Mil-Rad

Scope Mount Cant Offset Calculator

Use this simple calculator to figure out the loss in height from a cant in the scope mount. For example, let's say your scope mount gives you a 10mm height clearance between the bottom of the scope and the top of the barrel. If your scope mount has a 20 MOA cant, what is the impact to your height clearance? Find out with this calculator.

Scope cant
MOA

Scope-to-rail front distance

Offset: tan(MOA cant x 1/60) x (length between front of scope to front of rail) = 0.89 mm (0.03 inches) height loss

Note: This is a recommendation. Mil-Rad takes no responsibility for any out-dated data or miscalculations.