Baking Measurement Conversion Guide: Cups, Grams, Ounces & More

Why Baking Measurements Matter More Than You Think

A cup of flour can weigh anywhere from 120 to 160 grams depending on how you scoop it. That 33% variance is the difference between a tender, fluffy cake and a dense, gummy disaster. Unlike cooking, where a pinch more or less won't ruin dinner, baking is chemistry — and chemistry demands precision.

In 2026, home bakers face a new challenge: the internet has made every recipe in the world accessible, but those recipes use different measurement systems. A French patisserie recipe calls for 200 grams of butter. A classic American cookbook says one cup. A British blog specifies 7 ounces. Without accurate conversions, you're left guessing — and guessing in baking leads to failure.

This guide gives you every conversion you need, plus the context to understand why certain conversions work the way they do.

The Golden Rule: Weight Beats Volume

Professional bakers never measure flour, sugar, or butter by volume. They use a kitchen scale and measure by weight. Here's why:

Ingredient	1 Cup (Volume)	Weight (Grams)	Weight (Ounces)
All-purpose flour	1 cup	125 g	4.4 oz
Bread flour	1 cup	130 g	4.6 oz
Cake flour	1 cup	115 g	4.1 oz
Granulated sugar	1 cup	200 g	7.1 oz
Brown sugar (packed)	1 cup	220 g	7.8 oz
Powdered sugar	1 cup	120 g	4.2 oz
Butter	1 cup (2 sticks)	227 g	8.0 oz
Cocoa powder	1 cup	85 g	3.0 oz
Honey	1 cup	340 g	12.0 oz

Key takeaway: Notice how one cup of different ingredients weighs dramatically different amounts. This is why volume measurements are unreliable for baking. If a recipe specifies grams, use a scale.

Dry Ingredient Conversions

When converting between cups and grams for dry ingredients, density is everything. Here are the most common dry conversions used in baking:

Flour Conversions

• 1 cup all-purpose flour = 125 grams
• 1/2 cup all-purpose flour = 62.5 grams
• 1/3 cup all-purpose flour = 42 grams
• 1/4 cup all-purpose flour = 31 grams
• 1 tablespoon flour = 8 grams
• 1 teaspoon flour = 2.6 grams

Sugar Conversions

• 1 cup granulated sugar = 200 grams
• 1 cup brown sugar (packed) = 220 grams
• 1 cup powdered sugar = 120 grams
• 1 tablespoon granulated sugar = 12.5 grams
• 1 teaspoon granulated sugar = 4.2 grams

The Scooping Problem

Here's what throws most bakers off: the way you fill a measuring cup changes the weight. "Dip and sweep" (dipping the cup into the flour bag and leveling with a knife) gives you about 140-150 grams per cup. "Spoon and level" (spooning flour into the cup and leveling) gives you about 120-125 grams. That's a 20% difference — enough to ruin a recipe.

Best practice: Always use the method the recipe author intended. If they specify "1 cup sifted flour," sift first, then measure. If they say "1 cup flour, sifted," measure first, then sift. The order matters.

Liquid Ingredient Conversions

Liquid measurements are more straightforward because volume is consistent regardless of the ingredient. One cup of water occupies the same space as one cup of milk. However, converting between metric and imperial liquid units requires precision:

Imperial	Metric (Exact)	Metric (Common Rounding)
1 teaspoon	4.929 ml	5 ml
1 tablespoon	14.787 ml	15 ml
1 fluid ounce	29.574 ml	30 ml
1/4 cup	59.147 ml	60 ml
1/3 cup	78.863 ml	80 ml
1/2 cup	118.294 ml	120 ml
2/3 cup	157.725 ml	160 ml
3/4 cup	177.441 ml	175 ml
1 cup	236.588 ml	240 ml
1 pint	473.176 ml	475 ml
1 quart	946.353 ml	950 ml
1 gallon	3,785.41 ml	3.785 L

Note: In most home baking, the rounded values (5 ml per teaspoon, 15 ml per tablespoon) are perfectly fine. The tiny differences won't affect your results. But for large-batch commercial baking or precise recipes like macarons, use the exact values.

