Blank Size Calculator

Calculate flat blank diameter for deep drawn cylindrical parts from part dimensions and flange width.

Part Diameter

Part Depth

Corner Radius

Flange Width

Tab to move between fields

Blank Diameter

210.71 mm

Blank with Trim Allowance216.71 mm

Drawing Ratio (D/d)2.11

Number of Draws Needed2

Blank Area36,884.83 mm²

Est. Wall Thinning16.7%

Depth/Diameter Ratio0.75

Part Surface Area31,415.93

How to Use This Calculator

Enter the finished part diameter, draw depth, and corner radius for drawn (cup) parts.
Set flange width if the part has a flange.
Review the calculated blank diameter and blank area.
Use the blank diameter to set up your blanking die and calculate material utilization in the strip.
For complex draws, add 3-5% to blank size and trim after forming -- it's easier to trim than to add material.

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