Age in hours, minutes and seconds
Add your time of birth if you know it to get your age in hours, minutes and seconds to the minute.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter date of birth, time of birth, age on this date and time on that date.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Minutes = (days between the dates × 1440) + (calculation time − birth time, in minutes). Hours = floor(minutes ÷ 60); seconds = minutes × 60.
Example
Inputs: Date of birth = 1990-05-15, Time of birth = 08:30, Age on this date = 2026-09-30, Time on that date = 12:00. Result: Age in hours: 318,891; Age in minutes: 19,133,490; Age in seconds: 1,148,009,400.
Limits and caveats
- Both times are assumed to be in the same time zone, and daylight saving shifts are not applied.
- Seconds are counted from the minute of birth, so they can be off by up to 59 seconds.
Questions about this tool
When will I be one billion seconds old?
11,574 days, 1 hour, 46 minutes and 40 seconds after birth, roughly 31 years and 8 months.
What if I do not know my birth time?
Leave it at 00:00 and the result is counted from the start of your birth day.
How many hours are in a year?
8,760 hours in a common year and 8,784 in a leap year.