01
Formula
Scaled height = target width × original height ÷ original width.
The simplified ratio uses integers after dividing by the greatest common divisor. PPI = pixels ÷ inches. Pixels per centimeter = PPI ÷ 2.54.
Apply for financingAspect ratio calculator
Aspect ratio calculator and pixels per inch
This aspect ratio calculator reduces width and height by their greatest common divisor and scales a new width to the same ratio. The other mode is a PPI calculator, which is the same division a DPI calculator uses for pixels along a physical edge.
Find
Aspect ratio
16:9
Scaled height720.00 px
Divisor120
Planning estimate from the numbers you enter. Coverage, density, waste and price are assumptions, not a supplier quote or an engineering specification.
How it works
The ratio is the two sides divided by their common divisor.
The greatest common divisor of 1,920 and 1,080 is 120, so the ratio is 16:9. Scaling keeps height / width constant. A target width of 1,280 on a 16:9 frame is 720 pixels tall. Pixels per inch are the pixel count divided by the inches of that same edge. Dots per inch, for this arithmetic, is the same division. The page does not resample an image file. An image size calculator here means the scaled pixel dimensions, not a file's byte size.
02
Example
1,920 by 1,080, scaled to 1,280 wide.
The ratio is 16:9. The scaled height is 720.00 pixels. In the pixels-per-inch mode, 1,920 pixels across 10 inches is 192.0 PPI.
03
Tips
Use the pixel dimensions, not the print shop's name.
A file can be 16:9 and still print soft if the PPI is low for the inches you chose. Divide the pixels by the print inches before you promise a size. This tool does not open the file.
04
Equipment
A print shop's equipment is a separate purchase.
If the business is financing a printer, cutter, or other shop equipment from $15,000 to $2 million, use the button. The pixel count is not the amount.
Important questions
Know what to expect.
Is a DPI calculator different from a PPI calculator?+
On this page they are the same division: pixels, or dots, along an edge divided by the inches of that edge. Enter the pixel count and the physical length.
How does the image size calculator scale?+
Set the width you want. Height follows the original ratio. It does not crop. If you need a different ratio, the height will not match a fixed frame.
Why isn't 1920:1080 left as-is?+
Those numbers share a divisor of 120. Dividing both by 120 gives 16:9, which is the same rectangle.
Does this change the file?+
No. It only reports the ratio, a scaled height, or the pixels per inch from the numbers you type.
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