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How many ounces are in a cup

Liquid Conversion Calculator: Cups, Ounces, Pints, Gallons & Liters

Use this liquid conversion calculator to instantly convert US cups, fluid ounces, pints, quarts, gallons, tablespoons, teaspoons, milliliters, and liters. Enter one amount, choose the unit, and get every common kitchen and hydration conversion at once.

Liquid Conversion Calculator

US customary volume units; fluid ounces measure volume, not weight.

How Many Ounces Are in a Cup?

One US cup equals 8 US fluid ounces. A fluid ounce is a volume measurement, so it is not the same as an ounce by weight. That distinction matters when you are measuring liquids for recipes, shakes, hydration, or supplements.

US Liquid Conversion Chart

US unit Equivalent
1 tablespoon 3 teaspoons
1 US fluid ounce 2 tablespoons
1 US cup 8 US fluid ounces
1 US pint 16 US fluid ounces or 2 cups
1 US quart 32 US fluid ounces or 4 cups
1 US gallon 128 US fluid ounces or 16 cups
1 liter 33.814 US fluid ounces

US vs. Imperial Fluid Ounces

This calculator uses US customary volume units. A US fluid ounce is approximately 29.57 milliliters, while an Imperial fluid ounce is approximately 28.41 milliliters. If a recipe or label uses Imperial units, do not assume the numbers match US measurements.

Use Conversions for Hydration and Recipes

Whether you are mixing a shake, tracking a bottle, or scaling a recipe, use volume conversions to make the math quick. For a daily hydration reference and bottle plan, use the Water Intake Calculator.

FAQ

How many fluid ounces are in a gallon?

One US gallon contains 128 US fluid ounces.

How many cups are in a liter?

One liter equals approximately 4.23 US cups.

Is a fluid ounce the same as an ounce by weight?

No. A fluid ounce measures volume; an ounce by weight measures mass.

Bottom Line

Use the calculator instead of doing conversion math manually. Enter any common liquid unit and get accurate US kitchen, hydration, and recipe conversions in one place.

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Comments

G - April 1, 2019

Math is awesome

me - March 7, 2019

You do realize this is wrong right? US Fluid ounce makes no sense.

bestchoicesinIndia - October 20, 2018

Great info to share , content was so informative

jeff gray - October 16, 2017

too much math, lol.

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