ToolPronto
Calculate days and calendar dates
Count a date range or move a date without spreadsheet formulas.
Date Calculator
Choose a calendar calculation
Result
0 complete weeks; 0 remaining days
The dates are the same.
What the date calculator counts
The date calculator counts calendar days or Monday-to-Friday weekdays between ISO calendar dates, or adds and subtracts calendar units. UTC calendar arithmetic prevents daylight-saving changes from adding or removing a day.
Common date calculations
- Count the days until or since a trip, event, or project milestone.
- Estimate weekdays while deliberately excluding only weekends.
- Find the date a number of days, weeks, months, or years away.
How to calculate dates
- Choose days between, weekdays, or date addition and subtraction.
- Enter the dates and select whether the final day is included.
- Read the calendar-safe result and its active counting rule.