Cups to Ounces Converter
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One US cup is 8 fluid ounces. By weight it depends on what is in the cup: a cup of water is about 8.4 oz, butter about 8 oz, all-purpose flour about 4.2 oz and granulated sugar about 7 oz.
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Your result
1 US cup equals 8 US fluid ounces. In kitchen terms that is about 8 fl oz. Weighed, that much all-purpose flour is about 4.233 oz (120 g).
Conversion factor
- 1 US cup = 8 US fluid ounces
- 1 US fluid ounce = 0.125 US cups
- US cup = 236.588 mL
- US fluid ounce = 29.5735 mL, one eighth of a US cup
- All-purpose flour: 120 g per US cup, about 0.5072 g per mL (King Arthur Baking).
Show the steps
- Amount: 1 US cup.
- To milliliters: 1 × 236.5882365 mL = 236.5882365 mL.
- To US fluid ounces: 236.5882365 ÷ 29.57352956 mL = 8.
Weights are typical values for the product and measuring method named in the source. Packing, humidity and brand change a cup of flour by 10 percent or more, so weigh when a recipe is fussy.
Quick lookup chart: US cups to US fluid ounces
Every row is calculated live from the same factor shown above, for all-purpose flour.
| US cups | US fluid ounces | ounces (weight) | grams | milliliters |
|---|---|---|---|---|
| ⅛ | 1 fl ozKitchen: 1 fl oz | 0.52911 ozKitchen: ½ oz | 15 gKitchen: 15 g | 29.574 mLKitchen: 30 mL |
| ¼ | 2 fl ozKitchen: 2 fl oz | 1.0582 ozKitchen: 1 oz | 30 gKitchen: 30 g | 59.147 mLKitchen: 60 mL |
| ⅓ | 2.6667 fl ozKitchen: 2 ¾ fl oz | 1.411 ozKitchen: 1 ⅜ oz | 40 gKitchen: 40 g | 78.863 mLKitchen: 80 mL |
| ⅜ | 3 fl ozKitchen: 3 fl oz | 1.5873 ozKitchen: 1 ⅝ oz | 45 gKitchen: 45 g | 88.721 mLKitchen: 90 mL |
| ½ | 4 fl ozKitchen: 4 fl oz | 2.1164 ozKitchen: 2 ⅛ oz | 60 gKitchen: 60 g | 118.29 mLKitchen: 120 mL |
| ⅔ | 5.3333 fl ozKitchen: 5 ¼ fl oz | 2.8219 ozKitchen: 2 ⅞ oz | 80 gKitchen: 80 g | 157.73 mLKitchen: 160 mL |
| ¾ | 6 fl ozKitchen: 6 fl oz | 3.1747 ozKitchen: 3 ⅛ oz | 90 gKitchen: 90 g | 177.44 mLKitchen: 180 mL |
| ⅞ | 7 fl ozKitchen: 7 fl oz | 3.7038 ozKitchen: 3 ¾ oz | 105 gKitchen: 105 g | 207.01 mLKitchen: 210 mL |
| 1 | 8 fl ozKitchen: 8 fl oz | 4.2329 ozKitchen: 4 ¼ oz | 120 gKitchen: 120 g | 236.59 mLKitchen: 240 mL |
| 1 ½ | 12 fl ozKitchen: 12 fl oz | 6.3493 ozKitchen: 6 ⅜ oz | 180 gKitchen: 180 g | 354.88 mLKitchen: 350 mL |
| 2 | 16 fl ozKitchen: 16 fl oz | 8.4658 ozKitchen: 8 ½ oz | 240 gKitchen: 240 g | 473.18 mLKitchen: 470 mL |
| 3 | 24 fl ozKitchen: 24 fl oz | 12.699 ozKitchen: 12 ¾ oz | 360 gKitchen: 360 g | 709.76 mLKitchen: 710 mL |
| 4 | 32 fl ozKitchen: 32 fl oz | 16.932 ozKitchen: 16 ⅞ oz | 480 gKitchen: 480 g | 946.35 mLKitchen: 950 mL |
Common recipe fractions of a cup
Exact answers keep every digit. Kitchen answers round to what a measuring cup, spoon or scale can show.
