Docs
Arrow FOC Calculator — Front of Center for Archery
Technical reference documents covering the formulas, methodology, and data behind Arrow FOC Calculator — Front of Center for Archery. Use these to understand exactly how calculations are performed.
Arrow Spine and FOC: Selection Guide for Heavy Broadheads
How FOC affects dynamic spine selection — when to go stiffer for heavy points, and how front weight interacts with arrow spine ratings for bowhunting.
Read doc →FOC Formula and AMO/ATA Standard Measurement Method
The official ATA FOC formula, how to measure balance point correctly, and how arrow component weights contribute to front of center percentage.
Read doc →