Calculate Credit Card Interest
This simplified estimate converts an annual percentage rate to a monthly rate. Actual issuers may calculate interest daily.
Formula: Monthly interest β Balance Γ APR Γ· 12
Financial formulas can depend on compounding, timing, or accounting definitions. The formula shown here identifies the specific relationship behind the calculator result.
Before relying on the figure, confirm that the rate, term, and amount represent the same transaction or reporting period.