Soil Texture Calculator

Enter your soil's sand, silt, and clay percentages. The calculator normalizes to 100% and estimates the USDA textural class (e.g., Loam, Sandy Clay Loam). For best results, use a particle-size analysis from a lab.

Results

Results include: Normalized Sand/Silt/Clay (%) and USDA textural class with a plain‑language note.

Normalized Sand (%)

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Normalized Silt (%)

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Normalized Clay (%)

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USDA Class

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Useful Tips

Must total ~100%: If your inputs don’t sum to 100, we normalize the proportions for classification.
Field tests are rough: Ribbon and jar tests are helpful but less precise than lab analysis.
Texture isn’t fertility: Texture affects water/air, not nutrients directly—pair with soil tests.
Amendments: Improving structure (organic matter, cover) often matters more than changing texture.