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Convert Ounces to Grams

Convert weight and mass units instantly: milligrams, grams, kilograms, tonnes, ounces, pounds and stone.

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    Result

    This page opens the weight converter preset to ounces → grams. One avoirdupois ounce is exactly 28.349523125 grams (a sixteenth of the 453.59237 g pound), so grams = ounces × 28.349523125 with no approximation.

    Useful values: 1 oz is 28.35 g, 4 oz is 113.4 g (the classic quarter-pound), 8 oz is 226.8 g, and 16 oz — one pound — is 453.6 g. An American 12 oz bag of coffee holds 340 g. Note this is weight ounces, not fluid ounces, which measure volume.

    Use it to follow US recipes on a metric kitchen scale, decode product sizes from American shops and convert nutrition portions. Enter ounces and read grams instantly — or start from grams and let the converter work backwards.

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    Accepted Formats & Rules

    • Seven units: mg, g, kg, tonnes, ounces, pounds, stone.
    • Two-way live fields with instant unit swap.
    • Common-values table tuned to the selected units (body weight, cooking amounts).

    Key Benefits

    ✓ Exact international avoirdupois factors (1 lb = 0.45359237 kg by definition) — no rounded rules of thumb.
    ✓ Live two-way conversion: type in either field and the other updates instantly, with one-click unit swap.
    ✓ Runs entirely in your browser, offline-capable — nothing you weigh or convert leaves your device.

    Use Cases

    • • Convert body weight between kilograms, pounds and stone for foreign forms and fitness apps.
    • • Follow American recipes by turning ounces into grams on a metric kitchen scale.
    • • Check airline baggage allowances and parcel weights across metric and imperial units.