Calculate Average Date

Want to find the midpoint between several calendar dates? The Calculate Average Date Tool takes a list of YYYY-MM-DD formatted dates and calculates their average. Whether you’re analyzing project phases, birthdate data, or historical spans, this tool gives you an exact middle date instantly and accurately.

You can type or paste dates directly into the input box, or upload them from a file. The result updates automatically as you go.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .log
Total dates: 0

How to Use:

  1. Enter one calendar date per line in YYYY-MM-DD format into the Input Dates box.
  2. Or use the Choose File button to upload a .txt, .csv, or .log file with one date per line.
  3. The Average Date box will update instantly.
  4. Click Copy Output to copy the result or Export to File to download it.
  5. Use Clear All to reset the form.

What Calculate Average Date Tool can do:

  • Computes the midpoint between multiple calendar dates
  • Supports direct input and file imports
  • Filters out blank and invalid lines automatically
  • Displays the result in ISO format (YYYY-MM-DD)
  • Offers live updates, copy, and export features
  • Shows total number of valid dates used in the calculation

Example:

Input:

2024-01-01
2024-06-15
2024-12-31

Output:

2024-06-14

Common Use Cases:

This tool is ideal for averaging registration dates, calculating the midpoint of project timelines, estimating central dates from datasets, or performing quick checks across any group of valid dates. It’s especially useful for reports, analytics, or scheduling calculations where a central average is more meaningful than just the earliest or latest.

Useful Tools & Suggestions:

If you’re comparing spans, Find Date Difference helps you measure the gap between key points. And to crunch more values, Calculate Calendar Sum gives you a way to total things before averaging.

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