Butter Conversions: The Sticky Middle Ground

Butter is technically a solid, but it's often measured in volume (cups, tablespoons) in American recipes. Here's the complete conversion chart:

• 1 cup butter = 2 sticks = 227 grams = 8 ounces
• 1/2 cup butter = 1 stick = 113 grams = 4 ounces
• 1/4 cup butter = 1/2 stick = 57 grams = 2 ounces
• 1 tablespoon butter = 14.2 grams = 0.5 ounces
• 1 teaspoon butter = 4.7 grams = 0.17 ounces

Pro tip: Most butter wrappers in the US have tablespoon markings on the side. One standard stick (1/2 cup) equals 8 tablespoons. This makes it easy to cut precise amounts without a scale.

Temperature Conversions for Baking

Oven temperatures are another common source of confusion. Many European recipes use Celsius or gas marks, while American recipes use Fahrenheit. Here are the most common baking temperatures:

Fahrenheit	Celsius	Gas Mark	Common Use
275°F	135°C	1	Slow roasting, meringues
300°F	150°C	2	Fruit cakes, slow baking
325°F	160°C	3	Cheesecakes, custards
350°F	175°C	4	Cookies, cakes (most common)
375°F	190°C	5	Quick breads, biscuits
400°F	200°C	6	Bread, puff pastry
425°F	220°C	7	Pizza, flatbreads
450°F	230°C	8	Artisan bread, crackers

The formula for converting Fahrenheit to Celsius is: °C = (°F - 32) × 5/9. For example, 350°F becomes (350 - 32) × 5/9 = 318 × 5/9 = 176.7°C, which rounds to 175°C.

Scaling Recipes Up and Down

What if you need to double a recipe, or cut it in half? Here's where things get tricky — especially with eggs.

Simple Scaling (Most Ingredients)

For flour, sugar, butter, milk, and most other ingredients, you can simply multiply or divide. If a recipe calls for 2 cups of flour and you want to make half, use 1 cup. Easy.

The Egg Problem

Eggs don't divide neatly. If a recipe calls for 3 eggs and you want to halve it, you need 1.5 eggs. Here's what to do:

• Crack the egg into a small bowl and whisk it.
• Estimate half by eye, or weigh it: a large egg weighs about 50 grams (without shell).
• Use 25 grams of whisked egg for half an egg.
• Save the rest for scrambled eggs tomorrow morning.

Pan Size Adjustments

When scaling a recipe, you also need to adjust your pan size. A recipe designed for a 9x13-inch pan (117 square inches) won't work in an 8x8-inch pan (64 square inches) — the batter will be too deep and won't cook through. Here's a quick reference:

• 8x8 inch pan = 64 sq in (half of 9x13)
• 9x9 inch pan = 81 sq in
• 9x13 inch pan = 117 sq in
• Two 9-inch round pans = 127 sq in (π × 4.5² × 2)
• 9x5 inch loaf pan = 45 sq in

Common Baking Conversion Mistakes to Avoid

Mistake #1: Treating All "Cups" the Same

A cup of flour and a cup of chocolate chips are very different weights. Flour weighs about 125 grams per cup, while chocolate chips weigh about 170 grams per cup. Always check the specific conversion for your ingredient.

Mistake #2: Confusing Weight Ounces and Fluid Ounces

An ounce of flour by weight (28.35 grams) is very different from a fluid ounce of milk (29.57 ml). Weight ounces measure mass; fluid ounces measure volume. They are not interchangeable. When a recipe says "8 ounces of cream cheese," it means weight (one standard block). When it says "8 ounces of milk," it means volume (one cup).

