Age on a Date

How to use this tool

1. Load the example or enter your own values in the labeled fields.
2. Run the tool and review the result and assumptions.
3. Copy or download the result for your workflow.

Try this example

{"birth": "2000-06-15", "on": "2026-10-18"}

Accuracy and scope

Uses Gregorian calendar dates. Month-end anniversaries are clamped to the last day of the month.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.