Calum Jarvis first represented Great Britain in 2012 and then went on to win silver at the Commonwealth Games before forming part of successful 4x200m Freestyle relay teams that won gold at back-to-back FINA World Championships in 2015 and 2017.
He was once again part of the title-winning Men's 4x200m Freestyle relay for GBR, this time at the Glasgow 2018 European Championships. His best individual result came in the 200m Freestyle posting a time fastest enough to progress through the semi-finals but due to the two per nation rule ended up ranked 15th.
Jarvis formed part of the British quartet in the World Championship heats that eventually went on to secure one of four gold medals at Budapest 2017. He sealed his place at the World Championships after winning bronze in the 200m Freestyle at the 2017 British Swimming Championships.
Jarvis made an impact at his first World championships by helping the British quartet to gold in the men’s 4x200m Freestyle relay, stealing the title from the USA in 2015. In that same year, Jarvis also claimed his second career British title in the 100m Freestyle at the London Aquatics Centre.
Jarvis qualified for his debut Commonwealth Game at the 2014 British Championships in Glasgow, impressing to set a Welsh record for fourth in the 100m Freestyle and winning his second British medal with silver over 200m Freestyle. He sprung a surprise to land 200m Freestyle bronze at Glasgow 2014, breaking David Davies' Welsh record in the final to seal his first senior international medal.
After a debut senior international appearance for Great Britain at the 2012 European Short Course Championships in Chartres, more finals spots secured at the 2013 edition of the British Championships, finishing sixth over 200m Freestyle and fifth over 200m Backstroke.
At the London 2012 Olympic Trials at the Aquatics Centre, Jarvis landed his first British title, setting a personal best for gold in the 200m Backstroke but narrowly missing the qualification time to swim at the Olympics.
|4x200m Freestyle Relay||2017||7:01.70||BR|
|4x200m Freestyle Relay||2019 - Gwangju||7:02.04||5th|
|4x200m Freestyle Relay||2017 - Budapest||7:01.70||Gold|
|100m Freestyle||2015 - Kazan||49.68||32nd|
|200m Freestyle||2015 - Kazan||1:47.64||14th|
|4x100m Freestyle||2015 - Kazan||3:15.70||10th|
|4x200m Freestyle||2015 - Kazan||7:04.33||Gold|
|100m Freestyle||2018 - Glasgow||50.37||47th|
|200m Freestyle||2018 - Glasgow||1:49.19||15th|
|4x100m Freestyle Relay||2018 - Glasgow||3:17.31||10th|
|4x200m Freestyle Relay||2018 - Glasgow||7:05.32||Gold|
|100m Freestyle||2018 - Gold Coast||49.77||13th|
|200m Freestyle||2018 - Gold Coast||1:46.53||5th|
|100m Butterfly||2018 - Gold Coast||53.36||7th|
|100m Freestyle||2014 - Glasgow||50.09||10th|
|200m Freestyle||2014 - Glasgow||1:46.53||Bronze|
|4x100m Freestyle Relay||2014 - Glasgow||3:19.82||6th|
|4x200m Freestyle Relay||2014 - Glasgow||7:15.96||6th|
|4x100m Medley Relay||2014 - Glasgow||3:37.25||6th|
|100m Freestyle||2019 - Glasgow||50.05||6th|
|200m Freestyle||2019 - Glasgow||1:47.18||4th|
|100m Butterfly||2019 - Glasgow||53.74||7th|
|100m Freestyle||2018 - Edinburgh||51.33||15th|
|200m Freestyle||2018 - Edinburgh||1:51.42||6th|
|50m Butterfly||2018 - Edinburgh||25.35||23rd|
|100m Freestyle||2017 - Sheffield||49.80||4th|
|200m Freestyle||2017 - Sheffield||1:47.02||Bronze|
|100m Butterfly||2017 - Sheffield||53.21||4th|
|100m Freestyle||2016 - Glasgow||49.85||5th|
|100m Freestyle||2015 - London||48.79||Gold|
|200m Freestyle||2015 - London||1:46.65||Bronze|
|100m Backstroke||2015 - London||55.55||9th|
|100m Freestyle||2014 - Glasgow||49.83||4th|
|200m Freestyle||2014 - Glasgow||1:47.77||Silver|
|200m Backstroke||2014 - Glasgow||2:01.58||9th|
|200m Freestyle||2013 - Sheffield||1:48.73||6th|
|100m Backstroke||2013 - Sheffield||55.81||11th|
|200m Backstroke||2013 - Sheffield||1:59.52||5th|
|100m Freestyle||2012 - London||50.09||10th|
|200m Freestyle||2012 - London||1:49.55||9th|
|100m Backstroke||2012 - London||57.22||29th|
|200m Backstroke||2012 - London||1:59.48||Gold|