Free tool
Press brake tonnage calculator
Find out how many tonnes of press brake your part needs: choose the metal, enter the thickness and bending length, and get the required force and the suggested machine size.
Calculator
Approximate force required
74.5 tonnes
731.3 kN
- Suggested machine (with 20% margin)
- 89.4 tonnes or more
- Force per metre
- 243.8 kN
- Die opening
- 24 mm
- Minimum flange length
- about 16.8 mm
- Inner radius
- about 3.8 mm
An air bending estimate using the common workshop rule. The actual force depends on the metal, the tooling and the bending method, so send us your part and we will calculate it precisely.
Send the result and ask for a machine recommendationFor the full explanation of force, bending length and drive type, read how to choose a press brake, and see the available types in CNC press brakes.
FAQ
Questions about bending force
The common air bending rule for mild steel: force per metre in kN ≈ 650 × thickness² ÷ die opening, then multiplied by the bending length in metres. Stainless needs about 1.5 times as much, and aluminium about half.
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