How much sleep does the average person need for every 24-hour period? Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question How much sleep does the average person need for every 24-hour period? Answers One to two hours Three to four hours Seven to eight hours Nine to ten hours Explanation To be alert enough to drive safely, the average person needs between seven and eight hours of sleep for every 24-hour period.