Accurately Age Calculator Tool.
Age Calculator Age Calculator Enter your date of birth: Calculate Age To use this age calculator, follow these steps: Open the HTML file in a web browser. Select the date of birth using the input field. Click on the "Calculate Age" button. The age of the person will be displayed below the button. Note that the date of birth entered should be in the format "YYYY-MM-DD". Also, make sure that the date entered is valid, i.e., not a future date. If an invalid date is entered, the calculator will display an error message.