How do I convert pixels to inches?

Divide the pixel count by the resolution the image will print at. 3000 pixels at 300 DPI is exactly 10 inches, and 2480 pixels at 300 DPI is 8.27 inches, which is 2480 divided by 300, a division that runs 8.266666 and never ends, rounded for display. Type the pixel dimensions and the resolution above and both figures appear, with the division spelled out underneath. One side is enough: leave the height empty and the width is converted on its own.

How many pixels are in one inch?

As many as the resolution says, which is why the field is there. At 300 DPI an inch is 300 pixels, at 150 DPI it is 150, and in a browser layout it is 96, because 96 is the CSS reference resolution. That last one is a convention rather than a measurement: 96 CSS pixels only cover a physical inch on a display that happens to run at 96 pixels per inch, and this page prints that caveat next to the answer when you enter 96, with the matching one for 72.

How many pixels do I need for an 8 by 10 inch print?

2400 x 3000 pixels at 300 DPI, which is the number this page returns when you switch the direction to size to pixels and type 8 and 10. At 150 DPI the same print needs 1200 x 1500, and the table lists the count at every common resolution. Pixel counts are whole numbers, so where the arithmetic lands between two pixels the page rounds to the nearest one and prints the unrounded count beside it.

Why does the page say a figure is rounded?

Because most divisions do not end. 2480 divided by 300 is 8.266666 and on forever, so 8.27 in is a rounded figure and the page says which value it was rounded from. When the arithmetic does end, the full value is printed and nothing is hidden: 3000 at 300 is 10 in, 1000 at 320 is 3.125 in, and 1920 at 96 is 20 in. That distinction is the point of the tool rather than a detail of it. For a 2480 by 3508 pixel image at 300 DPI, the rounded inch dimensions are 8.27 by 11.69.

Is DPI the same as PPI?

For this arithmetic, yes: both mean pixels per inch, and the page treats the two words as one number. The distinction that does matter is elsewhere. A printer's DPI describes the ink dots it lays down, several of which go into one image pixel, so a 1200 DPI printer does not need a 1200 PPI image. The resolution to type here is the one your image is set to print at, which is usually 300 for a photograph.

Can I work in centimetres or millimetres?

Yes, with the unit control, in both directions. One inch is 25.4 mm exactly, so 21 x 29.7 cm at 300 DPI is 2480 x 3508 pixels, and 2480 x 3508 pixels at 300 DPI is 21.0 x 29.7 cm back again. Whichever unit you pick, the inch figure keeps its own cell and the fourth cell shows centimetres, or millimetres when that is the unit you chose.

Does this change my image?

No. This calculator works on the dimensions you type; it does not open or modify an image. To prepare a file for a print size, calculate the needed pixels here, use Image Resizer to resize the image, then use Image DPI Changer to set resolution metadata in a JPEG or PNG. Check the print size in your print software because it may override the stored resolution.

How do I convert inches to pixels?

Choose Size to pixels and Inches, then enter the physical width, optional height and desired pixels per inch. Multiply each inch dimension by that resolution. At 300 PPI, 8.5 inches needs 2550 pixels and 11 inches needs 3300. At 96 PPI those dimensions are 816 by 1056 pixels. Use the resolution required for your output; there is no single conversion factor for every print or screen.

How do I convert pixels to centimetres or millimetres?

Choose Pixels to size and the metric unit. Centimetres equal pixels divided by PPI, multiplied by 2.54; millimetres use 25.4 instead. For example, 300 pixels at 300 PPI are 2.54 cm or 25.4 mm. At 96 PPI the same pixels are 7.9375 cm or 79.375 mm. The calculator also shows inches so you can compare the units.

How large is a 1080 by 1080 or 1920 by 1080 image in inches?

It depends on the resolution. At 300 PPI, 1080 by 1080 pixels print at 3.6 by 3.6 inches, while 1920 by 1080 print at 6.4 by 3.6 inches. At 96 PPI those become 11.25 by 11.25 and 20 by 11.25 inches. Enter your dimensions and intended print resolution rather than assuming the screen size fixes the physical size.

Pixels to Print Size

Convert pixel dimensions to a print size at the resolution you choose. Select inches, centimetres or millimetres, enter one side or both dimensions, and see the calculation alongside a table of common resolutions. Switch to Size to pixels for the reverse calculation. For example, 3000 pixels at 300 pixels per inch is exactly 10 inches; 8.5 by 11 inches at 300 is 2550 by 3300 pixels. Results that need rounding say so. This page calculates dimensions; it does not resize a file or change its resolution metadata.

PRINT SIZE

8.27 x 11.69 in

2480 x 3508 px at 300 DPI · 21.0 x 29.7 cm

Pixels: 2480 x 3508
DPI: 300
Inches: 8.27 x 11.69
Centimetres: 21.0 x 29.7

Width: 2480 px divided by 300 DPI is 8.27 in, which is 21.0 cm.
Height: 3508 px divided by 300 DPI is 11.69 in, which is 29.7 cm.
Rounded for display: the width runs 8.266666 inches and on, printed as 8.27 in.
Rounded for display: the height runs 11.693333 inches and on, printed as 11.69 in.
One inch is 25.4 mm exactly, so the inch, centimetre and millimetre figures are one measurement written three ways.
A pixel has no size until something prints or displays it, so every figure here follows from the 300 DPI you entered. DPI and PPI mean the same number in this arithmetic.

The numbers you have

Enter the pixel dimensions of the image and the resolution it will print at. One side is enough: leave the height empty and the width is converted on its own.

