Calculus can be used in many areas of chemistry. While most first year college courses through organic chemistry don't use calculus, many of the principles required calculus to solve.
There are reaction rate equations, quantum chemistry, physical chemistry principles like thermodynamics, all momentum and wavelike properties of atoms need to use calculus to solve equations involved in these principles. Many chemistry courses do not directly require calculus but knowing the math helps with understanding the physical principles.
Most BA's in chemistry require a year of calculus. If you get an advanced degree in chemistry and are working in fields of quantum chemistry, you will need to know differential equations, partial differential equations, and multivariable calculus.