What does it take to become a Doctor of Chiropractic? In most countries, chiropractors must complete a minimum of 6 years of college and post-graduate studies (the average is 7 years) to earn their degree. Their education includes at least 4,200 hours of classroom, laboratory, and clinical experience. Then, graduates must pass National and/or State Board examinations and become licensed by the state or province before they can practice. World Health Organization, 2005