Gottfried Wilhelm Leibniz (1646–1716) was a German philosopher and mathematician.

In engineering, the following concepts are attributed to Leibniz:

• Leibniz wheel, a cylinder used in a class of mechanical calculators
• Leibniz calculator, a digital mechanical calculator based on the Leibniz wheel

In mathematics, several results and concepts are named after Leibniz:

• Leibniz algebra, an algebraic structure
  • Dual Leibniz algebra
• Madhava–Leibniz series
  • Leibniz formula for π, an inefficient method for calculating π
• Leibniz formula for determinants, an expression for the determinant of a matrix
• Leibniz harmonic triangle
• Leibniz integral rule, a rule for differentiation under the integral sign
  • Leibniz–Reynolds transport theorem, a generalization of the Leibniz integral rule
• Leibniz's linear differential equation, a first-order, linear, inhomogeneous differential equation
• Leibniz's notation, a notation in calculus
• Leibniz operator, a concept in abstract logic
• Leibniz law, see product rule of calculus
• Leibniz rule, a formula used to find the derivatives of products of two or more functions
  • General Leibniz rule, a generalization of the product rule
• Leibniz's test, also known as Leibniz's rule or Leibniz's criterion
• Newton–Leibniz axiom

In philosophy, the following concepts are attributed to Leibniz:

• Leibniz's gap, a problem in the philosophy of mind
• Leibniz's law, an ontological principle about objects' properties

Additionally, the following are named after Leibniz:

• 5149 Leibniz, an asteroid
• Gottfried Wilhelm Leibniz Bibliothek in Hanover, Germany
• Gottfried Wilhelm Leibniz Prize, a German research prize
• Leibnitz, a lunar crater
• The Leibniz Association, a union of German research institutes
• The Leibniz Review, a peer-reviewed academic journal devoted to scholarly examination of Gottfried Leibniz's thought and work
• Leibniz University of Hannover, a German university
• Leibniz Institute of Agricultural Development in Transition Economies, a research institute located in Halle (Saale)
• Leibniz Institute for Astrophysics Potsdam, a German research institute in the area of astrophysics
• Leibniz institute for molecular pharmacology, a research institute in the Leibniz Association
• Leibniz Institute for Science and Mathematics Education at the University of Kiel, a scientific institute in the field of Education Research
• Leibniz Institute for Solid State and Materials Research, a research institute in the Leibniz Association
• Leibniz Society of North America, a philosophical society whose purpose is to promote the study of the philosophy of Gottfried Wilhelm Leibniz
• Leibniz-Keks, a German brand of biscuit^[1]
• Leibniz–Clarke correspondence, Leibniz' debate with the English philosopher Samuel Clarke
• Leibniz–Newton calculus controversy, the debate over whether Leibniz or Isaac Newton invented calculus