万有引力定律 (Newton's law of universal gravitation) 是艾萨克·牛顿在1687年于《自然哲学的数学原理》上发表的。牛顿的普适万有引力定律表示如下：

任意两个质点有通过连心线方向上的力相互吸引。该引力的大小与它们的质量乘积成正比，与它们距离的平方成反比，与两物体的化学本质或物理状态以及中介物质无关。

以数学表示为：

（更严谨的表达请见下文中的矢量式方程。）

其中：

依照国际单位制，F的单位为牛顿(N)，m₁和m₂的单位为千克(kg)，r 的单位为米(m)，常数G近似地等于6.67 × 10 N m kg（牛顿米的平方每千克的平方）。

Newton's law of universal gravitation states that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses but also inversely proportional to the square of the distance between them. This is a general physical law derived from empirical observations by what Isaac Newton called induction. It is a part of classical mechanics and was formulated in Newton's work Philosophiæ Naturalis Principia Mathematica ("the Principia"), first published on 5 July 1687. (When Newton's book was presented in 1686 to the Royal Society, Robert Hooke made a claim that Newton had obtained the inverse square law from him; see the History section below.)