You’re standing in the kitchen. Flour is everywhere. You’ve found a killer sourdough recipe from a baker in Berlin, but everything is in metric. Your scale? It’s stuck on imperial. Now you're staring at the screen wondering exactly how many oz is 180 grams because, let’s be honest, winging it with bread is a recipe for a very expensive doorstop.
Precision matters.
In the world of weight, 180 grams equals 6.35 ounces.
That’s the short answer. But if you're doing something like high-hydration baking or measuring out specific coffee yields, those tiny decimals following the 6 actually carry some weight. Most people just round it to 6.4 oz and call it a day. That's usually fine for a smoothie, but it might mess up a delicate macaron.
Why 180 Grams to Oz Isn't Just One Number
Here is where it gets kinda annoying. There isn't just one "ounce."
When we talk about how many oz is 180 grams, we are almost always talking about avoirdupois ounces. That’s the standard unit used in the US for dry goods like pasta, flour, or even your mail. But if you are a jeweler or you're handling precious metals, you’re using Troy ounces.
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For the record, 180 grams in Troy ounces is roughly 5.79 oz.
See the problem? If you use the wrong conversion for gold, you’re losing a lot of money. If you use it for flour, your cake is going to be dry. Most digital scales you buy at Target or on Amazon default to the standard 28.35 grams per ounce ratio.
The Math You Can Actually Do in Your Head
Nobody wants to pull out a calculator while their hands are covered in dough. If you need a quick "good enough" estimate, remember that 30 grams is roughly one ounce.
Is it exact? No.
180 divided by 30 gives you 6 ounces. You’re off by about a third of an ounce. In a large batch of chili, who cares? In a 180g serving of protein, that’s a negligible difference in macros. But if you’re a stickler for the rules, you use the real multiplier: 0.035274.
$$180 \times 0.035274 = 6.34932$$
Basically, 6.35 oz.
The Liquid Confusion: Ounces vs. Fluid Ounces
I see this mistake constantly. Someone sees "180g" in a recipe for milk or water and they switch their scale to "fl oz."
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Stop.
Fluid ounces measure volume. Grams measure mass. They are not the same thing unless you are measuring pure water at a specific temperature. 180 grams of water is indeed roughly 6.08 fluid ounces because water has a density of roughly 1g/ml. But 180 grams of honey? That’s way less volume because honey is dense. 180 grams of feathers? That’s a whole pillow.
If your recipe lists 180g, stick to the weight setting on your scale. If you must convert how many oz is 180 grams for a liquid, use a dry weight scale first to be safe.
Real World Examples of 180 Grams
What does this weight actually look like in your hand?
- A Large Apple: A decent-sized Honeycrisp usually clocks in right around 180 to 200 grams.
- Three Large Eggs: Usually, a large egg (out of the shell) is about 50-60 grams. Three of them get you right to that 180g mark.
- A Cup of Flour: Sorta. Depending on how you scoop it, a cup of all-purpose flour is usually 120g to 150g. So 180g is about a cup and a half.
- Six Slices of Bread: Standard sandwich bread is roughly 28-30g per slice.
Why European Recipes Love 180g
If you do a lot of international cooking, you’ll notice 180g pops up a lot. It’s a common "middle ground" weight for cake tins or yogurt portions in Europe. US recipes tend to round to the nearest quarter or half cup, which leads to "cup creep"—the phenomenon where your measurements get less accurate the more you cook.
Weight doesn't lie.
180 grams is 180 grams whether you’re in London, Tokyo, or Chicago. Ounces? They're fussy.
The Precision Trap
Is 6.35 oz always better than 180g?
Honestly, no. Grams are inherently more precise for home use because they are a smaller unit of measurement. Most consumer kitchen scales have a margin of error of +/- 1 gram. When you’re working in ounces, that margin of error can represent a larger percentage of the total weight if the scale isn't sensitive enough to catch the hundredths of an ounce.
If you're tracking macros for fitness, 180g of chicken breast is a standard "filling" portion. It’s about 54 grams of protein. If you accidentally measure 6 oz instead of 6.35 oz because your scale rounded down, you’re missing out on a few grams of protein. Over a year, that adds up.
How to Calibrate for Accuracy
If you're skeptical about your scale's ability to tell you how many oz is 180 grams, test it.
Find a nickel. A US nickel weighs exactly 5.000 grams. Put 36 nickels on your scale. If it doesn't say 180g or 6.35 oz, your scale is lying to you.
Cheap scales often struggle with "drift," where the weight changes as the item sits on the sensor. If you're weighing out 180g of coffee beans for a large carafe, watch the screen for a few seconds. If it jumps from 6.3 to 6.5, it’s time for new batteries or a better brand like Oxo or Jennings.
Beyond the Kitchen: Shipping and Postage
If you’re mailing a package that weighs 180 grams, you need to know the ounce count for USPS or FedEx. They usually round up.
At 6.35 oz, you’re over the 6 oz limit. You’ll be paying the 7 oz rate. This is where knowing the conversion saves you from having your package returned for "postage due."
Actionable Steps for Perfect Conversions
Stop guessing. If you want to master the 180g conversion and keep your results consistent, follow these steps.
Get a Dual-Mode Scale
Ensure your scale toggles between grams and ounces with a single button. It eliminates the need for mental math entirely.
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Ignore Volume for Solids
Never use a measuring cup to "estimate" 180 grams of a dry ingredient. Use the weight.
Watch the "Tare"
Always place your bowl on the scale first, hit "tare" or "zero," then pour until you hit 180g. It sounds basic, but failing to tare is the number one reason recipes fail.
Memorize the 28.35 Constant
If you ever find yourself without an internet connection and need to know how many oz is 180 grams, just remember 28.35. Divide your grams by that number.
The reality is that 180 grams is a "heavy" small portion or a "light" large portion. It’s the weight of a standard hamster, a small steak, or a very large smartphone. Whether you call it 180g or 6.35 oz, the physical mass remains the same—just make sure your scale is telling you the truth.