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Calcimator

Clamp Force Calculator

Calculate required clamping tonnage from projected part area, cavity pressure, and number of cavities.

Inputs

in²
psi

Results

Required Clamp Force

132 US tons

Clamp Force1,174.3 kN
Clamp Force119.8 metric tons
Total Projected Area48 in²
Force per Cavity33 tons
Recommended Machine Size150 tons
How to Use This Calculator
  1. Enter projected part area per cavity (in²) — measure on the parting line plane in your CAD model.
  2. Set cavity pressure (PSI) based on material and part geometry — typically 5,000–15,000 PSI.
  3. Enter number of cavities in the mold.
  4. Review required clamp force (tons and kN) and confirm your press has sufficient clamping tonnage.
  5. Add 10–15% safety margin above the calculated requirement when selecting the press.
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