There are 5 stages to Kohlberg's theory.
Stage 1: Obedience-and-Punishment Orientation
Stage 1 focuses on one's desire between their moral decisions. Children often fall under this because they don't know what they are doing right and needs correction from adults.
Stage 2: Instrumental Orientation
Stage 2 is in which right behavior is defined by whatever the individual believes to be in their best interest. Stage two reasoning shows a limited interest in the needs of others, only to the point where it might further the individual's own interests.
Level 2: Conventional
Throughout the conventional level, a child's sense of morality is tied to personal and societal relationships. Children continue to accept the rules of authority figures, but this is now due to their belief that this is necessary to ensure positive relationships and societal order. Adherence to rules and conventions is somewhat rigid during these stages, and a rule's appropriateness or fairness is seldom questioned.
Stage 3: Good Boy, Nice Girl Orientation
In stage 3, children want the approval of others and act in ways to avoid disapproval. Emphasis is placed on good behavior and people being "nice" to others.
Stage 4: Law-and-Order Orientation
In stage 4, the child blindly accepts rules and convention because of their importance in maintaining a functioning society. Rules are seen as being the same for everyone, and obeying rules by doing what one is "supposed" to do is seen as valuable and important. Moral reasoning in stage four is beyond the need for individual approval exhibited in stage three. If one person violates a law, perhaps everyone would—thus there is an obligation and a duty to uphold laws and rules. Most active members of society remain at stage four, where morality is still predominantly dictated by an outside force.
Level 3: Postconventional
Throughout the postconventional level, a person's sense of morality is defined in terms of more abstract principles and values. People now believe that some laws are unjust and should be changed or eliminated. This level is marked by a growing realization that individuals are separate entities from society and that individuals may disobey rules inconsistent with their own principles. Post-conventional moralists live by their own ethical principles—principles that typically include such basic human rights as life, liberty, and justice—and view rules as useful but changeable mechanisms, rather than absolute dictates that must be obeyed without question. Because post-conventional individuals elevate their own moral evaluation of a situation over social conventions, their behavior, especially at stage six, can sometimes be confused with that of those at the pre-conventional level. Some theorists have speculated that many people may never reach this level of abstract moral reasoning.
Stage 5: Social-Contract Orientation
In stage 5, the world is viewed as holding different opinions, rights, and values. Such perspectives should be mutually respected as unique to each person or community. Laws are regarded as social contracts rather than rigid edicts. Those that do not promote the general welfare should be changed when necessary to meet the greatest good for the greatest number of people. This is achieved through majority decision and inevitable compromise. Democratic government is theoretically based on stage five reasoning.
Stage 6: Universal-Ethical-Principal Orientation
In stage 6, moral reasoning is based on abstract reasoning using universal ethical principles. Generally, the chosen principles are abstract rather than concrete and focus on ideas such as equality, dignity, or respect. Laws are valid only insofar as they are grounded in justice, and a commitment to justice carries with it an obligation to disobey unjust laws. People choose the ethical principles they want to follow, and if they violate those principles, they feel guilty. In this way, the individual acts because it is morally right to do so (and not because he or she wants to avoid punishment), it is in their best interest, it is expected, it is legal, or it is previously agreed upon. Although Kohlberg insisted that stage six exists, he found it difficult to identify individuals who consistently operated at that level.
Source: Boundless. “Kohlberg's Stages of Moral Development.” Boundless Psychology Boundless, 20 Sep. 2016. Retrieved 09 Dec. 2016 from https://www.boundless.com/psychology/textbooks/boundless-psychology-textbook/human-development-14/theories-of-human-development-70/kohlberg-s-stages-of-moral-development-268-12803/