Kalvøya is situated in the inner Oslofjord

Oslofjord

The Oslofjord is a bay in the south-east of Norway, stretching from an imaginary line between the Torbjørnskjær and Færder lighthouses and down to Langesund in the south to Oslo in the north....

. The island is right outside of Sandvika

Sandvika

is the administrative centre of the municipality of Bærum in Norway. It was declared a city by the municipal council in Bærum on 4 June 2003.Sandvika is situated approximately west of Oslo. It is the main transportation hub for Western Bærum, and has a combined bus and railway station. Sandvika is...

 in Bærum

Bærum

is a municipality in Akershus county, Norway. The administrative centre of the municipality is the town of Sandvika. Bærum was established as a municipality on 1 January 1838. A suburb of Oslo, Bærum is located on the west coast of the city....

. The island has been connected to the mainland by a suspension bridge to Kadettangen

Kadettangen

Kadettangen is a small peninsula outside of Sandvika in Bærum, Norway. Originally named Sandvikstangen, it got its current name from the cadet training conducted by the Norwegian Military Academy for the better part of the nineteenth century...

 since 1963.

Kalvøya is one of the most popular bathing spots in Bærum. On the far east side of the island there is a nude beach.

Kalvøya plays host to an annual soccer tournament for kids and a children's festival. The festival Øyafestivalen

Øyafestivalen

Øyafestivalen is an annual Norwegian music festival held in Middelalderparken , Oslo. It has grown quickly since its modest start in 1999 with an audience of 1000 people in one day, and has now become one of Norway's biggest festivals....

 also has its roots there.

Kalvøya is also host to an annual music festival where several national acts have performed live over the years including Billy Idol

Billy Idol

William Michael Albert Broad , better known by his stage name Billy Idol, is an English rock musician. A member of the Bromley Contingent of Sex Pistols fans, Idol first achieved fame in the punk rock era as a member of the band Generation X...

, Iggy Pop

Iggy Pop

Iggy Pop is an American singer, songwriter, musician, and actor. Though considered an innovator of punk rock, Pop's music has encompassed a number of styles over the years, including pop, metal, jazz and blues...

, Morten Abel

Morten Abel

Morten Abel Knutsen, , better known by his stage name Morten Abel is a Norwegian pop artist, and one of Norway's best-selling domestic artists.-Career:...

, and The September When

The September When

The September When is a Norwegian rock band formed in Stavanger in 1987, by vocalist Morten Abel, guitarist Tor Øyvind Syvertsen and keyboardist Helge Hummervoll, all former members of the band Mods. They signed a recording contract with Warner Music in Norway, and released their self-titled debut...

.