Calamansi is a citrus fruit that came from the Philippines.
Calamansi is a native fruit to the Philippines and surrounding areas in southern China, Taiwan, Borneo, and Sulawesi.
Lime is similar to Calamansi and sometimes Calamansi is mistaken for being the same as Lime but they are different fruits and have different tastes.
They are both limes but they are a different type of lime.
The Lime is slightly larger and has thin skin.
The fruit is normally used in making drinks.
Whereas Calamansi lime (Limau kasturi) is smaller and rounded and It taste less acidic and sweeter than key lime.