Time addition
Summarize hours, minutes and seconds online
to instantly get the amount
Time addition calculator
⌛ How to add time (hours, minutes, seconds)
Our smart calculator does what a regular phone calculator can't do: it adds up time intervals, taking into account that there are 60 minutes in an hour, not 100.
In what situations is this needed?
📈 For work (Time management)
Add up the time spent on different tasks in a week to complete a report or bill a client for hours of work.
🎬 For video editing
Find out the total duration of a playlist or video by adding up the timing of several fragments (for example: 12 min 30 sec + 4 min 45 sec).
✈️ For trip planning
Calculate your net travel time by adding up the duration of flights and transfers.
If you just need to convert hours to minutes or seconds (without addition), use our time converter.
Frequently asked questions (FAQ)
🔹 Why does the calculator show “1 day” and not “24 hours”?
For ease of perception. We automatically convert larger numbers to larger units (days, years) so you don't have to mentally divide them.
🔹 Do leap years count?
To simplify calculations, we use the standard astronomical year - 365 days. Leap days are not added because the calculator works with abstract intervals rather than specific calendar dates.
🔹 Is there a limit for entering numbers?
Almost not. You can add up thousands and millions of hours - the algorithm will handle it and give the correct result.