Banner Size Calculator

Work out banner size instantly with clear inputs, formula shown and shareable results.

About Banner Size Calculator

Banner pixel dimensions are the size in metres converted to inches at 39.3701 inches per metre, multiplied by the print resolution. Large format printers are usually driven at 100 to 150 dpi because the banner is read from metres away, which keeps file sizes workable.

Formula

Pixel dimensions

pixels = metres x 39.3701 x dpi

Worked example

With the default values below, Banner Size Calculator returns Pixels across of 11,811. Change any input above and every figure here is recalculated in your browser.

Inputs used

Banner widthminimum 0.1 m: 3 m
Banner heightminimum 0.1 m: 1 m
Print resolution at full sizeminimum 1 dpi: 100 dpi

Results

Pixels across: 11,811 px
Pixels down: 3,937 px
Total resolution: 46.50 MP
Flattened RGB file size: 133.0 MB

Step by step

1Values used
2Pixel dimensions
3Pixels across= 11,811 px
4Pixels down= 3,937 px
5Total resolution= 46.50 MP
6Flattened RGB file size= 133.0 MB

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Banner Size figure worked out?

pixels = metres x 39.3701 x dpi. Banner pixel dimensions are the size in metres converted to inches at 39.3701 inches per metre, multiplied by the print resolution.

Why does this matter?

Large format printers are usually driven at 100 to 150 dpi because the banner is read from metres away, which keeps file sizes workable.

What do I need to enter?

Enter banner width, banner height, print resolution at full size. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.