The KTH Royal Institute of Technology (Swedish: Kungliga Tekniska högskolan, lit. 'Royal Technical High School'), abbreviated KTH, is a public research university in Stockholm, Sweden. KTH conducts research and education in engineering and technology and is Sweden's largest technical university. Currently, KTH consists of five schools with four campuses in and around Stockholm.

KTH was established in 1827 as the Teknologiska institutet (Institute of Technology) and had its roots in the Mekaniska skolan (School of Mechanics) that was established in 1798 in Stockholm. But the origin of KTH dates back to the predecessor of the Mekaniska skolan, the Laboratorium mechanicum, which was established in 1697 by the Swedish scientist and innovator Christopher Polhem. The Laboratorium mechanicum combined education technology, a laboratory, and an exhibition space for innovations. In 1877, KTH received its current name, Kungliga Tekniska högskolan (KTH Royal Institute of Technology). The Swedish king, Carl XVI Gustaf, is the patron of KTH.

KTH is ranked 73rd in the world among all universities in the 2024 QS World University Rankings, which is higher than any other university in the Nordic countries.

KTH's earliest Swedish predecessor was the Laboratorium Mechanicum, a collection of mechanical models for teaching created in 1697 by Christopher Polhem. Polhem is considered to be the father of mechanics in Sweden. He founded the laboratorium as a school and research facility in the engineering field of mechanics after his extensive trips, studies and research abroad. The mechanical models that formed the basis of the education were used intermittently for teaching practical mechanics by different masters until the School of Mechanics (Mekaniska skolan) was founded in 1798. In 1827 the School of Mechanics was transformed into the Technological Institute (Teknologiska institutet), following the establishment of polytechnical schools in many European countries the early years of the 19th century, often based on the model of École polytechnique in Paris.

The institute had one professor in chemistry and one in physics, and one class in mechanical engineering and one in chemical engineering. During the first years, however, teaching was at a very elementary level, and more aimed at craftsmanship rather than engineering as such. The institute was also plagued by conflicts between the faculty and the founder and head of the institute, Gustaf Magnus Schwartz, who was responsible for the artisanal focus of the institute. A government committee was appointed in 1844 to solve the issues, which led to removing Schwartz in 1845. Instead, Joachim Åkerman, the head of the School of Mining in Falun and a former professor of chemistry at KTH, took over. He led a full reorganisation of the institute in 1846–1848, after which he returned to his post in Falun. An entrance test and a minimum age of 16 for students was introduced, which led to creating proper engineering training at the institute. In 1851, the engineering program was extended from two years to three.

In the late 1850s, the institute entered a time of expansion. In 1863, it received its own purpose-built buildings on Drottninggatan. In 1867, its regulations were again overhauled, to state explicitly that the institute should provide scientific training to its students. In 1869, the School of Mining in Falun was moved to Stockholm and merged with the institute. In 1871, the institute took over the civil engineering course formerly arranged by the Higher Artillery College in Marieberg.

In 1877, the name was changed into the current one, which changed KTH's status from Institute (institut) to College (högskola), and some courses were extended from three years to four. Architecture was also added to the curriculum.

In 1915, the degree titles conferred by KTH received legal protection. In the late 19th century, it had become common to use the title civilingenjör (literally "civil engineer") for most KTH-trained engineers, and not just those who studied building and construction-related subjects. The only exception was the mining engineers, which called themselves bergsingenjör ("mountain engineer"). For a while, the title civilingenjör was equal to "KTH graduate" but in 1937, Chalmers in Gothenburg became the second Swedish engineering college which were allowed to confirm these titles.

In 1917, the first buildings of KTH's new campus on Valhallavägen were completed, and still constitute its main campus.

Although the engineering education of the late 19th and early 20th century were scientifically founded, until the early 20th century, research as such was not seen as a central activity of an Institute of Technology. Those engineering graduates who went on to academic research had to earn their doctorates, typically in physics or chemistry, at a regular university. In 1927, KTH was finally granted the right to confer its own doctorates, under the designation Teknologie doktor (Doctor of Technology), and the first five doctors were created in 1929.

In 1984, the civilingenjör programs at all Swedish universities were extended from four years to 4.5. From 1989, the shorter programs in technology arranged by the municipal polytechnical schools in Sweden was gradually extended and moved into the university system, from 1989 as two-year programs and from 1995 alternatively as three-year programs. For KTH, this meant that additional campuses around the Stockholm area were added.

