Engineering Tool

Durometer / Hardness Chart

Convert between Shore A, Shore D, and IRHD hardness scales. Adjust the slider to see equivalent values and material examples at each hardness.

Hardness Converter

Find your equivalent durometer.

Shore A
Visual scale
Shore A, soft to hard rubber20, 100
Shore D, hard rubber to plastic0, 85

The Shore A/D scales overlap: Shore A 90 ≈ Shore D 40. Use Shore A for soft elastomers, Shore D for hard rubber and plastic.

Disclaimer

This tool is provided as a reference aid to help engineers locate relevant information, it does not replace a formal specification, a Cannon Gasket engineering review, or the manufacturer datasheet for your specific application. Verify all critical values against the primary source before committing to a design. See our Terms of Use for the full disclaimer.

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