Pixels to Inches Converter (PX to IN) & Print Size Calculator
Convert pixels to inches, cm, mm, points and rem at any DPI, check how large a photo will print and whether it's sharp enough, get paper sizes in pixels, and calculate screen PPI with a card-calibrated ruler.
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<a href="https://www.toolnova.org/utilities/pixel-to-inches-calculator">Pixel to Inches Calculator</a> by ToolNova
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ToolNova. (2026, October 17). Pixel to Inches Calculator [Online tool]. https://www.toolnova.org/utilities/pixel-to-inches-calculator
MLA
“Pixel to Inches Calculator.” ToolNova, 17 Oct. 2026, www.toolnova.org/utilities/pixel-to-inches-calculator.
Convert pixels to inches (and back) accurately
Set your resolution (DPI/PPI) once and every calculator on the page uses it. Convert a value between pixels, inches, centimeters, millimeters, points, picas, rem, feet and meters with the formula shown; drop in a photo to read its pixel size and stored DPI, see its print size and a quality verdict for 16 standard print sizes; work out the pixels needed for any paper size with bleed; and calculate screen PPI or calibrate an on-screen ruler with a bank card. DPI is the setting most converters get wrong, 96 for screens, 300 for print, and it decides how many pixels make one physical inch. Everything runs in your browser; images are never uploaded.
Set your DPI/PPI once, then use four calculators that share it: a unit converter (px, in, cm, mm, pt, pica, rem, ft, m) with the working shown, an image and print-size checker that reads a photo's pixel size and stored DPI, a paper-size table in pixels, and a screen PPI calculator with a card-calibrated on-screen ruler. The DPI is what most converters get wrong, 96 for screens versus 300 for print, and it decides how many pixels make one physical inch.
Features
Convert px, in, cm, mm, pt, pica, rem, ft and m at any DPI, with the formula worked out
DPI presets (72, 96, 150, 240, 300, 600) plus any custom value, shared by every tab
Same value compared at six common resolutions, plus a conversion chart with CSV export
Batch convert a list of values at once
Image checker: reads pixel size and stored DPI (JPEG JFIF/EXIF, PNG pHYs) from a dropped or pasted photo
Print size, megapixels, aspect ratio and largest print at 300/240/180/150/100 DPI
Print-quality verdict with effective DPI and crop % for 16 standard print sizes
Print size to pixels needed, with 0.125 in / 3 mm bleed
37 paper, photo and card sizes in pixels at any DPI, portrait or landscape
Screen PPI calculator with 18 device presets, dot pitch and retina distance
Card-calibrated on-screen ruler and real-size preview
Runs in your browser; images never leave your device
How to use Pixel to Inches Calculator
1
Set your DPI
Pick a preset (96 for screens and CSS, 300 for print) or type any value. Every tab uses it, and the settings bar shows what one inch, one centimetre and one pixel equal at that resolution.
2
Convert a value
On Unit converter, choose From and To units and type a number. The result, the working, every other unit and a chart all update as you type. Click any card to copy it.
3
Check an image for print
On Image & print size, drop, paste or choose a photo (or type its width and height). You get its print size, the largest sharp print, and a verdict for 16 standard sizes. Switch direction to find the pixels needed for a print size, with bleed.
4
Look up paper sizes or your screen
Paper sizes lists A-series, US, photo and card formats in pixels at your DPI. Screen PPI & ruler calculates any display's pixel density and lets you calibrate a real-size ruler with a bank card.
Common use cases
Sizing an image in inches for print from its pixel dimensions
Converting px to pt or rem for CSS typography
Checking whether a photo has enough pixels for a print size
Matching on-screen dimensions to physical cm/mm
Translating design specs between px and physical units
Converting inches to pixels for print and digital layouts
Calculating physical image size from pixel width and height
Checking common print dimensions such as 4×6, 8×10, A4, and US Letter
Estimating image print size at 96, 150, 300, or 600 DPI
Reading the DPI stored in a JPEG or PNG before sending it to a printer
Adding bleed to a flyer or card and getting the exact pixel canvas size
Working out a monitor's or phone's PPI from resolution and screen size
Measuring real inches or centimetres on screen after card calibration
Detailed guide
Pixel to inches conversion formula
To convert pixels to inches, divide the pixel value by the DPI or PPI: inches = pixels ÷ DPI. For example, 1200 pixels at 300 DPI equals 4 inches. To convert inches back to pixels, multiply the physical size by the DPI: pixels = inches × DPI. The same formulas can be used for image dimensions, print layouts, and other physical-size calculations when the correct resolution is known.
