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Tonnage Calculator

Tonnage Calculator

Calculate the tonnage required for your punching application

Tonnage: Use the following formula to calculate the tonnage required to punch a round hole in mild steel:

Punch diameter x Material Thickness x 80 = Tons of pressure required

Example: to punch a 1/2" hole through 1/4" thick mild steel

0.500 x 0.250 x 80 = 10 tons required

Use the following formula to calculate the approximate tonnage required to punch a shaped hole in mild steel:

1/3 Perimeter of punch x Material Thickness x 80 = Tons of pressure required

Example: to punch a 9/16" x 1" hole through 1/2" thick mild steel

  • Find perimeter: 0.5625 + 0.5625 + 1.000 + 1.000 = 3.125
  • Find 1/3 perimeter: 0.33 x 3.125 = 1.031
  • 1.031 x 0.500 x 80 = 41 tons of pressure required

NOTE: The thickness of the material should not exceed the punch diameter.

Need help calculating tonnage required?
  • Please select material type.
  • Please input valid thickness.
  • Select the shape of the hole you are punching
      • Please select punch size.
      • Please select punch size.
      • Please select punch size.
      • Please select punch length.
      • Please select punch size.
      • Please select punch size.
      • Please select punch length.
Minimum tonnage required to punch hole 0 Ton