| Recipe amount (US cup) | US tablespoons | US fluid ounces | milliliters | ounces (weight) | grams |
|---|---|---|---|---|---|
| ⅛ | 2 tbspKitchen: 2 tbsp | 1 fl ozKitchen: 1 fl oz | 29.574 mLKitchen: 30 mL | 0.52911 ozKitchen: ½ oz | 15 gKitchen: 15 g |
| ¼ | 4 tbspKitchen: 4 tbsp | 2 fl ozKitchen: 2 fl oz | 59.147 mLKitchen: 60 mL | 1.0582 ozKitchen: 1 oz | 30 gKitchen: 30 g |
| ⅓ | 5.3333 tbspKitchen: 5 tbsp 1 tsp | 2.6667 fl ozKitchen: 2 ¾ fl oz | 78.863 mLKitchen: 80 mL | 1.411 ozKitchen: 1 ⅜ oz | 40 gKitchen: 40 g |
| ⅜ | 6 tbspKitchen: 6 tbsp | 3 fl ozKitchen: 3 fl oz | 88.721 mLKitchen: 90 mL | 1.5873 ozKitchen: 1 ⅝ oz | 45 gKitchen: 45 g |
| ½ | 8 tbspKitchen: 8 tbsp | 4 fl ozKitchen: 4 fl oz | 118.29 mLKitchen: 120 mL | 2.1164 ozKitchen: 2 ⅛ oz | 60 gKitchen: 60 g |
| ⅝ | 10 tbspKitchen: 10 tbsp | 5 fl ozKitchen: 5 fl oz | 147.87 mLKitchen: 150 mL | 2.6455 ozKitchen: 2 ⅝ oz | 75 gKitchen: 75 g |
| ⅔ | 10.667 tbspKitchen: 10 tbsp 2 tsp | 5.3333 fl ozKitchen: 5 ¼ fl oz | 157.73 mLKitchen: 160 mL | 2.8219 ozKitchen: 2 ⅞ oz | 80 gKitchen: 80 g |
| ¾ | 12 tbspKitchen: 12 tbsp | 6 fl ozKitchen: 6 fl oz | 177.44 mLKitchen: 180 mL | 3.1747 ozKitchen: 3 ⅛ oz | 90 gKitchen: 90 g |
| ⅞ | 14 tbspKitchen: 14 tbsp | 7 fl ozKitchen: 7 fl oz | 207.01 mLKitchen: 210 mL | 3.7038 ozKitchen: 3 ¾ oz | 105 gKitchen: 105 g |
| 1 | 16 tbspKitchen: 16 tbsp | 8 fl ozKitchen: 8 fl oz | 236.59 mLKitchen: 240 mL | 4.2329 ozKitchen: 4 ¼ oz | 120 gKitchen: 120 g |
Weight of 1 US cup for each ingredient
One amount, every ingredient. Densities come from USDA FoodData Central and the King Arthur Baking chart, listed per US cup below. Pick the row that matches your product, and weigh when accuracy matters.
| Ingredient | Ounces (weight) | Grams | Per US cup | Source |
|---|---|---|---|---|
| Flours and starches | ||||
| All-purpose flour | 4.233 ozKitchen: 4 ¼ oz | 120 gKitchen: 120 g | 120 g | King Arthur |
| Bread flour | 4.233 ozKitchen: 4 ¼ oz | 120 gKitchen: 120 g | 120 g | King Arthur |
| Whole wheat flour | 3.986 ozKitchen: 4 oz | 113 gKitchen: 113 g | 113 g | King Arthur |
| Pastry flour | 3.739 ozKitchen: 3 ¾ oz | 106 gKitchen: 106 g | 106 g | King Arthur |
| Self-rising flour | 3.986 ozKitchen: 4 oz | 113 gKitchen: 113 g | 113 g | King Arthur |
| Almond flour | 3.386 ozKitchen: 3 ⅜ oz | 96 gKitchen: 96 g | 96 g | King Arthur |
| Coconut flour | 4.515 ozKitchen: 4 ½ oz | 128 gKitchen: 128 g | 128 g | King Arthur |
| Cornstarch | 3.951 ozKitchen: 4 oz | 112 gKitchen: 112 g | 112 g | King Arthur |
| Cornmeal (yellow, whole grain) | 4.303 ozKitchen: 4 ¼ oz | 122 gKitchen: 122 g | 122 g | USDA |
| Cocoa powder (unsweetened) | 2.963 ozKitchen: 3 oz | 84 gKitchen: 84 g | 84 g | King Arthur |
| Rolled oats (old-fashioned) | 3.139 ozKitchen: 3 ⅛ oz | 89 gKitchen: 89 g | 89 g | King Arthur |