Mistake #3: Ignoring Altitude Adjustments

If you live above 3,000 feet, standard recipes need modification. Lower air pressure causes baked goods to rise faster and collapse. At 5,000 feet, you typically need to:

• Reduce baking powder by 1/8 to 1/4 teaspoon per teaspoon called for
• Reduce sugar by 1-3 tablespoons per cup
• Increase liquid by 1-4 tablespoons per cup
• Increase oven temperature by 15-25°F

Mistake #4: Using the Wrong Measuring Tools

Liquid measuring cups (the ones with a spout and graduated lines) are designed for liquids. Dry measuring cups (the ones you fill to the top and level off) are designed for dry ingredients. Using a liquid cup for flour will give you inconsistent results because you can't level it properly. Invest in a set of dry measuring cups ($5-10) and a kitchen scale ($15-25) — it's the single best upgrade you can make to your baking.

Quick Reference: The Baker's Dozen Conversions

Here are the 13 conversions every baker should memorize:

1. 1 cup = 16 tablespoons
2. 1 tablespoon = 3 teaspoons
3. 1 cup = 8 fluid ounces (volume)
4. 1 stick of butter = 1/2 cup = 8 tablespoons = 113 grams
5. 1 cup all-purpose flour = 125 grams
6. 1 cup granulated sugar = 200 grams
7. 1 cup butter = 227 grams
8. 1 large egg = 50 grams (without shell)
9. 1 ounce = 28.35 grams
10. 1 pound = 453.59 grams
11. 1 liter = 4.23 cups
12. 1 kilogram = 2.2 pounds
13. 350°F = 175°C (the most common baking temperature)

Frequently Asked Questions

How do I convert a recipe from cups to grams?

You can't use a single conversion factor because different ingredients have different densities. One cup of flour weighs 125 grams, but one cup of sugar weighs 200 grams. Use an ingredient-specific conversion chart (like the one above) or a kitchen scale. The most accurate method is to weigh each ingredient individually rather than trying to convert the entire recipe with one multiplier.

Is a US cup the same as a UK cup?

No. A US cup is 236.59 ml, while a UK (imperial) cup is 284.13 ml — about 20% larger. Most modern UK recipes use metric measurements (grams and milliliters) rather than cups, but older British cookbooks may use the imperial cup. When in doubt, check the publication date and country of origin. Australian recipes use a 250 ml cup, which is close to the US cup but not identical.

How many grams is a cup of butter?

One cup of butter equals 227 grams (8 ounces). In the US, butter is sold in 1-pound packages containing 4 sticks. Each stick is 1/2 cup (113 grams) and is marked with tablespoon lines for easy measuring.

Can I use a liquid measuring cup for flour?

Technically you can, but it's not recommended. Dry measuring cups are designed to be filled to the top and leveled off with a straight edge, giving you a precise volume. Liquid measuring cups have a spout and graduated lines meant for reading the meniscus of a liquid. For the most accurate results, use dry measuring cups for dry ingredients and liquid measuring cups for liquids. Even better: use a kitchen scale and measure by weight.

What's the difference between a tablespoon and a dessert spoon?

A standard tablespoon holds 15 ml (3 teaspoons). A dessert spoon, used in some Australian and UK recipes, holds 10 ml (2 teaspoons). A teaspoon is 5 ml across all systems. If a recipe from the UK or Australia mentions a "dessert spoon," use 10 ml. When in doubt, check the recipe's country of origin and look for a conversion note.

How do I measure sticky ingredients like honey or molasses?

Lightly coat your measuring spoon or cup with cooking spray or oil before adding the sticky ingredient. It will slide right out. For honey specifically, you can also warm the measuring tool slightly — run it under hot water and dry it first. One cup of honey weighs 340 grams, which is significantly heavier than one cup of water (237 grams) due to its density.

Baking is a skill that rewards precision. With these conversions in your toolkit, you can confidently tackle recipes from any country, any cookbook, and any era — and get consistent, delicious results every time.