Scope Ring Height and Clearance Calculator

Use this simple calculator to figure out if the scope and ring combination you're using will clear the barrel of your rifle when fitted. This calculator takes into account usage of Butler Creek scope covers as well as the scope mount for traditional bolt rifles.

mm inches
or select a scope hereBushnell Schmidt & Bender Nightforce Premier Reticles Steiner US Optics Kahles Leupold Vortex Athlon Optics

mm inches

mm inches
or select a scope ring hereBadger Spuhr Seekins

mm inches
Set to 0 if using AR-style full rail i.e. Larue OBR, DTA SRS. Also if you have a tapered barrel, add that additional height gain as well.

A 20 MOA cant of 6 inches between the front of your scope and mount can reduce your mount height by 0.89mm. Find your offset.

Calculate Clearance: mount height + ring height - (bell diameter / 2) - cover wrap = 6.50 mm (0.26 inches)PASS!

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