How many ounces are in a gram?

One gram is about 0.03527 oz. That is 1 divided by 28.349523125, the avoirdupois ounce in grams.

How many ounces is 100 g?

100 g is about 3.527 oz. Divide grams by 28.35 for a quick estimate.

A recipe lists 250 g of flour. How many ounces is that?

250 g is about 8.82 oz. That is over half a pound.

31.1 g is about 1.097 oz here, because this converter uses the avoirdupois ounce of 28.349523125 g. The troy ounce is a separate unit of 31.1034768 g.

Grams to Ounces Converter

Enter a value to instantly convert between weight units.

From

Precision4 dp

1 Gram = 0.0353 Ounce

Key Formulas

Kilogram → Pound

lb = kg × 2.20462

Pound → Kilogram

kg = lb × 0.453592

Gram → Ounce

oz = g × 0.035274

Ounce → Gram

g = oz × 28.3495

Formula

oz = g × (0.001 / 0.028349523125)

One gram is about 0.035274 ounces, so multiply grams by 0.035274. Recipes, postal scales, and nutrition labels switch between grams and ounces, and a 100 g portion is about 3.53 oz. NIST Handbook 44 lists 16 avoirdupois ounces per pound, and with the pound at 0.45359237 kg per NIST footnote 22, one ounce is 28.349523125 g. Grams follow the BIPM prefixes. Troy ounces, used for precious metals, are a different unit that this converter leaves out.

Source: NIST exact and named mass definitions (definition-derived arithmetic)

Reviewed by the Convert Calc editorial team · Last reviewed: 2026-10-06 · see our methodology

Frequently Asked Questions

Real-World Examples

A 28.35 g portion on a food label.

28.35 g = 1.000016821 oz

A 5 g sachet of sweetener.

5 g = 0.1763698097 oz

A 31.1 g coin, near one troy ounce in mass.

31.1 g = 1.097020217 oz

A 100 g chocolate bar on a US label.

100 g = 3.527396195 oz

kg to lbs lbs to kg ounces to grams kg to grams stone to kg lbs to ounces ounces to lbs stone to lbs

See This in Context

Cooking Science & Lab Baking Ingredient Weight Chart: Cups to Grams