| Sugars and sweeteners | ||||
| Granulated sugar | 6.984 ozKitchen: 7 oz | 198 gKitchen: 198 g | 198 g | King Arthur |
| Brown sugar (packed) | 7.513 ozKitchen: 7 ½ oz | 213 gKitchen: 213 g | 213 g | King Arthur |
| Powdered sugar (unsifted) | 3.986 ozKitchen: 4 oz | 113 gKitchen: 113 g | 113 g | King Arthur |
| Honey | 11.96 ozKitchen: 12 oz | 339 gKitchen: 339 g | 339 g | USDA |
| Maple syrup | 11.11 ozKitchen: 11 ⅛ oz | 315 gKitchen: 315 g | 315 g | USDA |
| Molasses | 11.89 ozKitchen: 11 ⅞ oz | 337 gKitchen: 337 g | 337 g | USDA |
| Corn syrup (light) | 12.03 ozKitchen: 12 oz | 341 gKitchen: 341 g | 341 g | USDA |
| Dairy and fats | ||||
| Butter | 8.007 ozKitchen: 8 oz | 227 gKitchen: 227 g | 227 g | USDA |
| Vegetable shortening | 7.231 ozKitchen: 7 ¼ oz | 205 gKitchen: 205 g | 205 g | USDA |
| Lard | 7.231 ozKitchen: 7 ¼ oz | 205 gKitchen: 205 g | 205 g | USDA |
| Vegetable oil | 7.69 ozKitchen: 7 ¾ oz | 218 gKitchen: 218 g | 218 g | USDA |
| Olive oil | 7.619 ozKitchen: 7 ⅝ oz | 216 gKitchen: 216 g | 216 g | USDA |
| Coconut oil (melted) | 7.69 ozKitchen: 7 ¾ oz | 218 gKitchen: 218 g | 218 g | USDA |
| Whole milk | 8.607 ozKitchen: 8 ⅝ oz | 244 gKitchen: 244 g | 244 g | USDA |
| Skim milk | 8.642 ozKitchen: 8 ⅝ oz | 245 gKitchen: 245 g | 245 g | USDA |
| Half and half | 8.536 ozKitchen: 8 ½ oz | 242 gKitchen: 242 g | 242 g | USDA |
| Heavy cream | 8.395 ozKitchen: 8 ⅜ oz | 238 gKitchen: 238 g | 238 g | USDA |
| Plain yogurt (whole milk) | 8.642 ozKitchen: 8 ⅝ oz | 245 gKitchen: 245 g | 245 g | USDA |
| Sour cream | 8.007 ozKitchen: 8 oz | 227 gKitchen: 227 g | 227 g | King Arthur |
| Cream cheese | 8.007 ozKitchen: 8 oz | 227 gKitchen: 227 g | 227 g | King Arthur |
| Peanut butter (smooth) | 9.101 ozKitchen: 9 ⅛ oz | 258 gKitchen: 258 g | 258 g | USDA |
| Liquids | ||||
| Water | 8.36 ozKitchen: 8 ⅜ oz | 237 gKitchen: 237 g | 237 g | USDA |
| Vinegar (distilled) | 8.395 ozKitchen: 8 ⅜ oz | 238 gKitchen: 238 g | 238 g | USDA |
| Pantry and extras | ||||
| Table salt | 10.3 ozKitchen: 10 ¼ oz | 292 gKitchen: 292 g | 292 g | USDA |
| Kosher salt (Diamond Crystal) | 4.515 ozKitchen: 4 ½ oz | 128 gKitchen: 128 g | 128 g | King Arthur |
| Kosher salt (Morton) | 9.03 ozKitchen: 9 oz | 256 gKitchen: 256 g | 256 g | King Arthur |
| White rice (long grain, raw) | 6.526 ozKitchen: 6 ½ oz | 185 gKitchen: 185 g | 185 g | USDA |
| Chocolate chips | 5.997 ozKitchen: 6 oz | 170 gKitchen: 170 g | 170 g | King Arthur |
| Walnuts (chopped) | 3.986 ozKitchen: 4 oz | 113 gKitchen: 113 g | 113 g | King Arthur |
| Almonds (whole) | 5.009 ozKitchen: 5 oz | 142 gKitchen: 142 g | 142 g | King Arthur |
| Raisins (loose) | 5.256 ozKitchen: 5 ¼ oz | 149 gKitchen: 149 g | 149 g | King Arthur |
No ingredient matches that filter.
