Seeds

Seeds vary by size, grind, and moisture; chia and flax absorb water. Pick the exact form.

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Primer

These category tables convert volume to mass using ingredient-specific densities. Use weight for precision; volume varies with packing, cut, and temperature.

Methodology

Density references are summarized from U.S. government sources (USDA FoodData Central, USDA FNDDS) and lab-standard data when available.
Conversions keep higher-precision intermediates and round to practical kitchen values.
Default volume is the US cup unless a page explicitly uses metric or UK standards.

Unit standards

Mass: grams (g).
Volume: mL, US cup, tbsp, tsp.
Assumed temperature: room temperature unless stated otherwise.

Sources (.gov)

Examples and edge cases

Whole vs ground seeds change bulk density (USDA FDC).
Chia and flax absorb water, shifting weight per cup (USDA FDC).
Roasted vs raw seeds differ in moisture (USDA FDC).

Last updated: 2026-01-05

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