This approach is not the proper one. More important is whether you are able to do the things you want to do and have enough energy to do them. The amount of time is only one point of view.
Adam Grant in his book Give and Take argues that you can boost your energy and maintain it by doing things that actually affect you as something that importance for you. There is no need to count hours; the true approach is to think about what makes us feel energized, both in and out of work. The time you devote to these activities is far more important.
When we think about work-life balance in terms of equal hours, we arrive at an unsurprising finding. As the Always On, Never Done? Don’t Blame the Smartphone paper says: professionals usually work significantly longer than 8.25 hours a day from Monday to Friday. If we want an equal amount of time for work and for our private life these two intervals would be 8.25 hours each. When we add the time sleeping, 7.5 hours every day, that makes the 24-hour day.
However, many workers also spend a certain amount of time devoted to work during weekends. In total when we take into account both workdays and weekend, there are, on average, approximately 72 hours a week connected to work. That means there are only 43.5 hours left, the number of hours they can spend with our families every week. Therefore there is no time balance.
-jk-