Mariah Carey has won 5 Grammy Awards. Her Grammy success began at the 33rd Annual Grammy Awards in 1991, when she won Best New Artist and Best Female Pop Vocal Performance for "Vision of Love."
Carey has been recognized across several Grammy categories during her career, including pop, R&B, and songwriting-related honors. Her five wins reflect both her vocal performances and her work as a songwriter and producer. The figure refers to competitive Grammy wins, not the number of nominations she has received.
A common source of confusion is that award totals can change when people combine Grammy Awards with other honors or count nominations as wins. Carey has received many more nominations than five, while major achievements such as her numerous Billboard chart records are separate from the Grammys. The stored answer is therefore the standard total used for her Grammy wins.