Inches to pixels: how to convert physical size to pixels
To convert inches to pixels, multiply the number of inches by the desired DPI or PPI. For example, a 4-inch-wide image at 300 DPI requires 1200 pixels across. At 96 DPI, the same 4-inch width corresponds to 384 pixels. Because the result depends on the selected resolution, there is no single fixed number of pixels in one physical inch.
Pixels per inch (PPI) and what it means
PPI means pixels per inch and describes how many pixels are represented across one physical inch. A value of 96 PPI means 96 pixels per inch, while 300 PPI means 300 pixels per inch. This is why the same pixel dimensions can represent different physical sizes at different resolutions. For pixel-to-inch calculations, the selected DPI/PPI value provides the relationship between digital pixels and physical inches.
DPI vs PPI for pixel conversion
PPI (pixels per inch) describes digital pixel density, while DPI (dots per inch) traditionally describes printer output density. In practical image and print calculations, DPI and PPI are often used as the resolution value that determines physical size. For example, 300 pixels at 300 PPI represent 1 inch, while 300 pixels at 96 PPI represent 3.125 inches. Always use the resolution appropriate for the screen, image, or print workflow you are working with.
How to convert image pixel dimensions to print size
To find the physical print size of an image, divide its pixel width and height by the target DPI. For example, an image measuring 1800 × 1200 pixels at 300 DPI prints at 6 × 4 inches because 1800 ÷ 300 = 6 and 1200 ÷ 300 = 4. The same calculation works for other image dimensions such as 2400 × 3000 pixels, 2550 × 3300 pixels, or 6000 × 4000 pixels. Enter the pixel dimensions and your intended DPI to calculate the corresponding physical size.
Pixels to inches for printing
For print projects, 300 DPI is a common target for high-quality images, although the appropriate resolution depends on the printer, viewing distance, and type of artwork. For example, a 1200 × 1800 pixel image at 300 DPI produces a 4 × 6 inch print. A 2400 × 3000 pixel image at 300 DPI produces an 8 × 10 inch print. Changing the DPI changes the physical size represented by the same number of pixels, so checking both pixel dimensions and resolution is important before printing.
Common pixel-to-inch conversions
The physical size represented by a pixel value depends on DPI. At 300 DPI, 300 pixels equals 1 inch, 600 pixels equals 2 inches, 1200 pixels equals 4 inches, 1800 pixels equals 6 inches, 2400 pixels equals 8 inches, and 3000 pixels equals 10 inches. At 96 DPI, the same pixel values represent larger physical dimensions. Use the calculator above when you need an exact conversion for a custom pixel value or resolution.
Common paper sizes in pixels
Standard paper dimensions can also be converted between inches and pixels by choosing a resolution. An A4 page is approximately 8.27 × 11.69 inches, which corresponds to about 2480 × 3508 pixels at 300 DPI. US Letter is 8.5 × 11 inches, corresponding to 2550 × 3300 pixels at 300 DPI. These values are useful when preparing documents, flyers, photos, or graphics for print.
Made for print and design work
Designers use it to size images for print, set canvas dimensions, and check whether a photo has enough resolution before it goes to a printer. Because it exposes the DPI directly, you can plan assets at the correct physical size instead of guessing. It can also help when translating dimensions between pixels, inches, centimeters, millimeters, points, picas, and rem.
Pixels to inches chart at 72, 96, 150 and 300 DPI
The same pixel count gives a different physical size at every resolution, so a chart only makes sense per DPI. Inches = pixels ÷ DPI, rounded to two decimals below. The converter above prints this chart for any DPI and any unit pair, and exports it as CSV.
Pixels
72 DPI
96 DPI
150 DPI
300 DPI
100 px
1.39 in
1.04 in
0.67 in
0.33 in
300 px
4.17 in
3.13 in
2 in
1 in
500 px
6.94 in
5.21 in
3.33 in
1.67 in
720 px
10 in
7.5 in
4.8 in
2.4 in
1000 px
13.89 in
10.42 in
6.67 in
3.33 in
1080 px
15 in
11.25 in
7.2 in
3.6 in
1200 px
16.67 in
12.5 in
8 in
4 in
1920 px
26.67 in
20 in
12.8 in
6.4 in
2400 px
33.33 in
25 in
16 in
8 in
3000 px
41.67 in
31.25 in
20 in
10 in
3840 px
53.33 in
40 in
25.6 in
12.8 in
1050 px
14.58 in
10.94 in
7 in
3.5 in
1500 px
20.83 in
15.63 in
10 in
5 in
2048 px
28.44 in
21.33 in
13.65 in
6.83 in
2500 px
34.72 in
26.04 in
16.67 in
8.33 in
2550 px
35.42 in
26.56 in
17 in
8.5 in
3300 px
45.83 in
34.38 in
22 in
11 in
Paper sizes in pixels at 72, 150 and 300 DPI
Pixel dimensions for common paper and photo sizes, portrait orientation, rounded to the nearest pixel. ISO sizes (A5, A4, A3) are defined in millimetres and US sizes in inches, which is why A4 does not land on round numbers. The Paper sizes tab lists 37 formats at any DPI, flips them to landscape, and sends a size to the print calculator so you can add bleed.
