Frequently asked questions
How accurate is this age calculator?
It is fully accurate — it accounts for leap years, different month lengths, and calculates your exact age down to the day. If you enter your birth time, it calculates to the second.
How many days have I lived?
The calculator shows your exact number of days lived. For example, a 25-year-old has lived approximately 9,125 days depending on leap years.
How is the heartbeat count calculated?
The average human heart beats about 72 times per minute. We multiply this by the number of minutes you have been alive to estimate total heartbeats. It is an approximation based on average resting heart rate.
Can I use this to calculate someone else's age?
Yes, simply enter their date of birth. Many people use this for their children, parents, or to calculate age for official documents.
Is my data stored anywhere?
No. Everything runs in your browser. Your date of birth is never sent to any server. ToolStreet does not store, track, or share any personal information.