How Many Fl Oz in a Cup?

There are 8 fluid ounces (fl oz) in a US cup. This is the standard liquid measurement used in American recipes.

This tool runs entirely in your browser — nothing you enter is sent to a server or stored anywhere. It is free to use with no signup, works on phones, tablets, and desktops, and gives instant results as you type. Bookmark this page for quick access whenever you need it.

Use this page as a quick reference whenever you need the answer — the converter above handles any value, not just the common ones, and shows the exact formula so you can verify the math yourself. All calculations happen locally in your browser: fast, private, and free with no signup.

How many fl oz in a cup? — see the answer and conversion table below.

Use the related converter below for custom values.

Formula

Answer: There are 8 fluid ounces (fl oz) in a US cup. This is the standard liquid measurement used in American recipes.

Example

Question: How many fl oz in a cup? Answer: There are 8 fluid ounces (fl oz) in a US cup. This is the standard liquid measurement used in American recipes.

How to Use

  1. Read the direct answer at the top of the page
  2. Check the conversion table for common values
  3. Use the related converter for custom values
  4. Browse the FAQ for common follow-up questions

Frequently Asked Questions

Is fl oz the same as oz?

No. fl oz (fluid ounce) measures volume (29.57 ml). oz (ounce) measures weight (28.35 g). They are different for most substances.

How many fl oz in a pint?

There are 16 fl oz in a US pint and 20 fl oz in a UK imperial pint.

How many ml in a fl oz?

There are 29.57 ml in 1 US fluid ounce and 28.41 ml in 1 UK fluid ounce.