New games! PlayTrivia andBirthle.


James Prescott Joule

1818 - 1889

Photo of James Prescott Joule

Icon of person James Prescott Joule

James Prescott Joule (; 24 December 1818 – 11 October 1889) was an English physicist, mathematician and brewer, born in Salford, Lancashire. Joule studied the nature of heat, and discovered its relationship to mechanical work. This led to the law of conservation of energy, which in turn led to the development of the first law of thermodynamics. Read more on Wikipedia

Since 2007, the English Wikipedia page of James Prescott Joule has received more than 1,003,882 page views. His biography is available in 113 different languages on Wikipedia (up from 112 in 2019). James Prescott Joule is the 12th most popular physicist (down from 10th in 2019), the 37th most popular biography from United Kingdom and the 5th most popular British Physicist.

James Prescott Joule was most famous for his work in thermodynamics. He was the first to calculate the mechanical equivalent of heat, which is the amount of work that can be done by a certain amount of heat.

Memorability Metrics

  • 1.0M

    Page Views (PV)

  • 80.86

    Historical Popularity Index (HPI)

  • 113

    Languages Editions (L)

  • 19.42

    Effective Languages (L*)

  • 3.30

    Coefficient of Variation (CV)

Page views of James Prescott Joules by language


Among physicists, James Prescott Joule ranks 12 out of 717Before him are Wilhelm Röntgen, Alessandro Volta, Max Planck, Robert Hooke, Pierre Curie, and Hans Christian Ørsted. After him are André-Marie Ampère, Ernest Rutherford, Niels Bohr, James Clerk Maxwell, Evangelista Torricelli, and Georg Ohm.

Most Popular Physicists in Wikipedia

Go to all Rankings


Among people born in 1818, James Prescott Joule ranks 2Before him is Karl Marx. After him are Alexander II of Russia, Emily Brontë, Ignaz Semmelweis, Ivan Turgenev, Christian IX of Denmark, Charles Gounod, Jacob Burckhardt, Lewis H. Morgan, Marius Petipa, and Rudolf von Jhering. Among people deceased in 1889, James Prescott Joule ranks 1After him are Rudolf, Crown Prince of Austria, Antonio Meucci, Baroness Mary Vetsera, Jefferson Davis, Alexandre Cabanel, Father Damien, Luís I of Portugal, Mihai Eminescu, Michel Eugène Chevreul, Nikolay Chernyshevsky, and Charles III, Prince of Monaco.

Others Born in 1818

Go to all Rankings

Others Deceased in 1889

Go to all Rankings

In United Kingdom

Among people born in United Kingdom, James Prescott Joule ranks 37 out of 7,765Before him are Robert Hooke (1635), Lord Byron (1788), Jane Austen (1775), John Dalton (1766), David Hume (1711), and Mary II of England (1662). After him are Thomas More (1478), Arthur Conan Doyle (1859), Anthony Hopkins (1937), John Lennon (1940), Edward Jenner (1749), and James Clerk Maxwell (1831).

Among PHYSICISTS In United Kingdom

Among physicists born in United Kingdom, James Prescott Joule ranks 5Before him are Isaac Newton (1643), Stephen Hawking (1942), Michael Faraday (1791), and Robert Hooke (1635). After him are James Clerk Maxwell (1831), William Gilbert (1544), Paul Dirac (1902), J. J. Thomson (1856), Thomas Young (1773), James Chadwick (1891), and Charles Thomson Rees Wilson (1869).