KTH Royal Institute of Technology (), 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. Since 2018, 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 was ranked 74th in the world among all universities in the 2025 QS World University Rankings, which was higher than any other university in the Nordic countries.

History 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 establishment of the Technological Institute had been ordered by King Charles XIV John on 18 May 1825; its first lecture, in mathematics, was held on 6 June 1827.

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 were 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 2026, KTH provides one-third of Sweden's research and engineering education.

In 2024, there were a total of 15,200 undergraduate students, 1,551 doctoral students, and 4,117 staff members at the university.

R1 nuclear reactor

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.

Motto 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."

Schools

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 (ABE) School of Electrical Engineering and Computer Science (EECS) School of Engineering Sciences (SCI) School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH) School of Industrial Engineering and Management (ITM) The abbreviations are used officially by the university.

International and national ranking

Overall rankings KTH was 78th worldwide in the QS WUR 2026, 98th worldwide in the THE WUR 2026 and 201–300th worldwide in ARWU 2025.

In its key subject area, Engineering and Technology, KTH ranked 33 world-wide in the QS World University Rankings by Subject 2026, making KTH the 5th highest ranked university in Engineering and Technology within the European Union. KTH ranked 40 world-wide within Engineering in the THE World University Rankings by Subject 2026, making KTH the 4th highest ranked university in Engineering in the European Union.

KTH was the 118th best-ranked university worldwide in 2025 in terms of aggregate performance across QS, THE, and ARWU, as reported by ARTU.

Subject Rankings In the QS World University Rankings by Subject 2026: Subjects (only subjects ranked within the top 100 are listed)KTH's world rankKTH's EU rankMechanical, Aeronautical and Manufacturing Engineering204Electrical and Electronic Engineering203Materials Science242Architecture and Built Environment4410Chemical Engineering518Civil and Structural Engineering51-1009Engineering-Chemical588Statistics and Operational Research51–1008Data Science and Artificial Intelligence51–1007Computer Science and Information Systems616Mathematics629Environmental Sciences6813Chemistry7210Physics and Astronomy7214Natural Sciences8516 In the Times Higher Education Subject Rankings 2026: SubjectsKTH's world rankKTH's EU rankEngineering & Technology404Computer Science669Physical Sciences101–12522

Campuses

KTH Campus 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.

KTH Kista 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 2025 however, the KTH Kista campus has been closed, and all of its students and faculty moved to the main KTH campus.

KTH Flemingsberg 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