Free kitchen calculator

Oz to Cups Converter

Convert oz to cups for US and UK fluid ounces. Includes cup sizes, quick chart, formula and kitchen measuring tips. The oz to cups result updates as you type, works offline, and is built for real recipe work on a phone or laptop.

What this oz to cups tool is for

Use this for fluid ounces to cups, especially beverage, stock, milk and oil measurements. The calculator treats oz as fluid ounces, not weight ounces.

Primary keywordoz to cups
Runs offlineYes, all math happens in the browser
Formulacups = fluid ounces x fl oz ml / selected cup ml
US fluid ounce29.5735 ml
US cup rule8 fl oz = 1 cup

Useful ways to use this calculator

Best use cases
  • Convert US fluid-ounce beverage and liquid measurements.
  • Convert stock, milk, juice, oil and cream into cups.
  • Understand that fluid ounces are volume, not weight.
  • Scale recipes from bottle or can labels.
Common mistakes to avoid
  • Do not use this for ounces by weight.
  • Do not assume UK and US fluid ounces are identical.
  • Do not convert sticky liquids without scraping the measuring cup.
How to read the result

This calculator treats oz as fluid ounces. For butter, flour or chocolate ounces by weight, use a weight converter instead.

Oz To Cups quick reference chart

AmountResult
1 fl oz1/8 cup
2 fl oz1/4 cup
4 fl oz1/2 cup
5.33 fl oz2/3 cup
6 fl oz3/4 cup
8 fl oz1 cup
16 fl oz2 cups
32 fl oz4 cups

How to use this tool

  1. Enter the amount from your recipe.
  2. Choose the ingredient, food, style, or unit system.
  3. Read the live result and reference note.
  4. Copy the result or print the chart.

Formula for oz to cups

cups = fluid ounces x fl oz ml / selected cup ml

The calculator keeps the arithmetic visible because kitchen conversions should be checkable, not mysterious.

Full reference chart

Search the table, then tap a heading to sort. Values are rounded only in the display; calculations use the constants embedded in the page.

Pro tips for better kitchen conversions

Data sources and method

This page is intentionally deterministic: no AI model, tracking script, or remote lookup is used for the calculation. The values are hardcoded from kitchen reference constants and public food-safety or nutrition references so the result is repeatable.

Frequently Asked Questions

How many cups is 64 oz?

If 64 oz means US fluid ounces, it equals 8 US cups, because 1 cup is 8 fluid ounces. It also equals 2 quarts or 1/2 gallon. This is a volume conversion for liquids. If 64 oz means weight ounces, the cup result depends on the ingredient. For example, 64 ounces of flour and 64 fluid ounces of milk are not measured the same way.

How many oz in a cup of butter?

One US cup of butter weighs 8 ounces, or about 227 grams. It also equals 16 tablespoons or 2 American butter sticks. This is weight ounces for butter, not fluid ounces. If butter is melted, 1 cup still represents the same volume, but weighing 227 grams is cleaner and more accurate. For pastry and cookies, accurate butter measurement controls richness, spread, and texture.

How many cups is 20 oz?

If you mean 20 US fluid ounces, it equals 2.5 cups, because 1 cup is 8 fluid ounces. This works for water, milk, stock, juice, or other liquids. If you mean 20 ounces by weight, the answer depends on the ingredient. For example, 20 ounces of chocolate chips is not the same cup volume as 20 ounces of flour. Always check the unit type.

How many cups is 6 oz?

If 6 oz means US fluid ounces, it equals 3/4 cup. This is common for milk, water, stock, cream, and juice. If 6 oz is weight, the answer changes by ingredient. Six ounces of chocolate chips is about 1 cup, but 6 ounces of flour is about 1.4 cups. In recipes, fluid ounces measure volume, while ounces alone often measure weight.

How many oz in 3/4 cup?

Three fourths of a US cup equals 6 fluid ounces. The calculation is 8 fluid ounces per cup times 3/4. This is useful for liquids like milk, cream, stock, or oil. For dry ingredients, be careful: 3/4 cup does not always weigh 6 ounces. Flour, sugar, oats, cocoa, and nuts all have different densities, so their weight ounces are different.

How many oz in an Australian cup?

An Australian metric cup is 250 milliliters. That is about 8.45 US fluid ounces, or about 8.8 imperial fluid ounces. Australian tablespoons are also different in many recipes, commonly 20 ml instead of 15 ml. When using Australian recipes, convert the whole recipe carefully. For best results, follow metric milliliters and grams rather than mixing cup systems. This avoids service-time confusion.

How many cups is 24 oz?

If 24 oz means US fluid ounces, it equals 3 cups. This is a direct liquid conversion: 24 divided by 8 equals 3. It is useful for stock, milk, cream, juice, and water. If 24 oz is weight, cups depend on the ingredient. In professional kitchens, write fl oz for volume and oz wt for weight to prevent costly recipe mistakes.

How many oz in a UK imperial cup?

A UK imperial cup is commonly considered 10 imperial fluid ounces, which is about 284 milliliters. This is larger than a US cup, which is 8 US fluid ounces or about 237 milliliters. Because cup sizes differ between countries, recipes can change if converted casually. For international cooking, grams and milliliters are safer, especially in baking and beverages. Label the system on every recipe.

How do I convert oz to cups for cooking?

First decide whether oz means fluid ounces or weight ounces. For US liquid measure, cups = fluid ounces divided by 8. So 16 fl oz equals 2 cups. For weight ounces, you must know the ingredient density. Eight ounces of water is 1 cup, but 8 ounces of flour is not. In recipes, label fluid ounces as fl oz to avoid confusion.

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Disclaimer: Cooking times are estimates. Use a calibrated thermometer for food safety. Nutrition and caffeine values vary by product and preparation.

Primary references include King Arthur Baking, USDA FoodData Central, USDA FSIS and FDA guidance where relevant.