In the present-day, KTH provides one-third of Sweden's research and engineering education. In 2019, there were a total of 13,500 undergraduate students, 1,700 doctoral students, and 3,600 staff members at the university.

After the American deployment of nuclear weapons at the end of World War II, the Swedish military leadership recognized the need for nuclear weapons to be thoroughly investigated and researched to provide Sweden with the knowledge to defend itself from a nuclear attack. With the mission to "make something with neutrons", the Swedish team, with scientists like Rolf Maximilian Sievert, set out to research the subject and eventually build a nuclear reactor for testing.

After a few years of basic research, they started building a 300 kW (later expanded to 1 MW) reactor, named Reaktor 1 (R1), in a reactor hall 25 meters under the surface right underneath KTH. Today this might seem ill-considered, since approximately 40,000 people lived within a 1 km radius. It was risky, but was deemed tolerable since the reactor was an important research tool for scientists at the Royal Swedish Academy of Engineering Sciences (Ingenjörsvetenskapsakademien).

At 18:59 on 13 July 1954, the reactor achieved criticality and sustained Sweden's first nuclear reaction. R1 was to be the main site for almost all Swedish nuclear research until 1970 when the reactor was finally decommissioned, mostly due to the increased awareness of the risks associated with operating a reactor in a densely populated area of Stockholm.

The motto of KTH, "Vetenskap och konst," is directly translated as "Science and Art." Here, the word konst (art) does not necessarily refer to creative art as the word typically does in its English usage. Rather, konst paired with vetenskap (science) more precisely describes the konst of putting scientific knowledge into practice; that is, through ingenjörskonst (engineering, literally "art of engineering"). Hence, another possible translation of the motto is "Science and the Art of its Application."

KTH is organized into five schools individually responsible for education and research activities. Each of the schools head a number of departments, centres of excellence, and study programmes. The schools are:

• School of Architecture and the Built Environment
• School of Electrical Engineering and Computer Science
• School of Engineering Sciences
• School of Engineering Sciences in Chemistry, Biotechnology and Health
• School of Industrial Engineering and Management

University rankings
Global – Overall
ARWU World	201–300 (2023)
QS World	=73 (2024)
THE World	=97 (2024)
USNWR Global	240 (2023)

KTH was 73rd worldwide in the QS WUR 2024, 97th worldwide in the THE WUR 2024, 201–300th worldwide in ARWU 2022, and 207th worldwide in the USNEWS rankings.

KTH was the 138th best-ranked universities worldwide in 2022 in terms of aggregate performance across QS, THE, and ARWU, as reported by ARTU.

It was ranked 101–125th worldwide in the THE World Reputation Rankings 2022.

In the QS rankings by subject 2023:

Subjects (only subjects ranked within the top 100 are listed)	KTH's world rank
Engineering-Mechanical	23
Material Sciences	23
Engineering-Electrical and Electronic	23
Architecture and Built Environment	26
Engineering-Civil and Structural	44
Mathematics	48
Engineering-Chemical	58
Statistics and Operational Research	51-100
Computer Science and Information Systems	62
Physics and Astronomy	64
Environmental Sciences	78
Chemistry	87

In the Times Higher Education subject rankings 2023:

Subjects	KTH's world rank
Engineering & Technology	53
Physical Sciences	126-150
Computer Science	77

KTH Campus is the main campus of KTH located in the area of Östermalm. The main buildings by architect Erik Lallerstedt, were completed in 1917. The bells of the clock-tower were completed ten years later in 1927 at the 10 year anniversary of the transformation of the School of Mechanics to the Technological Institute. The buildings and surroundings were decorated by prominent early 20th-century Swedish artists such as Carl Milles, Axel Törneman, Georg Pauli, Tore Strindberg and Ivar Johnsson. The older buildings on the campus were renovated heavily in 1994. While the original campus was large at the time of construction, KTH very soon outgrew it, and the campus has since been expanded with new buildings. KTH Campus is still the base for most of the university's operations.

In the 1980s, the predecessor to the current School of Electrical Engineering and Computer Science (at KTH) located some of their operations to a campus in Kista, Stockholm. Kista is situated north of central Stockholm and is Sweden's largest corporate center and one of the most important ICT clusters in the world. The area is home to over a thousand companies in the ICT sector, for example Ericsson, Volvo, IBM, Tele2, TietoEnator, Microsoft, Intel and Oracle.

