Eyelet Placement Calculator

The eyelet placement calculator provides planning for grid-based eyelet layouts used in fabric, leather, and craft projects. It targets hobbyists, tailors, small manufacturers, and workshop planners who need repeatable results and material efficiency.
The tool accepts inputs defining a grid: holes_per_row, rows, horizontal_spacing_mm, vertical_spacing_mm, step margins (edge_margin_mm), plus eyelet dimensions (eyelet_outer_diameter_mm, eyelet_inner_diameter_mm) and fabric_thickness_mm. It validates basic constraints such as positive counts, positive spacings, and outer_diameter > inner_diameter.
Core outputs include total_eyelets, sheet_length_mm, and sheet_width_mm. Optional guidance may suggest a compatible eyelet size and an estimated punch_force_kgf for planning with a given press. The underlying logic converts a 2D grid into a practical sheet footprint and piece count, enabling repeatable layouts across multiple panels or belts.
The value comes from reducing trial-and-error during layout, enabling faster prototyping, inventory planning, and quality control in small-scale production or craft workflows. Use cases range from belt and strap finishing to garment plackets and leather goods, where consistent spacing and margins matter for durability and appearance. The tool emphasizes accuracy in dimensions and alignment, supporting designers and shop floor operators without performing material optimization or price estimation.