Bending Force & Tonnage Calculator is a practical engineering tool designed to help metal fabrication professionals accurately calculate the required bending force and tonnage for press brake operations. By inputting material type, thickness, bending length, and die opening, this calculator quickly provides reliable tonnage estimates to prevent machine overload, tooling damage, and bending inaccuracies. Using a Bending Force & Tonnage Calculator allows operators, engineers, and production planners to select the correct press brake capacity, optimize tooling setups, and improve bending safety and efficiency. It is an essential reference for workshop planning, machine selection, and daily bending process optimization.

Bending Force & Tonnage Calculator

Calculator

P = (C × S² × L × σb) / V

P

Bending Force

Output in Tons

C

Constant

1.42 for air bending

S

Material Thickness

Input in mm

L

Bending Length

Input in mm

σb

Tensile Strength

MPa (N/mm²)

V

V-Die Opening

Input in mm

Input Parameters

Metric Imperial

Recommended: V ≥ 8 × S = 24 mm

Calculation Results

Required Tonnage

0.00 Tons

Metric Tons

Force in kN

0.00 kN

Kilo-Newtons

Force per meter

0.00 T/m

Material

Mild Steel

V/S Ratio

8.0

Recommended Press Capacity

Calculated Force 0.00 T
With 20% Safety Factor 0.00 T

Always select a press brake with capacity exceeding the calculated tonnage plus safety margin.

Standard V-Die Selection (8S Rule)

S = 1mm V = 8mm
S = 2mm V = 16mm
S = 3mm V = 24mm
S = 4mm V = 32mm
S = 6mm V = 48mm
S = 10mm V = 80mm