Sheet metal bending calculators.

PG SRL's calculation tools: bending force and sheet metal development — free, real-time and with the formulas explained. Pick the calculator you need.

Four free calculators for sheet metal bending: the tonnage and bending parameters to choose the right press, and the flat development with the K-factor to cut the blank to the exact size, and radius bending (Calendering) for large radii. Declared formulas, real-time recalculation, printable report.

● Calculator

Bending parameters

Required force, recommended V-die, inner radius, minimum flange and springback — from material, thickness, length and angle. With the suggested PG machine and link to the configurator.

Open the calculator → ● Calculator

Sheet metal development & K-factor

Bend allowance, bend deduction, K-factor (DIN 6935) and flat development. Plus a reverse mode: from one bent sample get your real K-factor.

Open the calculator → ● Calculator

Radius bending · Calendering

Large radii without a radius punch: step-by-step bump table, angle, pitch and arc development — the Circle mode of PG's Calendering function.

Open the calculator → ● Calculator

Bending rule

Pick the thickness and read every usable V-die with minimum flange, inner radius and tonnage for carbon and stainless steel. The workshop bending rule, digital.

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WhyTransparent calculations, not black boxes.

Each calculator declares the formula it uses — the same ones from the technical bending literature — and explains how to read the result. They are first-sizing estimates: the final design is closed by our engineering department on your drawing.

We build press brakes and shears: these tools are the first step of the same path we walk with every customer — from the bend to the machine.

The next step

From numbers to machine.

The configurator takes your parameters and turns them into a sized press brake, in 7 steps, with a quote.

Configure your machine →