Ounces to Grams

Convert ounces to grams instantly, with a full reference table.

Ounces to Grams conversion table
Ounces (oz)Grams (g)
128.3
256.7
385
4113.4
5141.7
6170.1
7198.4
8226.8
9255.1
10283.5
11311.8
12340.2
13368.5
14396.9
15425.2
16453.6
Formula: One ounce equals 28.3495 grams. To convert ounces to grams, multiply by 28.3495.

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About the Ounces to Grams

Ounces to Grams converts a weight in ounces (oz) into grams (g) using the exact relationship of one international avoirdupois ounce to 28.349523125 grams, usually rounded to 28.3495 g for everyday work. You type a number of ounces, and the tool multiplies it by that factor to return the grams value instantly. It is built for the everyday moment when a recipe, package label, shipping form, or product spec lists ounces but the scale, lab sheet, or other ingredient you are working from is measured in grams. No mental math, no rounding errors, just a clean number you can act on.

Reach for this converter whenever you are following an American recipe with a metric kitchen scale, reading a US food label while cooking abroad, or weighing out portions for nutrition tracking that logs everything in grams. Crafters and small sellers use it to convert wax, soap, resin, coffee, or spice quantities; hobbyists use it for reloading, fishing weights, and 3D-printing filament. Because grams divide more finely than fractional ounces, switching to grams gives tighter control: in baking, a five-gram swing can decide whether cookies turn out chewy or crisp, so precise conversion genuinely changes results.

The math is a single multiplication. Grams equal ounces times 28.3495, so 4 oz becomes about 113 g, 8 oz becomes about 227 g, and 16 oz (one pound) becomes roughly 454 g. The tool keeps several decimal places internally and shows a sensibly rounded answer, so you get accuracy without a string of meaningless digits. Enter whole numbers or decimals such as 2.5 oz; the converter handles both. To go the other direction, divide grams by 28.3495 (or use the matching Grams to Ounces tool).

One important distinction: this tool converts the standard avoirdupois ounce used for food and everyday goods, not the troy ounce used for gold and silver, which equals about 31.1035 g and is roughly ten percent heavier. It also converts weight ounces, not fluid ounces, which measure volume. Everything runs entirely in your browser, so the numbers you enter never leave your device, are not stored, and are not sent to any server. That makes it safe for sensitive figures and fast even on a slow or offline connection.

Frequently asked questions

How many grams are in one ounce?

One standard (avoirdupois) ounce equals 28.349523125 grams, almost always rounded to 28.3495 g or 28.35 g. To convert any number of ounces, multiply it by this factor.

What is the formula to convert ounces to grams?

Grams = ounces x 28.3495. For example, 6 oz x 28.3495 = about 170.1 g. To reverse it, divide grams by 28.3495 to get ounces.

Is an ounce the same as a fluid ounce?

No. An ounce (oz) measures weight, while a fluid ounce (fl oz) measures volume. This tool converts weight ounces to grams, so do not use it for liquid volumes like milk or water without first knowing the liquid's density.

Why does my gold or silver ounce convert to about 31 grams instead of 28?

Precious metals are weighed in troy ounces, which equal roughly 31.1035 g and are about 10 percent heavier than the everyday avoirdupois ounce. This converter uses the standard ounce, so it is not the right tool for bullion.

What are the most common ounce-to-gram conversions for cooking?

4 oz is about 113 g (one stick of butter), 8 oz is about 227 g (two sticks of butter or a block of cream cheese), and 16 oz is about 454 g (one pound, common for bulk flour or sugar).

From our blog

Centimeters to Feet: The Quick Method, the Inch Trap, and a Cheat Sheet

By the Super Simple Digital Tools Team · Updated June 2026

Most centimeter-to-feet conversions exist for one reason: someone wrote a measurement in metric and someone else needs it in imperial. Heights on medical records, product dimensions on international listings, and measurements in foreign instructions all arrive in centimeters, while feet and inches remain the everyday language for height and room sizes across the United States and United Kingdom. The good news is that the conversion is built on a single exact number, so once you know it, you never have to guess.

That number is 30.48: one foot is defined as exactly 30.48 centimeters. To get decimal feet, divide your centimeter figure by 30.48. So 200 cm divided by 30.48 is about 6.56 feet. Decimal feet are mathematically correct but awkward to picture, which is why the second step matters. Take the part after the decimal point, multiply it by 12, and you have the inches. For 200 cm, the 0.56 becomes about 6.7 inches, giving roughly 6 feet 7 inches, the kind of figure you would actually say out loud.

The single biggest error people make is confusing decimal feet with feet and inches. A height of 5 feet 11 inches is not 5.11 feet. The .11 in 5.11 feet is eleven hundredths of a foot, which is only about 1.3 inches, so 5.11 feet is about 156 cm. Genuine 5 feet 11 inches is about 180 cm, a difference of nearly two and a half centimeters. Whenever a form has a single decimal feet box, do the inch math separately, or use a converter that gives you feet and inches directly.

A few anchor values make mental estimates easy. 152.4 cm is exactly 5 feet. 160 cm is about 5 feet 3 inches, 165 cm is about 5 feet 5 inches, 170 cm is about 5 feet 7 inches, 175 cm is about 5 feet 9 inches, and 180 cm is about 5 feet 11 inches. Notice that each additional 2.5 cm adds roughly an inch. Memorizing just the 5-foot and 6-foot marks lets you sanity-check almost any height conversion in your head before trusting a screen.

If you need precision rather than a rough idea, hold on to the unrounded result. Because the conversion factor is exact, the only error in a digital tool comes from how many decimal places it displays. For documents like engineering drawings, shipping specs, or official forms, copy the full-precision value and round only at the very end. For casual use, feet and inches rounded to the nearest inch is almost always what people expect to see.

  • Divide by 30.48 for decimal feet, then multiply only the leftover decimal by 12 to get inches.
  • Never type a height like 5'11" as 5.11 in a decimal feet box; that equals about 156 cm, not 180 cm.
  • Memorize 152.4 cm = 5 feet exactly and add roughly one inch per 2.5 cm to estimate any height fast.
  • For official paperwork, keep the unrounded figure and round only at the final step to avoid stacking errors.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.

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