Results
Public holidays are country-wide only (regional/state holidays aren't included yet).
Start and end order doesn't matter - reversed dates return negative values.
Months use an average length for speed. Use day totals for exact results.
Holiday calendars are cached locally for speed.
Date calculations are timezone-independent.
Learn more
Need help choosing inclusive vs exclusive counting? Read Inclusive vs Exclusive Date Differences for real-world examples.
What this tool does
Calculates the gap between two dates in multiple units, optionally counting inclusively, business days only, or skipping public holidays. It is quick sanity-check math for timelines so you do not have to build helper columns in a spreadsheet.
Everything runs locally, so tweaking the options instantly redraws the summary cards.
How it works
- Pick your start and end dates or tap "End = Today" for current status reports.
- Use Inclusive counting if you want to treat both endpoints as full days (classic Gantt-style).
- Enable Business days to restrict the math to Monday-Friday.
- Select a holiday calendar when you need to skip public holidays for a specific country.
- Read the summary tiles for days, weeks, months, and business-day totals immediately.
Common use cases
- Figuring out how many working days remain before a launch date.
- Reporting how long an incident has been open.
- Calculating notice periods, leave balances, or sabbatical windows.
- Tracking warranty age or service intervals for equipment.
- Answering "How old is this?" without diving into Excel.
- Planning travel itineraries that span multiple weeks.
FAQ
Does the order of the dates matter?
No. If you reverse them, the result just shows a negative duration so you can see direction.
What does Inclusive mean?
It counts both the start and end dates as full days, which matches how many HR and legal documents define durations.
Which holiday calendars are available?
The dropdown includes common national calendars (US, UK, EU countries, AU, CA). More regions can be added later.
Are regional/state holidays included?
Not yet. The tool only skips nationwide public holidays listed in the selected calendar.
How accurate are "months"?
Months are using averaged lengths to stay fast. If you need exact counts, compare months manually or use day totals.
Does timezone matter?
No. The calculation treats dates as calendar days without applying offsets, so it's consistent globally.