Size
72 DPI
150 DPI
300 DPI
A5 (148 × 210 mm)
420 × 595
874 × 1240
1748 × 2480
A4 (210 × 297 mm)
595 × 842
1240 × 1754
2480 × 3508
A3 (297 × 420 mm)
842 × 1191
1754 × 2480
3508 × 4961
US Letter (8.5 × 11 in)
612 × 792
1275 × 1650
2550 × 3300
US Legal (8.5 × 14 in)
612 × 1008
1275 × 2100
2550 × 4200
Tabloid (11 × 17 in)
792 × 1224
1650 × 2550
3300 × 5100
4 × 6 in photo
288 × 432
600 × 900
1200 × 1800
5 × 7 in photo
360 × 504
750 × 1050
1500 × 2100
8 × 10 in photo
576 × 720
1200 × 1500
2400 × 3000
How big can I print my photo? Megapixels to print size
Divide each side in pixels by the DPI you want. 300 DPI is the usual target for prints viewed up close, 240 DPI is what many photo labs accept, and 150 DPI is fine for posters seen from a few feet away. Drop a photo into the Image & print size tab to get these numbers for your own file, plus a verdict for 16 standard print sizes.
Is my image good enough to print? Effective DPI explained
When a lab prints a photo on a paper size with a different shape, it scales the image until it covers the whole sheet and trims the overflow. The resolution that matters is the effective DPI: pixels divided by inches along the tighter side after that scaling. A 3000 × 2000 px photo on 8 × 10 in paper has an effective 250 DPI and loses about 17% of the image to cropping, while on 4 × 6 in it prints at 500 DPI with no crop. The print checker rates each size with common print-shop bands: 300+ excellent, 240+ very good, 180+ good, 120+ fair, below that visibly pixelated.
Effective DPI
Rating
What to expect
300 or more
Excellent
Sharp even when held close
240 – 299
Very good
Photo-lab quality
180 – 239
Good
Fine at arm's length
120 – 179
Fair
Soft up close, acceptable on a wall
Below 120
Low
Visible pixels or blur
Does changing an image's DPI change its quality?
No. DPI stored in a JPEG or PNG is only a label that tells software how large to print the pixels; it does not add or remove any. Changing 72 DPI to 300 DPI without resampling keeps every pixel and simply prints the image smaller. Only resampling (changing the pixel dimensions) alters quality. The image checker shows the DPI your file claims, read from its JFIF, EXIF or PNG pHYs data, and lets you apply it with one click, but the print size is always calculated from the real pixel count.
Screen pixel density is the diagonal in pixels divided by the diagonal in inches: PPI = √(width² + height²) ÷ diagonal. A 27-inch 2560 × 1440 monitor works out to about 108.8 PPI, so one physical inch on that screen holds roughly 109 pixels. The Screen PPI tab also gives dot pitch, the visible width and height, and the viewing distance beyond which single pixels blend together for 20/20 vision.
Browsers treat 96 CSS pixels as an inch, but a real inch on your monitor is almost never exactly 96 CSS pixels. To see true size, hold a bank or ID card (85.60 × 53.98 mm, the same on every card worldwide) against the screen and resize the outline until it matches. The tool then draws an accurate inch or centimetre ruler and can show any size at real scale, for example how big 1200 × 600 px will look printed at 300 DPI. Keep browser zoom at 100% while measuring.
Frequently asked questions
How do I convert pixels to inches?
Divide the number of pixels by the DPI or PPI: Inches = Pixels ÷ DPI. For example, at 96 DPI, 960 pixels = 10 inches. At 300 DPI, 960 pixels = 3.2 inches.
How do I convert inches to pixels?
Multiply the physical size in inches by the DPI or PPI: Pixels = Inches × DPI. For example, 4 inches at 300 DPI requires 1200 pixels. The result changes when you use a different DPI.
What DPI should I use for printing?
300 DPI is a common target for high-quality print. Photography and other high-resolution work may use 300–600 DPI depending on the printer and intended viewing distance. Standard web display commonly uses 72–96 DPI as a reference.
What is the difference between DPI and PPI?
PPI (Pixels Per Inch) refers to digital pixel density, while DPI (Dots Per Inch) traditionally refers to printer output resolution. For practical pixel-to-physical-size calculations, the selected DPI/PPI value determines how many pixels correspond to one inch.
