* Four years: Bachelor's degree (any subject, but pre-law is common). While the undergraduate major doesn't matter, strong grades are crucial for law school admission.
* Three years: Juris Doctor (J.D.) degree from an accredited law school.
After graduating law school, you then must pass the bar exam in the state(s) where you wish to practice law. Some states also require additional coursework or a period of supervised practice (e.g., clerkship) before allowing you to practice independently.