Calculate the largest whole-pixel golden-ratio candidate rectangle inside a source image, including exact edge exclusions and retained pixels.
A quick decision brief for this specific tool
Current source whole-pixel width/height and a landscape or portrait candidate orientation
Largest inscribed whole-pixel candidate rectangle, actual/target ratio, four edge offsets and retained/excluded pixel percentages
Use exact φ, inscribe the requested orientation inside the source, floor the constrained side to whole pixels, and split excluded pixels across a centered candidate
Choose your path
Calculate one auditable whole-pixel golden-ratio candidate rectangle and its exclusions without scoring composition or changing the source image.
See the maximum φ-oriented rectangle before moving the crop around the subject.
Enter the selected file version’s whole pixel dimensions and orientation, then inspect edge exclusions.
Gets a reproducible candidate while retaining visual placement and acceptance decisions.
Know exactly which pixels a centered candidate would exclude.
Review four edge offsets and retained/excluded percentages against protected content.
Can reject or reposition the candidate without treating φ as a rule.
Keep candidate crop geometry separate from the accepted final export.
Save candidate outputs to the Project, then record the actual accepted crop/version before print sampling.
Avoids overwriting final pixel data or confusing a proposal with the delivered file.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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The target uses φ = (1 + √5) / 2. Landscape uses width divided by height equal to φ; portrait uses width divided by height equal to 1/φ.
φ = (1 + √5) / 2; landscape W/H = φ; portrait W/H = 1/φThe calculator preserves the full limiting side, floors the other side to a whole pixel, and never extends beyond the entered source. Whole-pixel rounding means the actual ratio can differ slightly from exact φ.
Constrained side = floor(limiting side × target ratio) or floor(limiting side ÷ target ratio)Any excluded width or height is split across opposite edges. When an odd pixel cannot split evenly, the right or bottom edge receives the remaining pixel. Retained and excluded percentages use source and candidate pixel area.
retained % = candidate pixel area ÷ source pixel area × 100Updated: August 2026
Enter 4000 × 3000 pixels to record a 4000 × 2472 whole-pixel candidate, then inspect the top and bottom exclusions before moving the crop around important content.
Choose portrait orientation, review all four excluded edges, and compare alternate crop positions around eyes, hands, text, products, and required safe areas.
Save this candidate beside the selected file, but send only the actual accepted export dimensions to the print-sampling step after provider ratio, bleed, border, and proof requirements are known.
Compare alternate positions and other aspect ratios against the subject, brief, protected content, and delivery requirements before choosing.
Keep candidate dimensions separate from the accepted export. Preserve the source and record the actual approved crop version before print or delivery checks.
Use this calculator to create one auditable, centered rectangle whose width-to-height ratio is as close as whole pixels allow to φ or its portrait rotation. It reports geometry only. It does not decide subject placement, visual balance, delivery suitability, or which crop should be accepted.