Gradalith

Soil gradation and USCS field lab

Purpose-Built

A geotechnical field companion for plotting grain-size distributions, calculating gradation coefficients, and organizing repeatable soil-classification work.

Core Tools

Sieve curve and gradation metrics
USCS-oriented classification workflow
Forty bundled soil-reference plates

Private by Design

No account, ads, tracking, third-party analytics, or developer-operated backend. Your work stays on your device unless you deliberately share or export it.

Use It Responsibly

Classifications are field and study aids, not a stamped geotechnical opinion. Follow project specifications, laboratory procedures, and qualified engineering review.