Manufacturers can also use sheet metal bending calculators and bend deduction calculators to simplify the calculation process. To calculate the bending allowance and bend deduction accurately, manufacturers use specific formulas based on the sheet metals material properties, thickness, and bend angle. The bending allowance is the amount of material added to the flat pattern of the sheet metal to account for the material's elongation and bending angle, while the bend deduction is the amount of material subtracted from the flat pattern to account for the material's compression during bending. Calculating bending allowance and bend deduction is a critical step in the sheet metal bending process, as it ensures that the final product matches the intended design accurately.