Max Planck was one of the most important German physicists of the late 19th and early 20th century, and is considered to be the founder of quantum theory.

Planck may also refer to:-

• Planck's law of black body radiation
• Planck's constant
• Planck units
  • Planck time
  • Planck length
  • Planck temperature
  • Planck current
  • Planck power
  • Planck density
• Planck epoch
• Planck particle
• Planck postulate
• Max-Planck-Gesellschaft
• Planck (crater)
• Planck Surveyor