Ounces to Grams

Convert US recipe weights to metric in one step.

Ounces to Grams Calculator
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Formula: g = oz × 28.3495

Ounces to Grams Reference Table

ouncesgrams
0.514.17
128.35
256.7
4113.4
6170.1
8226.8
12340.19
16453.59
24680.39
32907.18

About This Ounces to Grams Converter

If you are following a recipe from an American food blog or cookbook and your kitchen scale only reads in grams, this is your go-to converter. The US baking world is still heavily ounce-based, while almost everywhere else uses grams as the default.

One important distinction: troy ounces (used for precious metals) and avoirdupois ounces (used in cooking) are not the same — cooking ounces are avoirdupois, where 1 oz = 28.3495 grams exactly. This tool uses the cooking standard.

What surprises many home cooks: the math has a few very clean anchor points worth memorising. 1 oz ≈ 28g, 4 oz ≈ 113g, 8 oz ≈ 227g (that is one cup of butter), and 16 oz = 454g (roughly 1 pound). Those four numbers will get you through 90% of American recipes without needing a converter at all.

Tool Features

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Live conversion as you type
The gram result updates with every keystroke — no submit button to click.
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Recipe-range reference table
Covers 0.5 oz to 32 oz — the full range you will actually encounter in recipes.
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Transparent formula shown
The formula (g = oz x 28.3495) is displayed on the page so you can spot-check results.
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Works on any screen size
Optimised for phones — perfect for propping next to your kitchen scale.

The Formula: Ounces to Grams

g = oz × 28.3495

This conversion uses a fixed international factor — the result is mathematically exact for any input value you enter. The factor itself is defined by international standards bodies (NIST/SI) and is not subject to any rounding for everyday kitchen use.

tips_and_updates Pro Tips for Ounces to Grams

  • A stick of US butter is exactly 4 oz = 113.4 g. Two sticks = 8 oz = 227 g = 1 cup.
  • US "pounds and ounces" labels: convert lb to oz first (1 lb = 16 oz), then multiply by 28.3495.
  • Fluid ounces and weight ounces are different. 8 fl oz of water weighs ~227 g, but 8 fl oz of honey weighs ~340 g.
  • For baking, round to the nearest gram — sub-gram precision does not meaningfully affect recipe outcomes.

check_circle When to Use This Tool

Use this whenever a US recipe specifies weight in ounces (e.g. "6 oz cream cheese") and your scale or recipe system uses grams. Also essential when reading US nutrition panels alongside metric packages.

auto_stories Did You Know?

In the US, the same "oz" symbol is used for both weight and volume, causing endless confusion. The UK sensibly uses "fl oz" for fluid ounces to distinguish the two — always check context when a US recipe says oz!

Other Tools
fact_check Quick Facts
  • 1 oz = 28.3495 g (avoirdupois)
  • 4 oz = 113.4 g (1/4 lb)
  • 8 oz = 226.8 g = 1 cup butter
  • 16 oz = 453.6 g = 1 lb
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Looking to convert grams to cups for specific ingredients?

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