Converter
particle-size classification
Wentworth grain-size classes
reference-only
- Record
- M662
- Definition quality
- Historically documented
- Conversion mode
- reference only
- Calculator
- Reference table only
Classification boundaries are conventional definitions, not claims that nature changes abruptly at exactly 2 mm or 62.5 µm.
Definition
Wentworth classes use gravel ≥2 mm, sand <2 mm to ≥62.5 µm, silt <62.5 µm to ≥4 µm, clay <4 µm.
Modern use
Modern use is context-dependent and varies by region or measurement system.