Date Range Calculator

Use this calculator whenever the exact counting method matters—whether boundary dates count toward a total, and whether you need both a calendar-day and business-day figure for the same range.

Enter a start date and end date, then choose whether to include the start and end boundaries. Inclusive counting includes selected boundary dates; exclusive counting removes selected boundaries before totals are calculated.

Calendar days are always shown for the selected range method. You can optionally show business-day totals for the same adjusted range, with weekend exclusion and optional sample US federal holiday exclusion.

Start date: 1 March 2025. End date: 31 March 2025. Both boundaries included.

Calendar days (inclusive): 31 days.

With both boundaries excluded instead, the calendar-day total drops to 29 days.

Business-day total for the same inclusive range (weekends excluded, no holidays): 21 business days.

The Business Days vs Calendar Days Guide explains when weekends and holidays count and which day type applies to deadlines, invoices, and contracts.

The How Business Days Are Calculated Guide and Business Days Between Dates Guide cover the counting rules behind every business-day tool on this site.

The Business Days Calculator and Working Days Calculator count weekdays between two known dates, excluding weekends and optional US federal holidays.

The Add Business Days To Date, Subtract Business Days From Date, and Business Day Offset calculators move a single date forward or backward by a business-day count.

The Business Days Until Date Calculator counts business days remaining from today or a custom date to a target deadline.

The Days Between Dates Calculator counts every calendar day between two dates, including weekends—use it instead of the business-day tools when weekends should count.

The Date Range Calculator and Date Duration Calculator break a range into calendar-day totals or a years/months/days breakdown, with inclusive or exclusive boundary options.

The Add or Subtract Days Calculator shifts a single date forward or backward by days, weeks, or months.

The Age Calculator applies the same calendar breakdown used by Date Duration to a birth date, expressed as years, months, and days.

The Hours Between Dates and Date Difference calculators measure elapsed time between two date-times down to hours, minutes, and seconds.

The Date Format Converter, Unix Timestamp Converter, and Timezone Converter handle format and zone conversion for a single instant rather than a span between two dates.