How many pixels are in one inch?
There is no single fixed number of pixels in a physical inch. The answer depends on the selected pixel density. At 96 PPI, one inch corresponds to 96 pixels. At 300 PPI, one inch corresponds to 300 pixels.
Why does 96 PPI equal 1 inch in CSS?
CSS uses a reference pixel where 1 inch is defined as 96 CSS pixels. This is a logical web measurement and does not mean every physical monitor has exactly 96 pixels per physical inch. High-density displays can have a much higher physical PPI while CSS continues to use its reference measurements.
How do I calculate the print size of an image?
Divide the image's pixel width and height by the target DPI. For example, an 1800 × 1200 pixel image at 300 DPI prints at 6 × 4 inches. Width = 1800 ÷ 300 = 6 inches and height = 1200 ÷ 300 = 4 inches.
How many pixels is an A4 page at 300 DPI?
An A4 page is approximately 210 × 297 mm, or 8.27 × 11.69 inches. At 300 DPI, that is approximately 2480 × 3508 pixels. At 72 DPI, it is approximately 595 × 842 pixels.
How many pixels is US Letter paper at 300 DPI?
US Letter is 8.5 × 11 inches. At 300 DPI, that corresponds to 2550 × 3300 pixels.
What is a Retina display and how does it affect pixel-to-inch conversion?
A Retina display has a much higher physical pixel density than many standard displays. A screen can therefore contain far more physical pixels per inch while websites still use logical CSS pixels. For image assets, higher-density displays often require higher-resolution images to appear sharp.
What DPI should I use for print vs screen?
Use a resolution appropriate to the output. Around 300 DPI is a common target for high-quality print, while 72–96 DPI is commonly used as a reference for screen and web dimensions. The calculator lets you enter a custom DPI/PPI so the conversion matches your workflow.
How big will my image print from its pixel size?
Divide each pixel dimension by the print DPI. A 1800 × 1200 px image at 300 DPI prints at 6 × 4 inches. Enter the pixel dimensions and 300 DPI to calculate the print size.
Why does the same number of pixels produce different inch sizes?
Because physical size depends on pixel density. For example, 1200 pixels at 300 DPI equals 4 inches, while 1200 pixels at 96 DPI equals 12.5 inches. Pixels describe digital dimensions, while DPI/PPI establishes their physical scale.
How many pixels do I need for a 4×6 inch photo?
At 300 DPI, a 4×6 inch photo requires 1200 × 1800 pixels. At another DPI, multiply each physical dimension by the selected DPI to calculate the required pixel dimensions.
How many inches is 1080 pixels?
It depends on the DPI. 1080 pixels is 15 inches at 72 DPI, 11.25 inches at 96 DPI, 7.2 inches at 150 DPI and 3.6 inches at 300 DPI. The converter shows all common resolutions side by side.
How do I check the DPI of an image?
Drop the file into the Image & print size tab. It reads the resolution stored in the file (JPEG JFIF or EXIF, PNG pHYs) and shows it next to the pixel dimensions, or tells you when no DPI is stored. The file is read in your browser and never uploaded.
Does changing DPI from 72 to 300 improve image quality?
No. DPI is metadata that sets how large the pixels print. Changing it without resampling keeps exactly the same pixels, so the image just prints smaller and denser. To get a sharp large print you need more pixels in the original.
How many megapixels do I need for an 8×10 print?
At 300 DPI an 8×10 inch print needs 2400 × 3000 pixels, about 7.2 megapixels. At 240 DPI, which many photo labs accept, it needs 1920 × 2400 pixels, about 4.6 megapixels.
What is bleed and how many pixels does it add?
Bleed is extra image beyond the trim line so no white edge shows after cutting, usually 0.125 inch (3 mm) per side. At 300 DPI that adds 75 pixels to each dimension, so a US Letter flyer becomes 2625 × 3375 pixels instead of 2550 × 3300.
How many pixels is A4 at 150 DPI?
A4 (210 × 297 mm) is 1240 × 1754 pixels at 150 DPI, 2480 × 3508 at 300 DPI and 595 × 842 at 72 DPI.
How do I calculate my screen's PPI?
Divide the diagonal resolution by the diagonal size: PPI = √(width² + height²) ÷ diagonal inches. A 27-inch 2560 × 1440 monitor is about 108.8 PPI. The Screen PPI tab does this for any display and includes presets for common monitors, laptops and phones.
How can I see real inches on my screen?
Calibrate first: hold a bank or ID card against the screen and resize the outline until it matches (these cards are 85.60 × 53.98 mm worldwide). The tool then draws an accurate ruler and can show any size at real scale. Keep browser zoom at 100%.
