Exact Age Calculator

An exact age calculator computes your precise age in years, months, days, hours, and even seconds from your date of birth to the current moment. This is more complex than it appears because months vary in length (28–31 days) and leap years add an extra day every 4 years

The calculator uses the standard published formula for exact age. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.