CALCULATE · VISUALIZE · EXPLORE

Date Difference Calculator

Find calendar days and weeks between two dates.

● Live results · Runs on your device · No sign-up

Your inputs

Counts elapsed calendar days, excluding the end date; negative means the end precedes the start.

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UNDERSTAND YOUR RESULTS

Date Difference Calculator guide

Find calendar days and weeks between two dates.

How to use this tool

Enter Start date, End date.
Change a value to update the results and illustration. Check any validation message before using the output.
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.

How it works

Counts elapsed calendar days, excluding the end date; negative means the end precedes the start.

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.