Since 2002, the current School of Engineering Sciences in Chemistry, Biotechnology and Health (at KTH) has had a part of its activities in Flemingsberg, Stockholm. Flemingsberg is an area of high academic density and one of northern Europe's most important areas for biotechnology, both in terms of research and industrial activities. Södertörn University and the Karolinska Institute also conducts education and research in Flemingsberg, often in collaboration with KTH.

KTH Södertälje is the southernmost and smallest KTH campus, located in the city of Södertälje. Education at KTH Södertälje is constantly developed via a close co-operation with the town's business community and in particular major Södertälje companies such as Scania and AstraZeneca. KTH offers both bachelor's and master's level courses on the campus, mainly focused on mechanical engineering, logistics, production and product development.

The library at the Royal Institute of Technology ("Kungliga Tekniska högskolans bibliotek", KTHB) is Sweden's largest library for technology and basic sciences. The foundation for the library was laid in 1827, when KTH was founded in Stockholm. The main library is located on KTH's main campus in central Stockholm. The KTH library is a central academic meeting place at KTH, and an arena for collaboration. The library also has two branch libraries, in Kista and Södertälje.

KTH Library supports the academic and digital skills of students and researchers. The library promotes open access publishing and provides the university with analyses that support and make it easier to make strategic decisions. One of the goals is to increase the awareness of KTH's research. The library's main purpose is to strengthen the quality of education and research.

The foundation for the library was created in 1827 when the Institute of Technology was founded in Stockholm. The institute's first director, Gustav Magnus Schwartz, made a study trip to France, Germany and England, where he bought books for the institute's library. The first collection of 800 books consisted mainly of books on crafts. In 1845, Professor Joachim Åkerman became the institute's new director. During his time, the library focused entirely on scientific literature. In 1869, Falu Bergsskola was transferred to the institute, and 2 000 books in metallurgy and chemistry were incorporated into the library collection.

In 2013, KTH library was visited by US president Barack Obama.

The library currently focuses on electronic books and journals, and it is also responsible for the KTH part of DiVA, the institutional repository for research publications, where all KTH publications are collected. The library has extensive printed collections that have been built up over time. The rare books collection consists of 60,000 volumes from 1827 to 1960 and is located in the main library.

The main library is housed in a building from 1917 designed by architect Erik Lallerstedt, who also designed the rest of the university's then new campus. The building was later rebuilt several times, and in the 1950s the former open courtyard was built in. During the period 2000–2002, the building was rebuilt according to drawings by architect Per Ahrbom. The extension from the 1950s was demolished and a new entrance and office building with a glass facade were erected. The courtyard is the library's central room, and the rest of the library is grouped around the courtyard. Old facades have been renovated, both towards the courtyard and towards the streets. Inside, the old part of the house has been renovated and regained much of the original architecture.

The renovation and extension of the library has won several architectural awards. In 2004, Per Ahrbom was awarded the “Helgopriset”.

The title was överdirektor first, then föreståndare and from the beginning of the 20th century rektor.

1825–1845: Gustaf Magnus Schwartz [sv]

1845–1848: Joachim Åkerman [sv], (acting)

1848–1855: Lars Johan Wallmark [sv]

1856–1877(1890): Knut Styffe [sv]

(1856)1877–1890: Knut Styffe [sv]

1890–1902: Gustaf Robert Dahlander [sv] (acting)

1902–1909: Anders Lindstedt

1909–1922: Carl Jacob Magnell [sv]

1922–1927: Henning Pleijel [sv]

1927–1931: Tore Lindmark [sv]

1931–1943: Henrik Kreüger

1942: Håkan Sterky [sv], (acting)

1943–1964: Ragnar Woxén [sv]

1964–1968: Lennart Stockman [sv]

1968–1974: Göran Borg [sv]

1974–1980: Anders Rasmuson [sv]

1980–1988: Gunnar Brodin [sv]

1988–1998: Janne Carlsson [sv]

1998–2007: Anders Flodström

2007: Anders Eriksson [sv]

2007-2016: Peter Gudmundson [sv]

2016-2022: Sigbritt Karlsson

2022 -: Anders Söderholm

Many prominent former students have attended KTH, including;

