Useful math, visible assumptions.

Hanging marks

The desired frame center describes where the artwork should sit. The hardware drop converts that visual position into the physical mark for the hook or nail.

For two hooks, the entered separation is divided equally around the frame centerline. Measure hanging wire under upward tension. Hangometry does not determine whether a fastener is safe for a wall or load.

Art proportion

For art visually anchored to a sofa, bed, or console, the size planner returns a working range of 60–75% of that reference width.

This is intentionally a range, not a claim that one proportion fits every room. Wall height, negative space, architecture, viewing distance, and personal preference can justify a different choice. Test the outline with painter’s tape.

Mixed-frame layouts

The mixed planner treats every outer frame as a rectangle. Row layouts align frame centers; grids size each column and row to its largest member; staggered layouts split frames into two centered rows.

Offsets describe visual frame centers, not fastener locations. Use the hanging calculator for each frame after the arrangement is approved.

Frames and mats

The mat opening subtracts the chosen overlap from every artwork edge. The outside estimate then adds the mat border and visible frame face.

Frame suppliers may describe dimensions differently. Confirm the rebate, overlap, glass, backing, and moulding profile before ordering or cutting. Valuable work belongs with a conservation framer.

Print resolution

Physical print size is pixel count divided by target pixels per inch. The tool says PPI because image sampling and printer dot placement are different concepts, even though labs sometimes use DPI informally.

Pixel density alone cannot guarantee quality. Focus, compression, noise, sharpening, paper, print process, and viewing distance matter.