How do you pronounce "neptune"?

In American English: /ˈnɛptuːn/ (NEHPT-oon). In British English: /nˈɛptjuːn/ (N-ehpty). In Canadian English: /ˈnɛptuːn/ (NEHPT-oon). In Australian English: /nˈɛptjuːn/ (N-ehpty).

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

Yes. In American English it's pronounced /ˈnɛptuːn/ (NEHPT-oon), while in British English it's /nˈɛptjuːn/ (N-ehpty).

How to Pronounce "neptune"

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neptune

regional

/ˈnɛptuːn/

NEHPT-oon

Syllable Breakdown

nɛptnep·uːntune

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14