Category
Seeds
Seeds vary by size, grind, and moisture; chia and flax absorb water. Pick the exact form.
Source: USDA FDC - seed search
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.
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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