• Salomon August Andrée, Arctic explorer
• Ernst Alexanderson, inventor
• Joe Armstrong, creator of the programming language Erlang
• Karl Johan Åström, control engineer, IEEE Medal of Honor recipient (1993)
• Kurt Atterberg, composer (graduated 1911)
• Peter Arvai, CEO and co-founder of Prezi, graduated 2006
• Karl-Birger Blomdahl, composer
• Halldóra Briem, architect
• Samir Brikho, chief executive of AMEC
• Georg Theodor von Chiewitz, architect
• Magnus Egerstedt, professor at Georgia Institute of Technology
• Daniel Ek, entrepreneur and technologist who started Spotify (did not graduate)
• Börje Ekholm, previously CEO of Investor AB and after that CEO of Ericsson AB
• Carl Daniel Ekman, pioneer in producing wood pulp for paper
• Erik Engstrom, chief executive of Reed Elsevier
• Knut Frænkel, Arctic explorer
• Christer Fuglesang, ESA astronaut, first Swedish citizen in space, physicist
• Ali Ghodsi, co-founder and CEO of Databricks
• Ivar Jacobson, inventor of sequence diagrams, and Unified Modeling Language (UML)
• Ivar Kreuger, industrialist
• Gustaf Larson, co-founder of Volvo
• Peter Lindgren, former guitarist of Opeth
• Fredrik Ljungström, inventor, KTH Great Prize recipient
• Emma Lundberg, cell biologist, professor at KTH Royal Institute of Technology
• Dolph Lundgren, actor
• Carl Munters, inventor
• Immanuel Nobel, inventor and industrialist
• Claudia Olsson, founder and CEO of Stellar Capacity
• Helge Palmcrantz, inventor
• Baltzar von Platen, inventor
• Maja Reichard, Paralympian
• Tinga Seisay, diplomat
• Max Tegmark, full professor of cosmology at Massachusetts Institute of Technology
• Inger Thorén (nee Bildt), Swedish engineer and food chemist, in 1938, the first woman assistant appointed at KTH.
• Almida de Val, Olympian
• Gunnar Widforss, Swedish-American artist
• Greta Woxén (née Westberg) Sweden's first female civil engineer when she graduated in 1928.
• Niklas Zennström, co-founder of Skype

• Hannes Alfvén, Nobel Prize laureate and plasma physicist (1908–1995)
• Kai Siegbahn, Nobel Prize laureate and physicist (1918–2007)
• Lennart Carleson, Abel Prize laureate
• Stanislav Smirnov, Fields Medal winner
• Sven Ove Hansson
• Johan Håstad, two-time Gödel Prize winner
• Carl-Gunne Fälthammar, plasma physicist
• Arne Kaijser
• Ari Laptev, professor of mathematics at KTH and chair in pure mathematics at Imperial College London, president of the European Mathematical Society
• Peter Pohl, author and university lecturer in numerical analysis, joint recipient of the 1992 August Prize (Augustpriset)
• Subra Suresh, former guest professor, director of the National Science Foundation, professor of engineering at Massachusetts Institute of Technology
• Waloddi Weibull
• Hilding Faxén, former professor of mechanics and known for Faxén's law in fluid dynamics

KTH Great Prize is a prize annually awarded by KTH. The distributed amount was SEK 1,200,000 in 2019.

The prize is awarded to:

• A person who invented significant innovative applications of scientific knowledge in practical areas,
• A person who, through scientific research, found particularly valuable principles or methods useful for applications
• A person who, through artistic efforts, has exercised a powerful influence on the soul and life of people.

The recipient of the award must also be a Swedish citizen. Usually, the prize is awarded to a single prize winner, but it has happened that two or three prize winners have shared the prize. The list of recipients is at KTH:s stora pris.

KTH has been awarded the title "European University" by the European Commission. Together with six other European technical universities, KTH has formed the alliance UNITE! (University Network for Innovation, Technology and Engineering). The aim of the network is to create a trans-European campus, to introduce trans-European curricula, to promote scientific cooperation between the members and to strengthen knowledge transfer between the countries. The alliance includes the Technische Universität Darmstadt, Aalto University, KTH, the Polytechnic University of Turin, the Polytechnic University of Catalonia and the University of Lisbon.

• Blandaren
• List of universities in Sweden
• List of forestry universities and colleges
• ESDP-Network
• Top Industrial Managers for Europe

• Official website
• KTH Royal Institute of Technology - Obama saw future fuel cell from EE Archived 4 December 2013 at the Wayback Machine

59°20′50″N 18°04′22″E / 59.34722°N 18.07278°E / 59.34722; 18.07278