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Morse - O - Tool

Concave Oval Compression Force Calculator

Instant tablet area, shape factor, and compression force (kN & U.S. tons)

This Concave Oval Tablet Calculator helps pharmaceutical engineers instantly calculate tablet area, shape factor, and compression force to support accurate press setup and tooling design.

Minor axis (short side) of oval tablet.
Major axis (long side) of oval tablet.
Concavity depth of the punch face.
Auto calculates pressure based on Shape Factor lookup table.

Shape Factor to Allowable Pressure Table

Shape Factor (S/F)Allowable Pressure (kN/mm²)Concavity Level
0.000 - 0.0502.172 - 1.460Flat to Shallow
0.050 - 0.1001.460 - 0.893Shallow to Standard
0.100 - 0.2000.893 - 0.334Standard to Deep
0.200 - 0.3500.334 - 0.077Deep to Very Deep

Higher shape factors (deeper concavity) require lower pressures to prevent tooling damage.

Auto pressure is calculated based on Shape Factor lookup table. Always validate with your internal SOPs and press vendor limits.

Disclaimer: Results are approximate, we assume no liability for their accuracy

FAQ

How is oval tablet area calculated?

Plan area A = 0.785 × W × L, where W is width (minor axis) and L is length (major axis). This approximates the tablet as an ellipse.

How is pressure automatically calculated?

Pressure is determined using a Shape Factor (S/F) lookup table. Higher shape factors (deeper concavity) require lower pressures to prevent tooling damage and ensure proper tablet formation.

What is the shape factor?

Shape Factor (S/F) = D ÷ W, where D is cup depth and W is width. It's a quick indicator of concavity relative to width.

Which units does the calculator output?

Force is shown in kN and converted to U.S. short tons (1 kN ≈ 0.112404 short tons).

What's the difference between S7 and O1/D2 steel?

S7 steel offers 100% force capacity with high toughness. O1/D2 steels provide 90% of S7 capacity but offer different wear characteristics and may be more cost-effective.