Fast, responsive, and feature-rich
Calculate Duration
Add / Subtract Duration
How This Tool Helps You & Its Benefits
Whether you are a freelancer tracking billable hours, a project manager estimating deadlines, or simply someone who wants to know how many days are left until a vacation, this Time Duration Calculator is built for you.
Key Features
- Instant & Accurate: Calculates the exact difference between two date-times down to the second.
- Work-Day Mode: Exclude weekends and specify custom work hours to get true business-day results.
- Add & Subtract Durations: Quickly shift a date forward or backward by any unit you choose.
- Mobile First: Runs buttery-smooth on phones, tablets, and desktops with a responsive layout.
- SEO Optimized: Clean semantic HTML + minimal JS ensures lightning-fast load times and great search rankings.
Benefits
- Saves Time: No manual counting or spreadsheet formulas—get results in one click.
- Reduces Errors: Automatic handling of leap years, daylight-saving changes, and locale formatting.
- Better Planning: Exact duration helps in setting realistic milestones and budgets.
- Offline Capable: Once loaded, the tool works even without an internet connection.
Bookmark this page and use it anywhere, anytime—your reliable partner for all date and time calculations!