Ounces to Grams Converter
Convert ounces to grams and grams back to ounces for cooking and baking.
Formula and sources updated · Data sources · 1View algorithm, constants and default inputs (JSON)
1 g ≈ 0.0352739619 oz
About this calculator
This page converts avoirdupois weight ounces to grams and back; it does not convert fluid ounces. One avoirdupois ounce is exactly 28.349523125 g. For baking, weighing in grams avoids ingredient-density differences in volume measures.
Worked example
calculated with the default values below
Weight 8 · Direction ⇄ · Decimal places 4 · From Ounces (oz) · To Grams (g) Result 226.7962 · Kilograms 0.2268 kg · Pounds 0.5000 lb
Method and assumptions
Formula basis and scope
1 avoirdupois ounce = 28.349523125 g.
Only the displayed unit definitions are converted; rounding and measurement uncertainty are separate.
Data sources
Disclaimer
These calculators give general conversion results. Rounding and the precision of the value you enter both affect the output, so treat displayed decimals as indicative rather than exact.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
g = oz × 28.349523125; oz = g ÷ 28.349523125
- oz
- ounces (avoirdupois)
- g
- grams
Converts avoirdupois mass ounces to grams (1 oz = 28.349523125 g), not fluid ounces; volume-to-mass conversion requires ingredient density.
Frequently asked questions
Does oz mean fluid ounces here?
No. This calculator converts ounces of mass (avoirdupois) to grams: 1 oz = 28.349523125 g. Fluid ounces measure volume and cannot be converted to grams without knowing the ingredient density.
Why is one ounce not exactly twenty-eight grams?
The calculator uses the precise factor 28.349523125 grams per ounce, so an 8-ounce portion is 226.8 grams rather than a flat 224. The small 0.3495 difference per ounce is invisible in a single scoop but compounds: a pound is 453.592 grams, not 448, and a ten-ounce recipe drifts by nearly 3.5 grams from the rounded figure. Bakers care because flour measured this way shifts the hydration of a dough.