Calculadora de Impacto de Periódico — Formula
## How Journal Impact Factor is Calculated
The impact factor (IF) measures how frequently articles from a journal are cited.
### Formula
**IF = Citations in Current Year to Articles Published in Prior Window / Total Articles in Window**
The standard window is 2 years. A journal that published 80 articles in 2 years and received 320 citations to those articles has an IF of 4.0.
### Context
- IF > 10: High impact
- IF 3-10: Good impact
- IF 1-3: Moderate impact
- IF < 1: Lower impact
The impact factor (IF) measures how frequently articles from a journal are cited.
### Formula
**IF = Citations in Current Year to Articles Published in Prior Window / Total Articles in Window**
The standard window is 2 years. A journal that published 80 articles in 2 years and received 320 citations to those articles has an IF of 4.0.
### Context
- IF > 10: High impact
- IF 3-10: Good impact
- IF 1-3: Moderate impact
- IF < 1: Lower impact
Exemplo Resolvido
A journal published 80 articles in the last 2 years and received 320 citations to those articles this year.
- Impact factor: 320 / 80 = 4.000
- Articles per year: 80 / 2 = 40.0