Age in Seconds Calculator
See your age in seconds, minutes, hours, and days, plus a rough count of heartbeats and breaths.
How it works
Enter your birth date, and your birth time if you know it, to see how long you've been alive measured in seconds — plus the same total expressed in minutes, hours, and days.
The calculator finds the exact gap between your birth moment and right now, then converts it into each unit. Adding a birth time makes the seconds count sharper; leave it blank and it assumes midnight, which is close enough for the big picture.
For a bit of extra fun it also estimates your lifetime heartbeats and breaths using typical resting rates — around 70 beats and 15 breaths a minute. Those are ballpark figures, since your real rates rise and fall with sleep, exercise, and age.
Frequently asked questions
Do I have to enter a birth time?
No. If you leave it blank the tool assumes midnight. Adding your real birth time just makes the seconds figure a little more precise.
How are heartbeats and breaths estimated?
They're rough: the tool multiplies the minutes you've lived by typical resting rates of about 70 heartbeats and 15 breaths per minute. Your actual totals vary with activity and fitness.
Does the number keep ticking up?
It's calculated for the moment the page loads. Refresh the page to update it to the current second.