O-ring calculator
Calculate O-ring squeeze, stretch and gland fill.
MATHElastomer chemical compatibility
Compare common media with NBR, FKM, EPDM, HNBR, CR and silicone.
A LITTLE MORE CLARITY
Candidate materials
EPDM, CR, VMQ
Example result · Adjust the inputs to make it yours
Declared temperature23
Result1
Indicative. Confirm formulation, concentration, temperature and pressure with a data sheet or test.
All the details
6 rows| Elastomer | Guidance |
|---|---|
| NBR | Limitado |
| FKM | Limitado |
| EPDM | Recomendable |
| HNBR | Limitado |
| CR | Recomendable |
| VMQ | Recomendable |
UNDERSTAND THE HOW
More than a result. An explanation.
Shows a reference matrix to shortlist material candidates and flags when a data sheet or test is needed.
compatibility = medium family x elastomer; temperature changes the confidenceAssumptions and limitations
Indicative only: actual formulation, concentration, pressure, cycles and temperature can change the result. It is not an approval for use.
A simple example
For mineral oil, NBR and FKM are common starting candidates; always confirm formulation and temperature.
Are my inputs stored?
No. Processing stays in your browser. Only tool IDs and timestamps are kept in your recent history; password generation is excluded.
Formula visible · Updated September 8, 2026