# 300 Pixels Per Inch Explained: Print Size and Resolution (2026)

> 300 pixels per inch explained: divide pixel dimensions by 300 for print size. A print size chart, PPI vs DPI, and how viewing distance sets the target.

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Published November 6, 2026 · Daniel Tello · RevelRaw

**Quick answer:** 300 PPI means 300 image pixels per inch of print. Divide each pixel dimension by 300 to get the print size in inches: a 6,000 × 4,000-pixel file prints at 20 × 13.3 inches. Multiply inches by 300 to get the pixels a print needs. 300 is a target for prints held in the hand, not a pass mark; a large print seen from across a room needs far fewer, and typing a new PPI value without resampling changes the print size, not the detail.

You've finished editing a photograph, chosen the paper, and reached the resolution box in the export window. It asks for PPI, the lab's instructions mention DPI, and you want to know whether typing 300 will make the print sharp. It won't on its own. What decides the print is the photograph's pixel dimensions, the size you want on paper, and how close people will stand to it.

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## What Does 300 Pixels Per Inch Mean?

PPI is a density, not an image size. It says how many of the file's pixels land along each inch of paper, so it only means something once you tie it to a print size. A pixel-to-inch converter such as [Intelligent Calculator's pixel-to-inch explanation](https://intelcalculator.com/conversion/pixels-to-inches/) does the same division used throughout this guide: inches = pixels ÷ PPI, so at 300 PPI, 300 pixels make one inch.

Your file's pixel dimensions are fixed by the camera and your crop. Print the same pixels smaller and they pack more tightly; print them larger and they spread out. Nothing is gained or lost in the file when you change the physical size, which is why a high-megapixel file can look soft as a giant print and a modest one can look crisp at 5 × 7.

> **Practical rule:** Always pair a PPI value with a print size. A resolution label on its own says nothing about how much detail the print will show.

300 is also a long-standing scanning default for photos and documents, and the [Library of Congress's personal digital archiving guidance](https://blogs.loc.gov/thesignal/2013/06/what-people-are-asking-about-personal-digital-archiving/) answers the questions people most often ask about preserving their own photos and files. Treat the number as a sensible starting target, not a guarantee: focus, the size you print and the viewing distance still decide what people see.

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## How Do You Calculate Print Size From Pixels?

Divide the pixel width by the target PPI to get the print width in inches, and the pixel height by the same number to get the print height. A 3,000 × 2,400-pixel photograph gives 10 × 8 inches at 300 PPI; a 6,000 × 4,000-pixel file from a 24-megapixel camera gives 20 × 13.33 inches before cropping.

The calculation runs both ways:

- **Start with a photograph:** divide its pixel dimensions by your chosen PPI to find the print size.
- **Start with a print order:** multiply the width and height in inches by the target PPI to find the pixels you need.
- **Start with a layout:** use the image area, not the full sheet, when a mat, border or page margin surrounds the photo.

Pixels needed for common print sizes at 300 PPI (width × height in inches, times 300):

| Print size (inches) | Pixels needed | Megapixels | Typical use |
| --- | --- | --- | --- |
| 4 × 6 | 1,200 × 1,800 | 2.16 | Snapshots and small prints |
| 5 × 7 | 1,500 × 2,100 | 3.15 | Framed desk prints |
| 8 × 10 | 2,400 × 3,000 | 7.2 | Portraits and portfolio prints |
| 12 × 18 | 3,600 × 5,400 | 19.44 | Wall prints |
| 20 × 30 | 6,000 × 9,000 | 54 | Large posters |
| 13.33 × 20 | 4,000 × 6,000 | 24 | A full, uncropped 24-megapixel frame |

### Check the final crop, not the original

Read the pixel width and height, not the file size in megabytes: Finder's Get Info shows them under Dimensions, and so does Preview's Inspector (Tools > Show Inspector). Then check that the photograph's proportions match the paper. A 3:2 camera frame on 8 × 10 paper loses part of its long side to the crop, and the pixels you crop away are gone from the print, so calculate from the finished crop.

