Free Tool — Tonnage Calculator
Press brake tonnage calculator
This is the tonnage math off the wall chart, in a form you can run standing at the machine. Pick your material, punch in the thickness, bend length, and die opening, and you get the total force and the tons per foot. It’s the standard air-bend formula — no signup, and nothing you enter is saved or sent anywhere.
Air bending tonnage calculator — US tons, inches
Enter a thickness, bend length, and die opening above zero and you’ll get your numbers.
Total force
— tons
Tons per foot
— T/ft
That’s a heavy load per foot — force like this concentrates on a short stretch of tooling, and a number on a chart can’t tell you whether your dies and punches are rated for it. The full version of Precision Form checks tons per foot against your actual tooling before you bend.
How this math works: tons per foot = 575 × thickness² ÷ V-opening, times the material factor, for air bending. The full explanation is in How press brake tonnage is calculated, and the same numbers are laid out as a table in the press brake tonnage chart. Like any chart number, treat the result as the estimate it is and leave your safety factor on top.
Enter your material, thickness, bend length, and the V-opening you’re thinking about. You get the air-bend tonnage for the bend. That’s the number. What it doesn’t tell you is whether the die you picked is the right one out of the rack you actually own — or whether that flange is going to fall into the die. That’s the part Precision Form does: it checks the bend against your own tooling, flags it if the tonnage is over your brake, and saves the setup for the rerun. Free 14-day trial — no credit card required.
A calculator gives you a number. Precision Form checks it against your shop.
The full version picks the die from your actual tooling and ranks the options, checks the tons per foot against your tooling and flags a setup that’s asking too much of it, saves the job so the next run comes out the same, and ties inspection records to each die with QR labels.
Basic $50/mo · Pro Shop $100/mo · Industrial $200/mo. All plans include a 14-day free trial. No credit card required.