Date Calculator

The Date Calculator helps you figure out how many days separate two dates, or what the date will be after adding or subtracting a number of days. It’s fast, flexible, and loaded with practical features perfect for planning timelines, tracking deadlines, or backdating documents.

You can calculate the difference between two dates, or start with a single date and either add or subtract a specific number of days. Need to skip weekends? Want to count the start date or format results more cleanly? This tool gives you switches for all that.

Whether you’re scheduling events, checking delivery windows, or just curious about time spans, the Date Calculator does the math and shows the results instantly.

Options
Use verbose output
Include start date
Include weekends

How to Use:

  1. Choose a Mode:
    • Date Difference: Calculates days between a start and end date.
    • Add Days: Moves forward from a date by a set number of days.
    • Subtract Days: Goes backwards instead.
  2. Enter Your Values:
    • Start Date is required in all modes.
    • End Date appears only for Date Difference mode.
    • Days field appears only for Add/Subtract.
  3. Use the Toggles:
    • Use verbose output shows dates as “March 5, 2025.”
    • Include start date counts the starting day if checked.
    • Include weekends when unchecked, weekends are skipped.
  4. Click Calculate or just type the output updates live and flashes so you know it’s fresh.
  5. Copy, Export, or Reset using the buttons below.

What Date Calculator can do:

This tool gives you full control over date math. You can count days with or without weekends, toggle the starting day, and choose how you want your results to look. It’s built to handle both quick lookups and more detailed planning scenarios. Whether you need to know when something is due, when to start a countdown, or how long a task should take it’s ready.

Example:

Mode: Add Days
Start Date: 2025-06-01
Days: 10
Include weekends: Off

Start: June 1, 2025
Days added: 10
Result Date: June 13, 2025

Common Use Cases:

You might use this to track business days for a contract, calculate how many working days are left in a project, or determine when to start preparing for an event. The Date Calculator is your go-to tool for answering “when” with accuracy and clarity.

Useful Tools & Suggestions:

If you’re adding or subtracting dates, the Days Calculator gives you tighter control when you want to work in exact day units. And when you’re curious about what that all adds up to, the Date Duration Calculator shows the full span with both words and numbers.

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