The impact factor is calculated based on a two-year period. It is derived by dividing the number of citations in the current year to articles published in the previous two years by the total number of articles published in those two years. For example, the impact factor for the year 2023 would be calculated as follows:
Number of citations in 2023 to articles published in 2021 and 2022 Divided by the total number of articles published in 2021 and 2022
