Wondering how old you are in years, months, and days? This free chronological age calculator instantly finds your exact age from your date of birth. Whether you’re checking your age for school records, legal forms, or curiosity, this accurate tool gives your age down to minutes and seconds.
Chronological age simply means the amount of time that has passed since you were born. It’s measured in years, months, and days, starting from your date of birth to the current or a specific date. In simple terms, it’s your “calendar age.”
People often confuse it with biological age or mental age, but those measure your body’s condition or cognitive development rather than the exact number of years you’ve lived.
This online chronological age calculator automatically subtracts your date of birth from today’s date (or a date you choose) and converts the difference into years, months, days, hours, minutes, and seconds. It’s a simple way to calculate your age in years months days without manual math.
If you want to know how to calculate chronological age by hand, here’s the basic chronological age formula:
Chronological Age = Current Date – Date of Birth
For example, if you were born on 10 March 1993 and today is 1 November 2025, you’re 32 years, 7 months, and 22 days old.
Your chronological age is fixed — it increases with time. But your biological age reflects how healthy your body is compared to your actual years, and your mental age relates to your intelligence level. Someone might be 40 years old chronologically but have the health or mind of someone much younger.
This tool isn’t just for people. You can also use it to calculate the age of a company, brand, or property — simply enter the date it was founded or built. It will tell you how old the entity is in exact years and months.
It’s 100% accurate for date differences, as it’s based on real calendar calculations. Just make sure you input the correct date of birth and target date.
Yes, this calculator works for any start date — whether it’s a person, company, or construction date.
Chronological age is your real time alive; biological age reflects your body’s physical condition, often influenced by lifestyle and genetics.
Any chronological age calculator that uses exact date subtraction (like this one) gives the most accurate age in years, months, and days.
Your chronological age is the foundation for everything — from legal identity to health tracking. This free online chronological age calculator helps you know your exact age anytime, anywhere.
Try it now — check your exact age in seconds and share it with friends or use it for your next application form!