Convert Grams to Ounces

Grams to ounces for cooking, post and shopping

Type a weight in grams and get it in ounces immediately, along with pounds, kilograms, milligrams and other mass units. For weights of a pound or more the converter also gives a pounds-and-ounces line, the way US recipes and baby weights are written. The swap button turns it into an ounces-to-grams converter.

One avoirdupois ounce is exactly 28.349523125 grams, so 1 g = 0.035274 oz.

The formula

ounces = grams ÷ 28.3495

ounces = grams × 0.035274

grams = ounces × 28.3495

For pounds and ounces: divide the ounces by 16 – the whole number is pounds and the remainder is ounces. 500 g = 17.64 oz = 1 lb 1.6 oz.

Worked examples

• 100 g = 3.53 oz.
• 250 g pack of butter = 8.82 oz (US sticks are 4 oz / 113 g).
• 500 g of pasta = 17.64 oz = 1 lb 1.6 oz.
• 30 g serving of cereal = 1.06 oz.
• 1 kg of flour = 35.27 oz = 2 lb 3.3 oz.
• A 28 g letter = just under 1 oz.
• A 1 oz gold coin is a troy ounce = 31.10 g (see below).

Grams to ounces chart

Ounces to grams chart

Ounces vs fluid ounces

An ounce (oz) measures weight; a fluid ounce (fl oz) measures volume. They match only for water and similar liquids – 1 US fl oz of water weighs about 1.04 oz (29.6 g). A cup of flour weighs around 120–130 g (4.2–4.6 oz), while a cup of sugar weighs about 200 g (7 oz). For baking, weighing in grams is more accurate than using cups. If a recipe gives fluid ounces, use the unit converter volume category instead.

Troy ounces for gold and silver

Precious metals are priced per troy ounce, which is 31.1034768 g – about 10% heavier than the ordinary (avoirdupois) ounce of 28.35 g. A 1 kg gold bar is 32.15 troy ounces but 35.27 ordinary ounces. In India, gold is also weighed in tola (11.66 g) and grams; the weight converter includes tola. When comparing gold prices, always check which ounce is meant.

Common kitchen amounts

Cup weights vary with how the ingredient is packed, so treat these as typical values.

Quick mental estimate

Divide grams by 30 for a rough ounce figure: 300 g ≈ 10 oz (exact 10.58 oz). For the reverse, ounces × 30 ≈ grams, then subtract 5%: 8 oz × 30 = 240, minus 12 = 228 g (exact 226.8 g).

Where the ounce comes from

The ounce derives from the Roman uncia, one twelfth of a Roman pound – the same word that gives us 'inch'. The avoirdupois system, with 16 ounces to the pound, was adopted for general goods in England in the 14th century, while the troy system was kept for precious metals and medicines. The international avoirdupois ounce has been exactly 28.349523125 g since 1959.

Postage and parcels

Postal services in the US price letters by the ounce (a standard letter stamp covers up to 1 oz, 28.35 g), while most other postal services use grams (for example 0–100 g bands). A typical sheet of A4 or Letter paper weighs about 5 g, so a letter with four sheets and an envelope is around 25–30 g – right on the 1 oz limit. Weigh before posting, and round up when the scale shows a value close to a band boundary.

Grams to ounces for coffee and tea

Specialty coffee recipes often call for 15–18 g of coffee per 250 ml cup (about 0.5–0.6 oz). A standard espresso uses 18 g (0.63 oz) of ground coffee for a double shot. Loose-leaf tea is typically 2–3 g (about 0.1 oz) per cup.

Privacy

The converter runs entirely in your browser. Nothing you type is sent to a server, your values are not tracked, and once the page has loaded it keeps working offline – useful in a workshop, a kitchen, a gym or on a plane.

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