Torque Calculator

Jakob Wankel

About this app

Calculate the maximum torque and load for different types of bolts:

BA
BSF
BSW
Metric Coarse
UNC BS970
UNF BS970
UNC ASTM
UNF ASTM
Mach. Screw

The calculated values are the maximum recommended values, based on 90% of yield.

If your bolt is not listed, enter the values of your bolt by hand.

For more information about the equations used to calculate the torque, check out http://torquecalculator.jwankel.envire.de

Ratings and reviews

first I thought it's just got imperial threads and was ready to uninstall it but then I found I was wrong... simple and effective app. please add some more metric standards and some presets for the friction coefficient that may help people who don't have idea of its value like I do.

I installed this app, believing the title, that it was a bolt torque calculator. It is not. It doesn't calculate the torque using the accepted engineering formula. Instead, it uses a database for answers based on your selections. That would be useful for most applications, but when you ask the app about a 7mm x 1.25 bolt, it throws an error, saying that is not a standard bolt size. And a 10mm x 1.0 is also not. These are fasteners that have been used in European cars for DECADES. Do the math.

Only designed for max torque to shear the bolt. It doesn't take into account parent material. If I have an m12 8.8 bolt threading into 8mm think aluminium how many Nm do I use? This app can't say