How do you pronounce "flatness"?

In American English: /ˈflætnəs/ (FLATN-uhs). In British English: /flˈatnəs/ (FL). In Canadian English: /ˈflætnəs/ (FLATN-uhs). In Australian English: /flˈatnəs/ (FL).

Is "flatness" pronounced differently in American and British English?

Yes. In American English it's pronounced /ˈflætnəs/ (FLATN-uhs), while in British English it's /flˈatnəs/ (FL).

How to Pronounce "flatness"

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flatness

regional

/ˈflætnəs/

FLATN-uhs

Syllable Breakdown

flætnflat·əsness

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14