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oz to Cups Converter

This calculator uses the US liquid-volume relationships **8 US fluid ounces = 1 US cup** and **1 US fluid ounce = 29.5735295625 mL**. It converts volume, not ounces of mass.

Published

Cups

Converted cups
2 cups
US fluid ounces entered
16 fl oz
US cups
2 cups
Tablespoons
32 tbsp
Milliliters
473.18 mL

16 fl oz equals 2 US cups because 8 US fluid ounces make 1 cup.

Enter a liquid volume in US fluid ounces. Eight US fluid ounces equal one US cup.
fl oz

Results update as you type.

Worked example

fluidOunces: 16

Result: 2 cups

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US fluid ounces to cups converter

This calculator uses the US liquid-volume relationships 8 US fluid ounces = 1 US cup and 1 US fluid ounce = 29.5735295625 mL. It converts volume, not ounces of mass.

Formula

US cups=US fl oz8\text{US cups}=\frac{\text{US fl oz}}{8}

For 16 US fl oz, the result is 2 cups. Supporting tablespoon and milliliter values are calculated from the same unrounded input before rounding.

Related: the cups to oz converter for the reverse direction, plus the milliliters to cups calculator and ml to oz converter.

Frequently asked questions

How many US fluid ounces are in a US cup?
One US cup contains 8 US fluid ounces. Divide fluid ounces by 8 to obtain cups.

Sources

  • BIPM-SI-9-3.02

    primary · Jul 9, 2026

    Supports: SI base/derived units, prefixes, coherent dimensional relations, exact defining constants, day and degree accepted with SI; this route applies 16 / 8 (exact defined/conventional relationship).

    — v9th edition, version 3.02 (August 2025)

  • NIST-SP811-2008

    primary · Jul 9, 2026

    Supports: US customary/SI conversion factors and precision/significant-digit guidance; this route applies 16 / 8 (exact defined/conventional relationship).

    — vNIST SP 811, 2008 edition

  • NIST-HB44-2026

    primary · Jul 9, 2026

    Supports: US customary length, mass, liquid-volume, pressure and exact legal-metrology relationships; this route applies 16 / 8 (exact defined/conventional relationship).

    — vNIST Handbook 44, 2026 edition

Related calculators

ml to oz ConverterThis calculator converts milliliters to US fluid ounces. It uses **1 US fluid ounce = 29.5735295625 mL** and does not treat a mass ounce as a fluid ounce.Ounces to Milliliters CalculatorThis calculator converts US fluid ounces of volume to milliliters using **1 US fluid ounce = 29.5735295625 mL**. A mass ounce is a different unit and is outside this calculator's scope.Cups to Pints ConverterConvert US cups to pints for scaling recipes into pint jars, deli tubs, cartons, freezer containers, and small-batch food prep.Fluid Ounces to Pounds ConversionConvert US fluid ounces to pounds using a water approximation or a density you provide.Grams to fl oz ConverterConvert grams to US fluid ounces with explicit ingredient density presets for water, milk, oil, honey, flour, sugar, and custom materials.Cups to Quarts ConverterConvert US cups to quarts for scaling recipes into stockpots, mixing bowls, canning batches, pitchers, and quart-size containers.

oz to Cups Converter updated at

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