fit factor

noun

A quantitative metric that measures how well a particular mask or respirator fits to a specific individual's face, defined as the ratio of the ambient concentration of aerosol particles to the concentration within the facepiece during use.

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Meanings

nounfit factor (plural fit factors)

plural fit factors

  1. A quantitative metric that measures how well a particular mask or respirator fits to a specific individual's face, defined as the ratio of the ambient concentration of aerosol particles to the concentration within the facepiece during use.
Cite this entry
APA

fit factor. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/fit%20factor

MLA

“fit factor.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fit%20factor. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “fit factor,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/fit%20factor.

Source: fit factor on Wiktionary, CC BY-SA 4.0.