Canvas Depth Calculator

The canvas to cut for a stretched canvas, from the finished size, the wrap allowance and the edges being wrapped.

Finished canvas length (long side) mm

The face of the finished canvas, which is the outside dimension of the stretcher.

Finished canvas width (short side) mm

Wrap type

The value is the wrap allowance in millimetres per wrapped edge. A gallery wrap is hung without a frame, a standard wrap sits in one.

Edges that wrap around the bar

A canvas in a frame may only need two edges wrapped, because the rebate hides the others.

Wrap allowance per wrapped edge mm

The fabric that covers the side of the bar. Fifty to seventy five millimetres for a gallery wrap, about forty for a standard wrap.

Fold allowance onto the back of the bar mm

The fabric that folds onto the back and takes the staples. Fifteen to forty millimetres is the usual range.

Trimming margin on every edge mm

A little extra so an out of square cut can be corrected before stretching.

Canvas roll width mm

Common roll widths are 1500 mm and 2100 mm. Used to check the piece fits across the roll.

Price of canvas per square metre

Optional. Used for the fabric cost of the piece.

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