Borderless printing can crop again, because the driver enlarges the image slightly past the paper edge. The guide to [printing without margins](https://revelraw.com/blog/how-to-print-without-margins.md) explains how to keep image dimensions and edge-to-edge coverage apart. For poster-size jobs, Cobra DTF has a vendor guide on how to [enlarge photos for sharp poster prints](https://cobradtf.com/blogs/guides/blowing-up-photos-to-poster-size).

The result of the calculation is the size at a chosen density. It is not a limit on how large the photograph may ever be printed, as the viewing-distance section below shows.

## Is PPI the Same as DPI?

No. PPI describes image pixels; DPI describes printer dots. They belong to different stages of making a print, though apps and print instructions often use the terms loosely. When a lab asks for a “300 dpi file,” it means 300 pixels per inch at the print size.

A pixel isn't an ink dot. An inkjet builds each pixel's color from many smaller dots, so the printer's DPI is normally far higher than the image's PPI, and nothing is wrong when the two numbers differ.

When an unfamiliar resolution control appears, ask what it changes:

- **Pixel dimensions change:** you're resampling, adding or removing image data.
- **Inches change while pixels stay fixed:** you're only changing the density the file claims, and so its print size.
- **Ink output or quality changes:** you're in the printer driver, which controls how the printer reproduces the file.

Preview shows the difference plainly. In Tools > Adjust Size, with Resample image unchecked, changing Resolution changes the width and height in inches and leaves the pixels alone. With it checked, the pixel count changes instead.

If a print looks soft, check the source first: focus, motion blur, how hard you cropped, and the size you printed at. A higher driver quality setting can reproduce a file more carefully, but it can't turn an out-of-focus photograph into a detailed one. Only once the file is sound do paper, driver settings and output sharpening become the place to look.

## How Does Viewing Distance Change the Target?

There's no universal pass mark. Someone holding a photo book can see detail that a person looking at wall art from across a room can't resolve, so the density a print needs falls as the viewing distance grows. Scanning guides, such as the [image-research guide hosted by Colorado College](https://www.coloradocollege.edu/academics/dept/art/images/Image-Research_VRC-23.pdf) for images taken from books and magazines, face the same question from the other side: how many pixels the use actually needs.

The middle column below is plain geometry. It gives the density at which neighboring pixels sit one arcminute apart at that distance, the detail limit usually quoted for 20/20 vision (PPI ≈ 3,438 ÷ distance in inches). Many people see finer detail than that, and viewers step closer to prints they like, so the starting points sit above it.

| Viewing situation | Distance | 20/20 detail limit | Starting point |
| --- | --- | --- | --- |
| Photo book, print held in the hand | 10–12 in (25–30 cm) | About 290–340 PPI | 300 PPI |
| Print on a desk, reading distance | 18 in (46 cm) | About 190 PPI | 200–300 PPI |
| Framed print seen across a table | 24 in (61 cm) | About 145 PPI | 150–200 PPI |
| Wall print seen from the room | 5 ft (1.5 m) | About 57 PPI | 100–150 PPI |
| Poster or banner seen from afar | 10 ft (3 m) | About 29 PPI | Under 100 PPI, confirmed with a test print |

So 300 PPI earns its reputation for anything people will pick up, and a 24-megapixel file printed 30 × 20 inches at 200 PPI holds up on a wall. Choose the density for the way people will actually see the print, not the closest anyone could get to it.

### Use a proof to settle borderline cases

Subject matters too. Fine foliage, architectural lines and lettering show weaknesses sooner than smooth skies or a softly focused portrait, and paper texture changes what you notice. Print a representative crop at the final scale, look at it from the expected distance, then move closer and decide whether any softness would bother the person it's for.

## What If a Photo Falls Short of 300 PPI?

Typing a higher number into an export box can hide the real decision. With resampling off, a new PPI value just shrinks the intended print size. With it on, the software invents pixels to fill the size you asked for.

Publisher guidance for book authors, such as [Oxford University Press's artwork guidance](https://academic.oup.com/pages/for-authors/books/the-book-publishing-process/writing-and-content-preparation/artwork-and-figures), is written around the same problem: resolution only means something at the size the image will be reproduced. The arithmetic is simple. Print the same pixels at twice the width and height and the density halves, so a file at 300 PPI on 8 × 10 is at 150 PPI on 16 × 20. Interpolation can fill the larger grid with estimated pixels, but it doesn't recover detail the camera never recorded.

