How many hours a day are you actually productive?

It’s about 22:30 as I write this and I’ve worked with a few interruptions since 06:30. But you have to wonder how many minutes of actual useful work I got done.

There is a currently very brief discussion about this issue on Reddit. Part of the reason I want to tell you about this is to also point out that Reddit has useful productivity chatter. But here’s the start of this one in particular:

Taking away your bathroom breaks, lunches, Internet breaks, and staring into space, how many hours are you actually productive? This question is directed to office workers, primarily.

For me, it’s about three, MAYBE four hours. I feel like I get the same amount of work done if I come into the office for 3 or 4 hours (vs. 8 hours) because I stay focused for those 3 or 4 hours because I know I only HAVE those 3 or 4 hours…whereas during a normal 8 hour day, I’ll work for 30 minutes, get distracted for another 30, etc.

Do I just get mentally fatigued easily, or is this normal?

Reddit Productivity (24 July 2014)

Go add your tuppence, would you? But have a break first, obviously.