So if you are asking how many hours is part time hours , it is normally defined as working fewer hours than a full time employee. Part-time work is not standardized – in many companies, the working hours of part-time employees are between 20 and 35 hours per week. This varies depending on the employer, industry and the specific laws in place in the area. Knowing how many hours is part time hours can help job seekers to compare hours with benefits before accepting a job.