Converter
Ounces to Grams Converter
Type a value in ounces and get the grams answer instantly — with the formula and a reference table right below.
Grams = Ounces × 28.3495
Ounces to Grams Converter guide
What does this converter do?
This page converts ounces (oz) to grams (g) instantly as you type. It is one focused pair from the full Weight converter, which handles every supported weight unit in both directions.
How is the conversion calculated?
Grams = Ounces × 28.3495. Multiply the ounces value by 28.3495. The factor is fixed, so the math is deterministic and repeatable.
When oz to g comes up
You are cooking from an American recipe on a metric kitchen scale, reading a US supplement, coffee, or pet-food label that gives serving sizes in ounces, converting a metric shipping weight for a carrier that quotes ounces, or checking the weight of a US-made product against a European spec sheet. Note this is the weight ounce; fluid ounces for liquids are a volume and convert differently.
Quick mental rule
Multiply ounces by 28 and add a pinch: 8 oz × 28 = 224 g against the exact 226.8 g. Using 28 understates by about 1.2%; using 30 is easier but overstates by 5.8%, enough to throw off a cake. For pounds, remember 16 oz is 454 g.
Worked example
Worked example: 100 oz converts to 2,834.95 g. Change the input above to convert your own value.
Common values
The reference table lists frequently searched amounts such as 1, 10, and 100 oz. Amounts are shown rounded for readability; the live result keeps full precision.
Common questions
Frequently asked questions
How many grams are in an ounce?
One avoirdupois ounce is exactly 28.349523125 g, normally rounded to 28.35 g.
How many grams is 4 ounces?
4 oz × 28.349523125 = 113.398 g — the weight of a standard quarter-pound stick of butter.
How many grams is 8 oz?
8 oz is 226.796 g, so a half-pound is about 227 g.
How many grams is 16 ounces?
16 oz is one pound, or 453.592 g — usually written as 454 g on packaging.