Add durations in hours, minutes and seconds

Add durations in hours, minutes and seconds. Handy for teams and individuals planning schedules, checking deadlines or preparing a document.

Add durations in hours, minutes and seconds. The answer appears right away in your browser and is ready to use, with no account, upload or stored data.

How to use

Type one duration per line, using either the short form with hours and minutes or the clock form with colons.
Add as many lines as your record needs: trips, tasks or separate segments of the same project.
Run the addition to get a single total expressed in the largest useful unit.
Copy the total into your schedule or expense sheet, then clear the list if it contains internal details.

Example

The sample mixes several durations, some written in the short form and some in clock form. After adding them, check that the total is at least as large as the rough figure you had in mind and that the minutes were correctly carried over into hours.

Input

2h15
00:45:10
1h

Limits and formats

Each line should hold a single duration; a line mixing words and numbers may be skipped during the calculation.
Both writing conventions work, but mixing them inside one line quickly becomes confusing to re-read.
The tool only adds: hourly rates, breaks and rounding rules are for you to apply afterwards.
Double-check the total before reuse when the durations come from different sources.

Where processing happens

The addition runs in the browser: the durations you paste stay on your device and are not sent to any service. The tool converts every line into seconds, sums them and renders the total back in familiar units.

Frequently asked questions

Which duration formats can I write?

The two common shapes work: hours and minutes in the short form, and the clock form with colons between hours, minutes and seconds. Keep one style across your lines so the total stays easy to re-read later.

What should I do if a line is ignored?

Look for a typo: a stray space in the middle, a missing letter or an unexpected unit is enough to drop a line. Rewrite it cleanly and run the addition again to confirm that the total has changed.

Can the total go past 24 hours?

Yes, nothing caps the sum at a single day. A total of several dozen hours is displayed as it is, which helps when you add up a week of recorded work or a series of long journeys.