Grams to Ounces Conversion: Chart for Cooking and Shipping

I was standing in the shipping aisle doing math on my phone… and it still felt wrong

I was holding a little padded mailer, a kitchen scale from home was still fresh in my mind, and I’m staring at the postal counter screen thinking, “Why does 227 grams feel like it should be 8 ounces, but the number I’m getting is… not that?” I mean, I’ve been around construction and jobsite math forever, and unit conversions still manage to trip you up when you’re in a hurry.

So yeah, grams to ounces is one of those things you think you know until you’re trying to ship something before the cutoff, or you’re doubling a recipe and the only scale you’ve got is set to grams.

One conversion. Two different worlds: cooking and shipping.

The conversion itself is simple (until you’re rushing)

Here’s the whole deal: ounces (oz) are a smaller unit than pounds, and grams (g) are smaller than kilograms, and the two systems don’t “line up” nicely. So you end up with a weird constant that you either memorize or you keep re-googling like the rest of us.

And if you want it the other way around:

I had no idea what “avoirdupois” meant at first. I nodded like I understood. I didn’t. It’s basically just the normal ounce you see on food labels and shipping scales (not the fancy troy ounce used for precious metals).

So if you’ve got 100 grams, you do 100 ÷ 28.3495 = 3.53 ounces, give or take.

If you want to sanity-check without doing long division, 28 grams is about 1 ounce. Not perfect, but it’ll keep you from making a truly wild mistake.

Grams to ounces chart (the one you actually use)

This is the part people want: a quick chart you can glance at while you’ve got flour on your hands or you’re holding a box cutter and trying not to slice your tape roll in half.

Grams (g)	Ounces (oz)	Common “real life” use
28 g	1.0 oz	Small snack portion, spices, light mailer
50 g	1.8 oz	Yeast + sugar + salt kind of bundle
100 g	3.5 oz	Chocolate bar size, small parts shipment
200 g	7.1 oz	Single serving of something dense, small book
227 g	8.0 oz	“Half a pound” vibe in recipes (close enough)
250 g	8.8 oz	Butter block in metric recipes, coffee beans
300 g	10.6 oz	Protein portion, boxed hardware
454 g	16.0 oz	About 1 pound (this one matters)
500 g	17.6 oz	Half-kilo anything (pasta, rice, nails)
1000 g	35.3 oz	1 kilogram (bigger shipping parcels)

That 454 g = 16 oz line is the anchor. If you remember nothing else, remember that one. Everything else is just scooting up or down from there.

And yes, 227 g being basically 8 oz is why you’ll see it pop up in older recipes that got “converted” from cups and sticks and whatever.

Cooking vs shipping: same math, different ways to mess it up

Cooking mistakes usually taste bad. Shipping mistakes usually cost money. Both are annoying.

Cooking: If a bread recipe calls for 350 g of flour and you accidentally treat that like 350 oz (you won’t, but still), you’re done. More realistically, you’ll do the conversion correctly but round too aggressively. If you’re baking, rounding 350 g to 12 oz is a noticeable change because 350 g is actually about 12.35 oz. That extra bit matters more in baking than it does in, say, a stew.

Shipping: Shipping scales and carrier pricing often care about thresholds. Like you’re fine up to 8 oz, then you’re in the next bracket. So 230 g (about 8.11 oz) can bump you up even though it feels basically the same as 227 g. That’s the kind of “ugh” moment where you start pulling out packing peanuts like they’re made of lead.

But here’s a trick I use: if you’re trying to hit an ounce limit, convert the limit to grams instead of converting your grams to ounces. It’s less mental gymnastics.

Example: you need to stay under 8 oz.

8 oz × 28.3495 = 226.8 g.

So if your scale says 229 g, you already know you’re over. No debating with yourself.

And if you don’t want to do any of that by hand, that’s literally why I built calculators. Use a unit converter, check the number, move on with your day.

Here are a few tools I keep open in a tab because I’m constantly bouncing between “shop math” and “life math”:

for discounts and markups (because every receipt seems to have a surprise).

Fraction calculator for recipe halving when the original author thought 1/3 cup was a reasonable unit.

for scaling spice blends without guessing.

for figuring typical package weight when you’ve got a batch of orders.

when you need a clean number but you don’t want to round the wrong way (it happens).

And for this exact problem, I like having the converter right in the page.

The “worked example” I wish someone showed me sooner

But say you don’t have a calculator handy, or you’re just trying to understand what’s happening so you can eyeball it.

Scenario: You’ve got a recipe calling for 180 g of chopped nuts. Your measuring cup is useless for nuts (air gaps everywhere), so you’re using a scale. But your scale is set to ounces because you were weighing a package earlier.

Here’s the step-by-step:

1. Start with 180 g.
2. Divide by 28.3495.
3. 180 ÷ 28.3495 = about 6.35 oz.

So you’re aiming for about 6.35 oz of nuts. If you hit 6.3 oz, you’re not going to ruin anything. If you hit 5.5 oz because you rounded like a maniac, you’ll notice.

Now shipping version, because it’s the one that bites people:

Scenario: You’re shipping a small part and the label rate you want is up to 12 oz. Your packed box weighs 355 g.

1. Convert the limit to grams: 12 oz × 28.3495 = 340.2 g.
2. Compare: your package is 355 g, which is over 340.2 g.
3. So you’re over the 12 oz line. Either lighten it, or accept the next tier.

That’s a lot clearer than converting 355 g to ounces and then arguing with yourself about decimals. And yes, I’ve done that argument in my head at the counter. More than once!

FAQ (the stuff people ask me every time)

Is 28 grams exactly 1 ounce?

Nope. 1 ounce is exactly 28.3495 grams (rounded). Using 28 g = 1 oz is a quick estimate, not a precise conversion.

Why do some charts say 454 g is a pound?

Because it’s basically true for everyday use. A pound is 16 ounces, and 16 × 28.3495 = 453.592 grams. People round it to 454 g because nobody wants to say “453.592” out loud.

For shipping, should I round up or down?

If you’re near a cutoff, don’t “round” at all—use the actual scale reading and convert the limit to grams.

• Trying to stay under 8 oz? Target 226.8 g or less.
• Trying to stay under 12 oz? Target 340.2 g or less.