The Ultimate Ounces to Grams (oz → g) Converter

The definitive guide to converting ounces to grams. Understand why grams are the global standard for baking precision and unlock a world of international recipes.

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Common Baking Conversions

Weight

  • 1 cup all-purpose flour ≈ 125g
  • 1 cup granulated sugar ≈ 200g
  • 1 cup brown sugar ≈ 220g
  • 1 stick butter = 113g
  • 1 large egg ≈ 50g

Volume

  • 1 cup = 237ml = 16 tbsp
  • 1 tbsp = 3 tsp = 15ml
  • 1 fl oz = 30ml = 2 tbsp
  • 1 liter = 4.23 cups
  • 1 gallon = 3.785 liters

Temperature

  • 350°F = 175°C = Gas Mark 4
  • 375°F = 190°C = Gas Mark 5
  • 400°F = 200°C = Gas Mark 6
  • 425°F = 220°C = Gas Mark 7
  • 450°F = 230°C = Gas Mark 8

Pro tip: For accuracy in baking, always prefer weight measurements (grams) over volume measurements (cups).

The Bridge to a World of Better Baking

You've found an amazing cookie recipe from a top US food blogger, but the ingredients are in ounces. How do you translate that to the grams your scale uses? Or perhaps you're an American baker wanting to adopt the metric system for its renowned precision. This guide is your bridge to a global community of bakers who have embraced the power and simplicity of grams.

Why the World Bakes in Grams: A Baker's Manifesto

Switching from ounces to grams isn't just a change in numbers; it's a fundamental upgrade to your baking philosophy. Here's why grams will make you a better, more confident baker.

1. "Pixel-Perfect" Precision

A gram is a much smaller unit than an ounce (1 oz ≈ 28.35g). This allows for incredible precision, which is critical for potent ingredients like yeast or salt, where a tiny variance can dramatically alter the final result.

2. The End of Awkward Fractions

Professional recipes thrive on simplicity. Which is easier to measure: "15g of salt" or "0.53 oz of salt"? Grams eliminate clumsy decimals and fractions, making recipes cleaner and easier to follow.

3. The Magic of Scalability

Doubling a recipe with 125g of flour is simple: you need 250g. Doubling a recipe with 4.4 oz of flour requires a calculator. Grams make scaling recipes effortless. This is the foundation of the Baker's Percentage system, the language of all professional bakers.

Baking Landmarks: Essential Ounce to Gram Conversions

Memorize these key "landmarks" to navigate any American recipe with ease.

The Stick of Butter: 4 oz = 113g

This is the cornerstone of American baking. For a deep dive into this unique ingredient, see our Butter Stick Guide.

The Cup of Flour: approx. 4.4 oz = 125g

This is the professional standard for 1 cup of all-purpose flour, but this can vary wildly. It's a perfect example of why weighing is superior. Learn more at our Cups to Grams Science Guide.

The Pound: 16 oz = 454g

The foundation of the classic Pound Cake and the standard for buying ingredients like butter and flour in the US. Need to convert larger amounts? Our Pounds to Grams Converter can help.

Baking Clinic

Problem: I converted all the ounces in my recipe to grams, but my bake still failed!

Diagnosis: You've likely fallen into the most common imperial-to-metric trap: **confusing weight ounces (oz) with fluid ounces (fl oz)**. A recipe calling for '8 oz of milk' means 1 cup by *volume*, not 227g by *weight*. They are not the same!

Solution: Weight conversions only apply to ingredients listed by weight. For liquids listed in ounces, the recipe almost always means fluid ounces. Our guide on ml to cups can help you navigate liquid measurements.

Frequently Asked Questions

Q: What is the exact conversion factor for ounces to grams?

A: The internationally accepted conversion factor is **1 avoirdupois ounce = 28.349523125 grams**. For nearly all baking purposes, rounding to **28.35** is more than precise enough.

Q: How do I convert grams back to ounces?

A: Easy! You can use our dedicated Grams to Ounces Converter. The mathematical formula is to divide the number of grams by 28.35.

Q: Why should I trust grams more than ounces?

A: It's a matter of precision. Because a gram is a smaller unit, it allows you to be more accurate, especially with small quantities. Measuring 5g of salt is easy on a digital scale, but measuring its equivalent, 0.18 oz, is much harder. Grams remove ambiguity and are the global standard in science and professional pastry.