Age calculator
Count completed years between a birth date and an explicitly selected review date.
Age calculator: inputs, results and limitations
Count completed years between a birth date and an explicitly selected review date.
How to use Age calculator
- Paste your text or use the example to inspect the operation.
- Review the options before running: Birth date: 2000-01-01 · Review date: 2026-10-09
- Inspect the preview or result, then download a new file.
An illustrative use case
A birth date compared with a chosen review date.
Select a real sample file you are allowed to process. Begin with a short, simple input before attempting a complex document or recording.
What to inspect in the output
Enter calendar dates rather than timestamps. Check whether the birthday has occurred in the review year and reject impossible dates rather than rolling them into another month.
Where this tool stops
Review the output before using it. Your original input is not changed.
Settings and starting values
| Control | Starting value |
|---|---|
| Birth date | 2000-01-01 |
| Review date | 2026-10-09 |
Troubleshooting Age calculator
Check units, date formats and the order of operands. A valid number can still represent the wrong quantity, such as milliseconds instead of seconds or a monthly rate instead of an annual percentage.
Questions about Age calculator
Is this an official age verification system?
No. It calculates from the dates supplied and does not verify a person or establish legal eligibility.
What input does Age calculator need?
Use the sample text shown below, then replace it with your own input. Review the result for the destination where it will be used.
Which options does Age calculator provide?
Birth date, Review date. Review the starting values in the table and adjust them for your input.
Your original input is preserved. Review the new output before using it in a published page, customer delivery or production workflow.
JavaScript enables the interactive workspace.