Direction

Width in pxHeight in pxResolution in DPIUnit

Common resolutions: 300 for photo printing, 150 for a poster read at arm's length, 72 or 96 for a screen mock-up. DPI and PPI mean the same number here.

The same job at every common resolution

The pixels stay as you typed them and the print size moves, which is the whole of what a resolution does.

2480 x 3508 px and 8.27 x 11.69 in, row by row
Resolution	Pixels	Inches	Centimetres
72 DPI	2480 x 3508	34.44 x 48.72	87.5 x 123.8
96 DPI	2480 x 3508	25.83 x 36.54	65.6 x 92.8
150 DPI	2480 x 3508	16.53 x 23.39	42.0 x 59.4
200 DPI	2480 x 3508	12.4 x 17.54	31.496 x 44.5516
240 DPI	2480 x 3508	10.33 x 14.62	26.2 x 37.1
300 DPI	2480 x 3508	8.27 x 11.69	21.0 x 29.7
600 DPI	2480 x 3508	4.13 x 5.85	10.5 x 14.9

Worked both ways

The three conversions below run through the very same functions as the answer above them.

2480 x 3508 at 300to inches
8.27 x 11.69
8 x 10 in at 300to pixels
2400 x 3000
Same pixels at 72to inches
34.44 x 48.72

Accuracy. Exact arithmetic: pixels divided by the resolution you enter, both directions on the same page. The resolution is yours to set because a pixel has no physical size of its own until something prints it.

Common questions

How do I convert pixels to inches?: Divide the pixel count by the resolution the image will print at. 3000 pixels at 300 DPI is exactly 10 inches, and 2480 pixels at 300 DPI is 8.27 inches, which is 2480 divided by 300, a division that runs 8.266666 and never ends, rounded for display. Type the pixel dimensions and the resolution above and both figures appear, with the division spelled out underneath. One side is enough: leave the height empty and the width is converted on its own.
How many pixels are in one inch?: As many as the resolution says, which is why the field is there. At 300 DPI an inch is 300 pixels, at 150 DPI it is 150, and in a browser layout it is 96, because 96 is the CSS reference resolution. That last one is a convention rather than a measurement: 96 CSS pixels only cover a physical inch on a display that happens to run at 96 pixels per inch, and this page prints that caveat next to the answer when you enter 96, with the matching one for 72.
How many pixels do I need for an 8 by 10 inch print?: 2400 x 3000 pixels at 300 DPI, which is the number this page returns when you switch the direction to size to pixels and type 8 and 10. At 150 DPI the same print needs 1200 x 1500, and the table lists the count at every common resolution. Pixel counts are whole numbers, so where the arithmetic lands between two pixels the page rounds to the nearest one and prints the unrounded count beside it.
Why does the page say a figure is rounded?: Because most divisions do not end. 2480 divided by 300 is 8.266666 and on forever, so 8.27 in is a rounded figure and the page says which value it was rounded from. When the arithmetic does end, the full value is printed and nothing is hidden: 3000 at 300 is 10 in, 1000 at 320 is 3.125 in, and 1920 at 96 is 20 in. That distinction is the point of the tool rather than a detail of it. For a 2480 by 3508 pixel image at 300 DPI, the rounded inch dimensions are 8.27 by 11.69.
Is DPI the same as PPI?: For this arithmetic, yes: both mean pixels per inch, and the page treats the two words as one number. The distinction that does matter is elsewhere. A printer's DPI describes the ink dots it lays down, several of which go into one image pixel, so a 1200 DPI printer does not need a 1200 PPI image. The resolution to type here is the one your image is set to print at, which is usually 300 for a photograph.
Can I work in centimetres or millimetres?: Yes, with the unit control, in both directions. One inch is 25.4 mm exactly, so 21 x 29.7 cm at 300 DPI is 2480 x 3508 pixels, and 2480 x 3508 pixels at 300 DPI is 21.0 x 29.7 cm back again. Whichever unit you pick, the inch figure keeps its own cell and the fourth cell shows centimetres, or millimetres when that is the unit you chose.
Does this change my image?: No. This calculator works on the dimensions you type; it does not open or modify an image. To prepare a file for a print size, calculate the needed pixels here, use Image Resizer to resize the image, then use Image DPI Changer to set resolution metadata in a JPEG or PNG. Check the print size in your print software because it may override the stored resolution.
How do I convert inches to pixels?: Choose Size to pixels and Inches, then enter the physical width, optional height and desired pixels per inch. Multiply each inch dimension by that resolution. At 300 PPI, 8.5 inches needs 2550 pixels and 11 inches needs 3300. At 96 PPI those dimensions are 816 by 1056 pixels. Use the resolution required for your output; there is no single conversion factor for every print or screen.
How do I convert pixels to centimetres or millimetres?: Choose Pixels to size and the metric unit. Centimetres equal pixels divided by PPI, multiplied by 2.54; millimetres use 25.4 instead. For example, 300 pixels at 300 PPI are 2.54 cm or 25.4 mm. At 96 PPI the same pixels are 7.9375 cm or 79.375 mm. The calculator also shows inches so you can compare the units.
How large is a 1080 by 1080 or 1920 by 1080 image in inches?: It depends on the resolution. At 300 PPI, 1080 by 1080 pixels print at 3.6 by 3.6 inches, while 1920 by 1080 print at 6.4 by 3.6 inches. At 96 PPI those become 11.25 by 11.25 and 20 by 11.25 inches. Enter your dimensions and intended print resolution rather than assuming the screen size fixes the physical size.

Exact arithmetic: pixels divided by the resolution you enter, both directions on the same page. The resolution is yours to set because a pixel has no physical size of its own until something prints it.