Life & Health Β· π°π· Korea
Print Bleed & Margin Calculator
Calculate print bleed, safe margin, and 300dpi resolution for Korean print specs.
About this tool
Print Bleed & Margin Calculator turns a finished trim size + bleed (default 3 mm) + safe margin (default 5 mm) + fold style (half / tri-fold roll / Z / gatefold / booklet spread) into an SVG preview that draws the trim, bleed, safe, and fold lines, plus mm / inch / 72-150-300-600 dpi pixel conversions. Color-coded lines drop straight into Adobe Illustrator / InDesign / Photoshop "Document Setup" and "Master Page" β preventing the classic disasters of cropped text or empty edges on cards, flyers, and banners. Share a URL with your print shop to lock in identical specs.
Use cases
Scenario 1
Business card 90Γ50 with bleed
Add 3 mm bleed to a 90Γ50 mm Korean business card to get a 96Γ56 mm working size and a safe area 5 mm in from the trim, then mirror the spec in Illustrator.
Scenario 2
3-fold brochure fold-line layout
For a tri-fold (roll fold) on landscape A4, auto-apply the -2 mm trim on the inner panel so it folds clean, with exact panel widths.
Scenario 3
Poster pixel size at 300 dpi
Convert an A2 poster trimmed to 426Γ600 mm with bleed into 5031Γ7087 px at 300 dpi for an exact Photoshop canvas.
Scenario 4
Wedding flyer + share with print shop
Send the share URL of your wedding-card size to the print shop so both sides see the same SVG spec β eliminating "is the bleed actually 3 mm?" round-trips.
Scenario 5
Booklet spread (left & right page)
Auto-lay a 64-page A5 booklet in spread mode with the center fold and per-page safe areas instantly visible.
Features
- 6+ presets: A4, A5, B5, business card, postcard, poster, banner
- 3 mm bleed + 5 mm safe margin defaults + per-shop presets
- 6 fold modes (none / half / tri-fold roll / Z / gate / booklet spread)
- Live SVG preview (trim, bleed, safe, fold lines)
- mm / inch / 72-150-300-600 dpi pixel table
- URL share to align specs with your print shop
- Bilingual KR/EN UI
Frequently asked
- Q. Why 3 mm bleed?
- A. It is the Korean/Japanese print convention. The U.S. uses 1/8" (~3.175 mm) and parts of Europe 5 mm β the tool offers per-shop presets.
- Q. What must stay inside the 5 mm safe area?
- A. Critical text, logos, and key parts of images β anything that would suffer from a Β±2 mm trim β must sit inside the safe area. Backgrounds extend out to the bleed.
- Q. Why is the inner panel of a tri-fold -2 mm?
- A. In a roll fold the inner panel is folded twice; if it matches the outer panels, the paper jams. Trim it ~2 mm shorter for a clean fold.
- Q. Why is 300 dpi the print standard?
- A. At 300 dpi the human eye stops resolving pixels at typical reading distance. Cards, brochures, and magazines all need 300 dpi+; outdoor banners and large posters often live happily at 150 dpi.
- Q. Do shops have different bleed / margin rules?
- A. Yes β some shops require 4 mm bleed and 7 mm safe area. The tool ships per-shop presets and accepts custom values.
Sources / references
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How we run it / disclaimer
This tool is advisory and does not constitute legal, tax, medical, or financial advice. All calculations and document generation run in your browser; inputs are never sent to a server. Ads follow Google AdSense policy and are kept separate from tool accuracy.