Date Calculator
Calculate the duration between two dates or add/subtract days from a date.
How does this tool work?
Tool for time calculations, from the duration between appointments to deadline calculations.
In 'Calculate Duration' mode, you determine the exact distance between two dates in days, weeks, months, and years. The 'Date Add/Subtract' mode, on the other hand, allows you to add or subtract a specific period of time from a start date to quickly find target dates or deadlines.
Where are my data processed?
100% Client-Side: Your data never leaves your browser.
All calculations, conversions, encodings, and file processing of this tool are executed exclusively locally via JavaScript on your client device. No inputs, passwords, cryptographic keys, texts, or uploaded files are ever sent to our servers or third parties. Once the page is loaded, the tool remains completely functional even offline.