Citation Impact Calculator

Calculate the citation impact of a journal or paper by entering the number of citations in the current year and the number of publications from the previous two years. Your Impact Factor (IF) is returned instantly, along with a breakdown of the citation ratio — helping researchers, authors, and academics assess journal prestige and publication quality.

Total number of citations received by the journal in the current year (y).

Number of articles published by the journal in the previous year (y−1).

Number of articles published by the journal two years prior (y−2).

Select your field to see typical IF benchmarks for context.

Results

Impact Factor (IF)

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Total Publications (y−1 + y−2)

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Citations per Paper

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Impact Rating

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Typical IF for Selected Field

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Citations vs. Total Publications

Frequently Asked Questions

What is the Impact Factor (IF)?

The Impact Factor is a metric that measures the average number of citations received per paper published in a journal during the two preceding years. It is widely used to evaluate the relative importance and prestige of scientific journals within their fields.

How do I calculate the Impact Factor of a journal?

Divide the total number of citations received in the current year (y) by the sum of all articles published in the previous two years (y−1 and y−2). For example, if a journal received 98 citations and published 36 articles in y−1 and 38 in y−2, the IF = 98 ÷ (36 + 38) = 1.324.

What is a good Impact Factor?

A 'good' IF is highly relative to the research field. In most fields, an IF above 1.0 is considered decent, above 3.0 is good, and above 10.0 is excellent. Highly prestigious journals like Nature and Science have IFs exceeding 40. Always compare within the same discipline.

What is the Impact Factor for a journal publishing 75 articles and having 67 citations?

If a journal received 67 citations in the current year and published a combined total of 75 articles over the previous two years, the Impact Factor = 67 ÷ 75 ≈ 0.893. You can verify this using the calculator above by entering your specific values.

What are some journals with high impact factors in mechanical engineering?

Highly regarded mechanical engineering journals include Progress in Energy and Combustion Science (IF ~26), Applied Energy (IF ~11), and the International Journal of Heat and Mass Transfer (IF ~5–6). Impact factors in engineering are typically lower than in biomedical fields.

Does a high Impact Factor guarantee paper quality?

Not necessarily. Impact Factor reflects average citations at the journal level, not individual paper quality. A paper in a high-IF journal may receive few citations, while a paper in a lower-IF journal may become highly influential. Use IF as one of many quality indicators.

Why does the Impact Factor only use the last two years of publications?

The two-year window was chosen by Eugene Garfield, who developed the metric, to reflect the period during which most papers receive the bulk of their citations. Some fields use a five-year Impact Factor for slower-citation disciplines like humanities and social sciences.

What is the difference between Impact Factor and h-index?

The Impact Factor applies to journals and measures average citation rate per paper. The h-index applies to individual researchers and measures both productivity and citation impact — an h-index of 20 means 20 papers each cited at least 20 times. Both are useful but measure different dimensions of scholarly impact.

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