We created the USCS Calculator for those of you that classify soil according to the ASTM Visual-Manual Procedure (ASTM-D2488) and record only the percentage of gravel, sand, and fines in the field, without the soil group name and symbol. The USCS Calculator allows you to determine the soil group name and symbol from your field data, for use in soil descriptions when preparing boring and test pit logs. Students and young professionals are welcome to use the USCS Calculator for learning the first part of this soil classification procedure online. The USCS Calculator is the core of our Pro Soil Logging Functionality.
USCS Calculator - Quick Start Instructions:
USCS Calculator - Learn the ASTM Visual-Manual Procedure:
The soil is fine grained if it contains 50 % or more fines (Section 13.1). Perform the field tests described in Section 14 and, based on Table 12 (Identification of Inorganic Fine-Grained Soils from Manual Tests), select the appropriate Fines Type button.
The soil is coarse grained if it contains less than 50 % fines (Section 13.2). Based on the percentage of fines, select the appropriate Grading (Fines ≤ 5%), Grading and Fines Type (Fines = 10%), or Fines Type (Fines = 15-45%) button(s).
To use the calculator for another soil sample, press the Clear button.
If you have any comments about the usefulness of this tool or suggestions for improving it, please feel to contact us.