Compression Foam / Gasket Seal Calculator

Calculate compression force, contact pressure, and compression set for foam gaskets and elastomeric seals

Material

Gasket Geometry

mm²

Compression Force Deflection (CFD) Properties

kPa
kPa
Design looks good
Optimal
33.33
Compression (%)?
9.17
Required Force (N)?
36.67
Contact Pressure (kPa)?
Cross-SectionUrethane33.3%t₀ = 3.0t₁ = 2.0

Force vs. Deflection %

This curve shows how much clamping force (N) your gasket produces at each compression level. The blue dot is your current operating point. The green zone (25–50%) is optimal — enough deflection for a reliable seal without over-stressing the foam. Beyond 50% (red zone) force rises steeply but so does permanent deformation. Use the tolerance band to see how manufacturing variation in the gap affects force.

Compare:
C = 33.33%F = 9.17 Np = 36.67 kPa
Sensitivity: 0.50 N/%(Moderate)
For every 1% change in compression, force changes by ~0.50 N/%.Moderate sensitivity — output responds moderately to input changes.
±mm→ 5.83–12.50 N
Optimal 25–50%Set risk >50%±0.2 mm tolerance

Created by Catlynn Nguyen & Jie Chai · 2026