Same number of cups, five different cups
1 cups in each standard. A recipe written for one cup size and measured with another is a common reason a bake goes wrong.
| Cup standard | One cup | 1 cups in mL | In US fluid ounces | Versus US cup |
|---|---|---|---|---|
| US cup236.588 mL | 236.5882 mL | 236.588 mLKitchen: 240 mL | 8 fl oz | baseline |
| US legal cup240 mL, the nutrition label cup | 240 mL | 240 mLKitchen: 240 mL | 8.1154 fl oz | +1.44% |
| metric cup250 mL, used in Australia, New Zealand and Canada | 250 mL | 250 mLKitchen: 250 mL | 8.4535 fl oz | +5.67% |
| UK half-pint cup10 imperial fl oz, 284.131 mL (older UK kitchen cup) | 284.1306 mL | 284.131 mLKitchen: 280 mL | 9.6076 fl oz | +20.1% |
| Japanese cup200 mL (a rice cooker cup is 180 mL) | 200 mL | 200 mLKitchen: 200 mL | 6.7628 fl oz | −15.5% |
Cups to ounces: two different answers
A US cup holds 8 US fluid ounces. That never changes, because cups and fluid ounces both measure volume. The trouble starts when a recipe says ounces and means weight. A cup of water weighs about 8.4 ounces, a cup of all-purpose flour weighs about 4.2 ounces, and a cup of honey weighs nearly 12. This converter shows the volume answer and the weight answer side by side, so you can see which one you need.
How to use it
- Type the number of cups. Fractions such as 1 1⁄2 or 3⁄4 work.
- Choose the cup your recipe uses: US, US legal (240 mL), metric (250 mL), UK half-pint (284 mL) or Japanese (200 mL).
- Pick the ingredient to see its weight in ounces and grams.
- Switch between Exact and Kitchen rounding, or scale the recipe up or down.
Which ounce do I need?
- Fluid ounces measure how much space a liquid takes up. Use them when the recipe says "fl oz" or when you pour from a measuring cup.
- Ounces by weight measure how heavy something is. Use them when you put the ingredient on a kitchen scale.
- UK fluid ounces are slightly smaller than US ones (28.41 mL against 29.57 mL), so a UK pint has 20 of them and a US pint has 16.
Why these weights can differ from other charts
Liquids, fats and syrups use USDA FoodData Central household measures. Flours, sugars, cocoa, oats and nuts use the King Arthur Baking chart, which assumes a cup that is spooned and leveled. King Arthur lists water at 227 g per cup, which is exactly 8 ounces by weight. A US cup of water physically holds about 237 g (8.35 oz), so this page uses the USDA figure for liquids. Where the two sources disagree for a dry ingredient, the note beside the ingredient says so.
Practice questions
Quiz complete
Sources
- NIST SP 811, Appendix B.8: conversion factors for US customary units
- 21 CFR 101.9(b)(5)(viii): household measures for nutrition labeling (FDA)
- USDA FoodData Central, SR Legacy: household measure gram weights
- King Arthur Baking: Ingredient Weight Chart
- Weights and Measures Act 1985, Schedule 1 (UK imperial gallon and fluid ounce)
Quick check: test yourself
Question 1. How many US fluid ounces are in 1 US cup?
Question 2. A recipe calls for 8 oz of flour by weight. About how many cups is that?
Question 3. Which weighs more, 1 cup of water or 1 cup of all-purpose flour?
Common questions
How many ounces are in a cup?
One US cup is 8 US fluid ounces. In weight, the number depends on the ingredient: about 8.4 oz for water, 8 oz for butter, 4.2 oz for all-purpose flour and 7 oz for granulated sugar.
How many ounces are in a cup of flour?
About 4.2 ounces (120 g) for all-purpose flour that is spooned into the cup and leveled. USDA lists 125 g (4.4 oz). Scooping straight from the bag packs more flour into the cup.
Is a cup of water 8 ounces?
It is 8 fluid ounces by volume. By weight a US cup of water is about 8.35 ounces (237 g), so the two numbers are close but not equal.
How many ounces are in a UK or metric cup?
A metric cup (250 mL) is 8.45 US fluid ounces. A UK half-pint cup (284.13 mL) is 9.61 US fluid ounces, or exactly 10 imperial fluid ounces.
How many cups are in 16 ounces?
16 US fluid ounces is 2 cups. 16 ounces of flour by weight is about 3.8 cups, and 16 ounces of butter by weight is 2 cups (4 sticks).
Should I use a liquid or a dry measuring cup?
Both hold the same volume. A spouted liquid cup is easier to read for liquids, and a dry cup can be leveled with a knife for flour and sugar.
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