Bleed Calculator

Bleed Calculator

Bleed is one of the simplest concepts in print graphic design — and one of the most ignored by those just starting out.

When artwork is printed and cut, the cut is never exact to the millimeter. There is mechanical variation that can result in an unwanted white border if the artwork has no bleed. Bleed solves this by extending the elements that reach the edge beyond the trim line.

The most common standard is 3mm of bleed on each side for offset printing. For large formats such as banners and vinyl, 5mm or more. For packaging with die-cutting, the bleed must be calculated together with the internal safety margin area.

The safety area is the opposite of bleed. If bleed ensures the color reaches the edge, the safety margin ensures that important text won't be cut. The minimum standard is 3mm inside the trim line. For packaging with folds and scores, that value must account for the mechanical tolerance of each process.

The calculator performs this calculation automatically from the project dimensions. The kind of check that prevents the file from being sent back by the printer — or worse, the material being printed incorrectly.