Inches to Pixels at 300 DPI
Type a print size in inches and get the pixels it needs at 300 DPI or any other DPI. The file pixels are not the same as CSS pixels.
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Changing the tag keeps the picture data of a JPEG or PNG unchanged. It does not add pixels.
How to convert inches to pixels
The page starts at 300 DPI with an 8 × 10 inch print, a common frame size.
- Keep the print unit on inches. Type the print width or height in inches; the pixel field beside it fills in.
- Change the DPI if your lab gives one. The pixels follow at once, and the print fields show the inches the new pixels give.
- To go the other way, type pixels in the pixel fields. The print field shows the inches they make at the DPI you set.
- Press a paper button for a whole sheet. The pixels it sets are for the current DPI, in centimetres of paper.
Why 8 × 10 in is the starting size
I start at 8 × 10 in because it is a common frame size. At 300 DPI it needs 2400 × 3000 px, and no rounding is involved. At 300 DPI any size in whole or half inches comes out as a whole number of pixels, so the inch fields on this page never round.
That is the main difference from the centimetre page. Centimetres need a division by 2.54 first, and that is where the rounding comes from. Inches skip the step, so the arithmetic is one multiplication and the answer is easy to check by hand.
Common sizes in inches
| Print size (in) | Pixels at 300 DPI | Pixels at 150 DPI |
|---|---|---|
| 4 × 6 | 1200 × 1800 | 600 × 900 |
| 5 × 7 | 1500 × 2100 | 750 × 1050 |
| 8 × 10 | 2400 × 3000 | 1200 × 1500 |
| 8.5 × 11 | 2550 × 3300 | 1275 × 1650 |
| 11 × 14 | 3300 × 4200 | 1650 × 2100 |
| 16 × 20 | 4800 × 6000 | 2400 × 3000 |
| 20 × 30 | 6000 × 9000 | 3000 × 4500 |
Each pixel count is the inches times the DPI. The calculator runs the same multiplication when you type a size.
Inches, DPI and pixels
Pixels equal inches times the DPI. Eight inches at 300 DPI is 2400 pixels, and at 150 DPI the same eight inches is 1200. Turn it around and 2400 pixels at 300 DPI print 8.00 inches wide, while the same 2400 pixels at 150 DPI print 16.00 inches.
The DPI is the number of image pixels in each inch of paper. Raising it asks for more pixels for the same print. Lowering it gives a bigger print from the same file, which is the choice to make when a lab only accepts a lower density.
Image pixels are not CSS pixels
A CSS pixel is a unit of screen layout that the CSS specification fixes at 1/96 of an inch, so an 8-inch width is 768 CSS pixels on a page, while the same 8 inches at 300 DPI is 2400 pixels in the file.
Use this page for the pixel size of a file you print or send to a lab. For a web page, the CSS width is the number that matters, and it does not depend on the DPI at all.
Checks before you type a size
- Type inches as decimals. Eight and a half inches is 8.5; a fraction such as 8 1/2 is not accepted by the field.
- Lower the DPI to get a bigger print from the same pixels, as the 150 DPI column shows. The file itself does not change.
- Ask the lab for pixels or for inches. If it gives the other, convert it here before you crop.
- Remember the print is the picture, not the sheet. Margins and borders are outside the size you type.
Privacy
Your photo never leaves your device. The page reads its size and DPI in your browser, and a changed photo is saved straight from this page.
Frequently asked questions
How many pixels is 8 inches at 300 DPI?
It is 2400 pixels. Eight inches times 300 DPI is exactly 2400, so no rounding is needed. At 150 DPI the same eight inches needs 1200 pixels, and 2400 pixels printed at 150 DPI is 16 inches wide.
How many pixels are in one inch?
It depends on the DPI you choose: one inch takes 300 pixels at 300 DPI and 150 at 150 DPI. A screen uses a different figure, 96 CSS pixels to the inch, which the CSS specification fixes and which is not a print setting.
What is the difference between inches to pixels and CSS pixels?
A CSS pixel is 1/96 of an inch by definition, so 8 inches is 768 of them on a page. A file pixel is one dot of the image, and at 300 DPI 8 inches is 2400 of them. This page answers the file question only.
Can I type a fraction such as 8 1/2 inches?
Type 8.5. The field takes decimal numbers, so write a half as .5 and a quarter as .25. At 300 DPI, 8.5 inches is 2550 pixels, and that is the figure the page shows.
What happens if I type zero or a negative number?
The page shows a plain message instead of a result: Enter positive dimensions. for a size, or Enter a positive DPI. for the density. No pixel count, print size or infinite value appears in that case.
Related tools and guides
- Work out how large your photo can print: Convert pixels and print dimensions; change JPEG DPI tags.
- Change the DPI of an Image: Set the DPI tag of a JPEG or PNG to 300 in your browser. The pixels stay the same, and the page shows the print size before and after.
- Centimetres to Pixels at Any DPI: Type a print size in centimetres and get the pixels it needs at 300 DPI, or type pixels and get the centimetres back.
- Make a passport photo at home: Passport and visa photos to official sizes, with a printable 10 x 15 cm sheet.
- Make a contact sheet of your photos: Print a page of thumbnails with captions and EXIF lines as a PDF or page images.
- Print a Poster on Multiple Pages: Split a large image into paper sheets for a poster, with overlap and a printable PDF.
- I Built the Tools I Kept Looking For as a Photographer: Why these calculators run in the browser and never upload a file.
- Lake Jasna, Slovenia: My Photography and Visitor Guide: Where the lake photo on this site was taken.