Ounces to Grams Converter

Ounces to grams: the quick answer and the formula

To convert ounces to grams, multiply the number of ounces by 28.3495. So 4 ounces is about 113.40 grams, 8 ounces is roughly 226.80 grams, and 12 ounces equals 340.19 grams. One avoirdupois ounce is defined as exactly 28.349523125 grams, which makes this a reliable bridge between the imperial weight system and the metric one. This ounces to grams converter does the multiplication instantly in your browser, with no signup, so you can type a weight and read the result in grams right away.

Because the relationship is fixed, you can trust the answer for cooking, postage, nutrition labels, and lab work. If you need the opposite calculation, the reverse-direction grams to ounces converter divides by 28.3495 instead, which is what you want for queries like 100 grams to ounces or 10 grams to ounces.

How to use this ounces to grams converter

The tool is designed to be faster than reaching for a kitchen scale's manual.

1. Enter your weight in the ounces field. Decimals work, so 1.5 oz or 3.25 oz are both fine.
2. Read the grams value as it appears. The × 28.3495 step is already applied.
3. Copy the result, or keep typing new values to convert a recipe's worth of measurements in turn.

This online converter from ounces to grams works for single weights and quick comparisons alike. It is the same idea whether you call it an ounces to grams calculator, an ounces to grams converter, or a measurement converter for weight.

Ounces to grams formula and worked examples

The conversion uses one factor:

grams = ounces × 28.3495

The reverse direction divides instead:

ounces = grams ÷ 28.3495

To work an example by hand, take 4 ounces: 4 × 28.3495 = 113.40 grams. For 14 ounces: 14 × 28.3495 = 396.89 grams. The table below covers the weights people convert most often, so it doubles as an ounces to grams chart converter you can rely on even when you are away from the tool.

Common conversions and use cases

Switching between ounces and grams comes up constantly when imperial recipes and metric scales meet.

• Cooking and baking. American recipes list dry ingredients in ounces, while most kitchen scales elsewhere read in grams. Baking especially rewards the precision of grams.
• Nutrition labels. Serving sizes appear in both units depending on the country, so converting helps you compare products fairly.
• Postage and shipping. Letter and parcel rates are often banded by weight, and carriers may quote thresholds in either unit.
• Coffee and tea. Hobbyists weigh beans and leaves in grams for repeatability, even when bags are sold by the ounce.

Mixed imperial weights are common too, so it helps to know how pounds and ounces combine before converting. To turn pounds and ounces to grams, convert the pounds (1 lb = 453.59 g), convert the ounces, then add the two. For example, 2 lb 6 oz = 907.18 g + 170.10 g = 1,077.28 g. The table below lists the popular grams-to-ounces figures people look up most, useful for going from grams to ounces to pounds.

The same factor works for any weight. A 6 oz steak is about 170 g; a 3.5 oz bar of soap is roughly 99 g; and a 250 g pack of pasta is around 8.8 oz. Once multiplying by 28.35 becomes second nature, you can estimate quickly and keep the tables for when precision counts.

Ounces, grams, and troy ounces in context

The two everyday units belong to different families. The gram is metric, where 1,000 grams make a kilogram. The avoirdupois ounce is part of the imperial and US customary systems, where 16 ounces make a pound. Because the systems are not decimal cousins, converting between them always uses that 28.3495 bridge.

One important wrinkle: not every ounce is the same. The ounce used for food, postage, and most goods is the avoirdupois ounce of 28.3495 g. Precious metals like gold and silver are weighed in troy ounces, which are heavier at 31.1035 g each. So a query for grams to troy ounces uses a different factor: divide grams by 31.1035, not 28.3495. A grams to troy ounces calculator is the right tool for bullion, while this page handles the everyday avoirdupois ounce.

The avoirdupois ounce has been exactly 28.349523125 grams since the 1959 international yard and pound agreement, which tied imperial weights to the metric kilogram. That precision is why an ounces to grams result is dependable to several decimal places, whether you are portioning ingredients or weighing a parcel.

It is also worth remembering why both systems endure. The United States still uses ounces and pounds in daily life, while almost everywhere else weighs in grams and kilograms. Cooks, shippers, and scientists who work across borders meet both constantly, and a quick ounces to grams converter removes the friction at the boundary. You only need the one factor, 28.3495, and the discipline to apply it in the correct direction.

Grams are especially valued in baking because they remove the ambiguity of volume measures. A cup of flour can weigh anywhere from 120 to 150 grams depending on how tightly it is packed, while 4 ounces of flour is always 113 grams. That is why professional recipes and competitive bakers weigh ingredients rather than scooping them. If you are working from a recipe that lists ounces but you only have a metric scale, converting once at the start saves you from rounding errors that compound across several ingredients. Keep the gram values to one decimal place while you work, and round only the final quantities you actually weigh out.

Common mistakes to avoid

The math is simple, but a few habits cause errors.

• Dividing instead of multiplying. Going from ounces to grams multiplies by 28.3495. Dividing gives grams to ounces, the opposite direction.
• Using 28 instead of 28.3495. Rounding the factor introduces error that adds up over larger weights. Use the full value when accuracy matters.
• Confusing fluid ounces with weight ounces. A fluid ounce measures volume, not mass. For liquids, use the fluid ounces to milliliters converter instead of this weight tool.
• Mixing up avoirdupois and troy ounces. Precious metals use 31.1035 g per ounce. Do not apply 28.3495 to gold or silver.
• Forgetting to add pounds. When converting pounds and ounces to grams, convert both parts and sum them; do not drop the pounds.

Tips and related converters

A useful shortcut: multiplying by 28.3495 is close to "ounces times 28," so 4 oz is roughly 112 g against the exact 113.40 g. For liquids rather than solids, the fluid ounces to milliliters converter and the milliliters to fluid ounces converter handle volume. When you need pounds, the ounces to pounds converter divides by 16. Browse every weight and measurement tool on the unit converters hub, and use the grams to ounces converter whenever you need to go back the other way.

Frequently asked questions

How do I convert ounces to grams? Multiply the ounce value by 28.3495. For example, 4 oz × 28.3495 = 113.40 grams. Because one ounce is exactly 28.349523125 g, the result is precise.

How many grams is 8 ounces? 8 ounces equals 226.80 grams, which is half a pound. You get this by multiplying 8 by 28.3495.

What is 100 grams to ounces? 100 grams is about 3.53 ounces. Going from grams to ounces divides by 28.3495, the opposite of the ounces-to-grams direction.

How many grams is 4 ounces? 4 ounces equals 113.40 grams, a quarter of a pound. This is one of the most common conversions in American recipes.

What is the exact ounces to grams factor? One avoirdupois ounce is defined as exactly 28.349523125 grams, so converting ounces to grams means multiplying by 28.3495 for everyday use. Avoid rounding to 28.

How do I convert grams to troy ounces? Divide grams by 31.1035, not 28.3495. Troy ounces are used for precious metals and are heavier than the ordinary avoirdupois ounce, so a grams to troy ounces calculator uses the larger factor.

How do I convert pounds and ounces to grams? Convert the pounds (1 lb = 453.59 g) and the ounces (1 oz = 28.3495 g) separately, then add them. For example, 1 lb 8 oz = 453.59 + 226.80 = 680.39 g.

Are fluid ounces the same as weight ounces? No. Fluid ounces measure volume, not mass, so this tool does not apply to liquids. Use a fluid ounces to milliliters converter for liquid measurements.

How do I convert grams back to ounces? Divide the grams by 28.3495. Our grams to ounces converter does this automatically, so 50 g becomes 1.76 oz.