Date Time Calc LT
Smart date math in a click
Only for Mac
Free · In‑App Purchases
Mac
The best Date Time Calculation application ever
Date Time Calc
Fast, reliable date and time calculations for professionals and power users. Add or subtract intervals, compare two dates, and get precise differences down to seconds—always formatted using your Mac’s locale and calendar settings.
Examples
• Add 150 days to today
• Difference in years, months, and days between 25 March 2009 and today
• Precise gap from last Monday 09:55:30 to next Friday 11:07:15
• Time from now to 10 December next year at 12:00 PM
Easy to use
• “Natural” inputs: years, months, days, weeks, hours, minutes, seconds
• Calendar Date mode (add/subtract Y/M/D)
• Time Precision mode (add/subtract days/hours/minutes/seconds)
• No Calculate button—results update instantly as you edit
• Clear textual summary under the fields
• One-click “Set to Now” for quick what-ifs
• Standard macOS date & time controls you already know
Features
• Live results as you type
• Differences shown with natural components (Y/M/D/W/H/M/S)
• Weeks supported for totals and differences
• Copy results as plain text
• Locale-aware date/time display and language
• Add or subtract intervals (past and future)
• Optional inclusion of hours, minutes, seconds for maximum precision
• Persistent log to keep your calculations across relaunches
• Reset the log at any time
• Built on Apple’s date/time frameworks for accuracy and calendar correctness
• Built-in PDF User Guide (Help menu)
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Redesigned, simpler and cleaner interface
Clear graphical distinction between Date 1, Interval, Date 2
Visual indicators when changing dates or intervals
Visual feedback of automatic calculations during editing
Clearer and more readable results
Customizable font size for results
3 different result formats (composed, days, weeks)
Editable log with option to add your own text
Improved calculations
Copyable log
Various bug fixes
The developer, Roberto Panetta, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Roberto Panetta
- Size
- 2.1 MB
- Category
- Utilities
- Compatibility
Requires macOS 10.13 or later.
- Mac
Requires macOS 10.13 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Date Time Calc Plus License $5.99
- Copyright
- © 2011-2025 Ecleti - Roberto Panetta