In music, a dot placed after a note / rest increases its duration by half its original value. In other words, a dotted note is equal to the original note tied to a note of half its value.A dotted half note equals a half note tied to a quarter noteA dotted quarter note equals a quarter note tied to an eighth noteA dotted eighth note equals an eighth note tied to a sixteenth noteTo calculate the value of a dotted note / rest, take the original note or rest value, divide it by 2, and add the result to the original value.