Torque calculator
Welcome! This app calculates torque values for bolt tightening. It also lets you save calculations on your device.
Choose calculation method
The standard setting can be changed at any time inside the app.
The Kellerman&Klein calculation is using average values of the friction coefficients. VDI 2230 is using the minimum friction coefficient and is calculating a torque corresponding to a clamp load utilizing 90% of the yield point of the bolt.