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Date Calculator
Find out how long until a deadline, how many working days a project has, or what date it will be in 90 days.
Free, no sign-up. Runs in your browser: nothing is uploaded.
How to use Date Calculator
- Choose “Between dates” or “Add / subtract”.
- Enter the dates or amount.
- Read the result in several units.
Features
- Years, months, weeks and days
- Business days (Mon–Fri)
- Add or subtract days, weeks, months, years
- Weekday and week number
Private by design
Everything you type is calculated by your browser on this device. Nothing is sent to openWorkstand or anyone else, so the Date Calculator is safe for private and work data, and it keeps working offline once the page has loaded. How local processing works
When to use the Date Calculator
- Count the days until a deadline.
- Add 90 days to a contract date.
- Count business days for a project plan.
Frequently asked questions
Is the end date included?
By default, no, like most calendars. Turn on “Include end date” to count both days.
Keep working with the result
openWorkstand also includes a free workspace with documents, spreadsheets, tasks, projects and a calendar that save to a folder on your computer.
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