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Date Difference Calculator

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Counts elapsed calendar days, excluding the end date; negative means the end precedes the start. Business days count the Mondays to Fridays inside the span on the same basis.

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Result visualization

Find the exact calendar days and weeks between two dates — with a years, months and days breakdown, a Monday-to-Friday business-day count and a count that includes both endpoints — free and instant, no signup.

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UNDERSTAND YOUR RESULTS

Date Difference Calculator guide

Find the exact calendar days and weeks between two dates — with a years, months and days breakdown, a Monday-to-Friday business-day count and a count that includes both endpoints — free and instant, no signup.

How to use this tool

  1. Enter Start date, End date.
  2. Change a value to update the results and illustration. Check any validation message before using the output.
  3. Copy the results or download CSV. Reset restores the example values.

A worked example

January 1 to February 1, 2026 is 31 elapsed calendar days. Including both endpoints counts 32 dates. The breakdown reads 0 years, 1 month, 0 days, and 22 of those days are business days (Mondays to Fridays, end date excluded). From 31 January 2025 to 1 March 2026 the breakdown is 1 year, 1 month, 1 day across 394 calendar days, 281 of them business days.

What you can do with this tool

How it works

Counts elapsed calendar days, excluding the end date; negative means the end precedes the start. Business days count the Mondays to Fridays inside the span on the same basis.

Frequently asked questions

How should I interpret the illustration?

It is a visual aid, not a replacement for the numeric output. Some charts compare values with different units, and those magnitudes are not directly comparable.

Can I use the result without checking the inputs?

Check units, signs, assumptions and rounding first. The tool cannot know whether the values you enter describe the real situation correctly.