Bleed Calculator
Add bleed to a trim size for print-ready files.
Quick answer: enter your details below and click Calculate Bleed Size — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter the trim width and height in millimetres.
- Enter the bleed amount, usually 3 mm.
- Click Calculate Bleed Size.
About this tool
Enter a trim width and height plus a bleed amount, and the tool gives the full document size including bleed on all sides. Bleed keeps colour running to the trimmed edge instead of leaving a white sliver.
Frequently asked questions
How much bleed do printers usually want?
3 mm is standard in most regions; some US printers ask for 0.125 inches, which is about 3.18 mm.
Does bleed change the visible page size?
No, the trim size stays the same; bleed is extra area that gets trimmed away.