Engineers work about 40 hours/week, worldwide. The working hours of engineers can vary depending on their specific field and job requirements.

In general, engineers work around 40 to 50 hours per week. However, some fields may require more hours, such as those involved in construction or project management, which may require working on weekends and overtime.

Software engineers usually work a standard 40-hour workweek, but they may work longer hours during critical project phases or software releases.

Electrical engineers work a standard 40-hour workweek but may be required to work longer hours to meet project deadlines.

Mechanical engineers may work a standard 40-hour workweek or may be required to work longer hours, especially during the design phase of a project.

Chemical engineers put in a standard 40-hour workweek, but those in the manufacturing industry may be required to work longer hours to ensure the efficient operation of production processes.

Structural engineers work standard 40-hour workweek, but may also be required to work longer hours during project deadlines.

Civil engineers may also work a standard 40-hour workweek but may need to work longer hours during the construction phase of a project.

The number of hours engineers work varies depending on their field and specific job requirements.

While some engineers work a standard 40-hour workweek, others may be required to work longer hours to meet project deadlines or to ensure the efficient operation of production processes.

While Bruce answered the question perfectly, I want to share my personal experience.

As a software engineer, I've put in over 50 hours/week for several years. It was exhausting.

Then I started my own business, and I worked like a dog for almost 12-14 hours a day; sometimes, 4-5 hours at stretch. It wasn't good for health; but I did it anyways.

So yeah; it depends upon what you are working on.