How to interpret this estimate

Estimate age as of the current date. Uses the current date in the user's browser and a Gregorian calendar date of birth.

When this result is useful

Use it to calculate completed years and approximate days lived as of the current date.

Common limitations

Completed years decrease by one when the birthday has not yet occurred in the current year. Time zone differences can shift the displayed reference date by one day near midnight.

This calculator uses the selected inputs and the fixed formula behind the tool to produce an estimate. Review the units, assumptions, and result labels before using the output for planning.

Health results are screening or planning estimates only. They do not diagnose health status or replace advice from doctors, dietitians, or qualified healthcare professionals.

Read the medical disclaimer for more context.