Add Time is a simple and small program, totally free and does not even require installation, which will help you to count the hours that some action takes.
In Add Time you add time periods (10 minutes, 40 minutes, one full hour, 3 hours, etc.) and it will accumulate in that list, where it will show you in the end the total sum of all the time set. It also allows subtracting periods of time.
The final list obtained in Add Time can be exported to the Windows clipboard so that it can be pasted and used in another application. In some Windows it may not work, for this it is necessary to previously register the DLL: msvbvm50.dll.
You can free download Add Time 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.