Kalvøya (English: Calf Island) is situated in the inner Oslofjord. The island is right outside of Sandvika in Bærum. The island has been connected to the mainland by a suspension bridge to Kadettangen 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 also has its roots there.