# Date Calculator

> Calculate the duration between two dates or add/subtract days from a date.

- Open in browser: https://pockettoolbox.org/en/date-calculator
- Runs entirely in your browser; files and input are never uploaded.

## How it works

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.

Computes date differences using millisecond timestamps. Account for varying month lengths and leap years during month and year calculations.

## FAQ

### How many days are between two dates?

Pick a start and end date and the calculator shows the duration in days right away. You can also add or subtract days from a date.

## Popular tasks

- [Days Between Two Dates](https://pockettoolbox.org/en/days-between-dates)

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PocketToolbox (https://pockettoolbox.org/en)