1 to January 31, 2026 is 30 days — 4 weeks and 2 days — containing 22 business days.

Diagram: how the Days Between Dates Calculator works — you enter Start year, Start month (1–12), Start day, End year, End month (1–12), End day; it applies the formula Total days = (end − start) in days; Business days = weekdays (Mon–F…; and the worked example gives Total days: 30.
How the Days Between Dates Calculator works — the inputs, the formula, and a worked example (Total days: 30).

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

Total days = (end − start) in days; Business days = weekdays (Mon–Fri) within the period

Worked example

January 1 to January 31, 2026 is 30 days — 4 weeks and 2 days — containing 22 business days.

Worked example for the Days Between Dates Calculator: with Start year 2026, Start month (1–12) 1, Start day 1, the result is Total days: 30; In weeks and days: 4 weeks and 2 days.
The worked example, with the example values entered and the results they give.

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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