Calendar breakdown, total days, weeks, business days between two dates. Free, private, runs in your browser.
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A date range can be described as a duration (1 year 3 months 14 days) or as a total (104 days, 14 weeks and 6 days). Both are useful for different questions. Durations are what calendars and contracts use. Totals are what project planning and health tracking use (days-since-last-injury, weeks-on-a-diet, hours-until-exam). This calculator shows both, plus raw weeks and business days.
The business-day count includes every Monday, Tuesday, Wednesday, Thursday, and Friday between the start date (inclusive) and the end date (exclusive). Useful for delivery SLAs, payroll windows, and contract deadlines where weekend days don't count. Public holidays are not deducted — holiday lists are per-country and would need a configuration layer we've deliberately kept out of the v1. For country-specific working-day math, subtract holidays in your range manually.
The calendar breakdown respects actual month lengths: February gets 28 or 29 days depending on the year; April, June, September, November have 30; the rest have 31. The totals (total days, total hours) are computed from the raw timestamp difference, so they're always exact regardless of calendar irregularities. If you span a leap day, it's counted.
If the end date precedes the start date, the calculator shows an absolute difference but tags the direction as 'backward' so you can tell at a glance. Most tools silently swap the inputs; we prefer to show what the user entered and call out the unusual case. Useful when computing 'days since' versus 'days until' using the same interface.
Dates you enter stay in your browser. No tracking, no account. Useful for anything from tax deadlines to anniversaries to medical-record timelines you'd rather not expose to a third-party service.
Monday through Friday between the start date (inclusive) and end date (exclusive). Public holidays aren't subtracted — holiday lists vary by country and would require a configuration layer we've kept out of the v1. For US / UK-specific working-day needs, reduce the business-day count manually for any holidays in the range.
The calendar breakdown uses actual month lengths: if you span Jan-Feb, the February portion is 28 or 29 days depending on whether it's a leap year. Total-days, total-weeks, and total-hours are computed from the raw timestamp difference, so they're always exact.
If you put the end date before the start date, the calculator shows an absolute difference but tags it 'backward' so you don't misread a negative time gap as a mistake. Most tools silently flip the inputs — we prefer to show what the user entered.