Exact Age Calculator
Your age to the second
Give a birth date and time and get an age that keeps counting — years, months, days, hours, minutes and seconds, updating live.
Questions people ask
The things that come up about exact age calculators, answered plainly.
Why does my age in seconds not match another calculator?
Almost always a time-zone difference. An age to the second depends on the exact instant of birth; a calculator that assumes midnight UTC can be most of a day out.
What is the biggest round number coming up?
The page lists the next ones — a billion seconds, 10,000 days, 500 months. A billion seconds arrives at about 31 years and eight months, which is the one most people have never noticed passing.
Related tools
Exact ages, next birthdays, anniversaries and the odder age scales.
Age CalculatorYour age in years, months and days, worked out the way a birthday works — plus the totals in weeks, hours and seconds, and how long until the next one.
Seconds Between DatesThe count that Unix time itself is measured in — an exact second difference between two instants, with the millisecond, microsecond and nanosecond totals beside it.
Elapsed Time CalculatorPick a moment and watch the time since it climb, second by second. The page keeps ticking, so it works as a running clock on anything you have started.
Birthday CalculatorThe weekday you were born on, the weekday your next birthday falls on, your star sign, your zodiac animal, and how long there is to wait.