Thermoforming Draw Ratio Calculator
Calculate areal and linear draw ratios for thermoformed parts. Estimates wall thinning, minimum wall thickness, and forming feasibility.
Inputs
Results
Areal draw ratio
2.62
Min wall thickness (mm)
0.57
Linear draw ratio (H:W)0.5
Avg wall thickness (mm)0.93
Max thinning (%)61.9
Formed surface area (mm²)78,701.6
Opening area (mm²)30,000
Feasibility (1-4)2
Sheet length needed (mm)250
Sheet width needed (mm)200
How to Use This Calculator
- Enter Shape (1=box, 2=cup), Cavity length (mm), and Cavity width / diameter (mm).
- Set Draw depth (mm), Sheet thickness (mm), and Draft angle (°).
- Review Areal draw ratio and Min wall thickness (mm).
- Use Linear draw ratio (H:W) and Avg wall thickness (mm) to inform your decision.
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