What to do when the pixels fall short:

| Situation | Best action | Watch for |
| --- | --- | --- |
| Sharp source, print held in the hand | Try a modest enlargement and approve a proof | Interpolation softening along edges |
| Large print seen from a distance | Lower the target PPI to match the viewing distance | Confirm where the print will hang before accepting a low figure |
| Fine text, foliage or hard-edged graphics | Keep the print smaller rather than enlarging | Artifacts appear sooner in these subjects |
| Tight crop on a small file | Print smaller or keep more of the original frame | Cropping lowers the effective PPI at a fixed print size |
| Enlargement well beyond 2× | Reshoot, or choose a smaller size | Denoising and sharpening cannot replace missing detail |

Inspect an enlarged file at 100% to find artifacts such as mushy eyelashes, stair-stepped lettering or foliage that turns to texture, but judge print suitability from a physical proof, not a magnified screen. Apply noise reduction conservatively before the resize and sharpen for the output afterward. The guide to [resizing an image without losing quality](https://revelraw.com/blog/how-to-resize-an-image-without-losing-quality.md) covers resamplers and when an enlargement is worth trying.

## How Do You Set Up a Print Export?

1. **Write down the image size in inches.** Separate the photograph's printed area from the paper, the mat opening or the page, and decide whether you're fitting the whole frame or cropping to fill.
2. **Choose the PPI for the viewing distance.** 300 for prints held in the hand; lower for wall art, using the table above.
3. **Calculate the pixels you need.** Multiply each dimension in inches by that PPI and compare the result with the edited photograph's actual pixel width and height.
4. **Resolve any shortfall on purpose.** Print smaller, loosen the crop, test a modest enlargement, or accept a lower PPI for distant viewing.
5. **Match the export to the destination.** Use the format and color space your lab or printing workflow asks for, check the output dimensions, and make sure the print dialog won't scale the image.

### Keep color and resolution checks separate

Enough pixels won't prevent a color-management mismatch. Use the profile the destination asks for rather than assuming every lab wants the same color space; the guide to choosing a [colour profile for printing](https://revelraw.com/blog/color-profile-for-printing.md) covers that part of the handoff. If your project mixes photographs with illustrations, lettering or a page layout, Skup's guide to [prepare digital artwork for printing](https://skup.net/blog/printing-digital-artwork/) covers the whole piece rather than the photo alone.

### Approve a physical test

Open the exported file and check its dimensions before uploading or printing, so you know it's the final crop and that no size limit shrank it. Before a large or expensive run, make a test print, view it under light like its final display and from the distance people will normally stand. Note the crop, export settings, paper and print scaling with the file, and the next order is a repeat, not a guess.

## How Do You Export a Print File in RevelRaw?

We make RevelRaw, a native RAW editor for Macs with macOS 26 or later on Apple M1 or later. Its Print preset writes a full-size 16-bit TIFF in Adobe RGB, and like every RevelRaw export preset it keeps the shape of your crop and never enlarges a smaller image, so the pixel count you check after cropping is the count the lab receives. It also exports JPEG, PNG, 8-bit TIFF and HEIF in sRGB, Display P3 or Adobe RGB. A preset sets format, size and color space together; it doesn't choose the print size for you. RevelRaw doesn't print: send the TIFF to a lab, or print it from Preview, Photos or your printer maker's app.

AI scene detection ranks 50+ looks by category as a starting point, and processing happens on your Mac. Editing is free and the first full-quality export is included, with no account. Pro adds unlimited and batch export, as an auto-renewing subscription or a one-time lifetime purchase. [Get RevelRaw on the Mac App Store](https://apps.apple.com/app/apple-store/id6773942240?pt=120914369&ct=BlogOutrank&mt=8) (requires macOS 26 or later).

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## Frequently Asked Questions

### What does 300 PPI mean?

300 PPI means 300 image pixels along each inch of the print. Divide a photo's pixel width and height by 300 to get its print size in inches, or multiply the print size in inches by 300 to get the pixels you need. It describes density at a chosen size, not how many pixels the file holds.

### How big can I print a 24-megapixel photo?

A 6,000 × 4,000-pixel file prints at 20 × 13.3 inches at 300 PPI, before any crop. At 200 PPI the same pixels cover 30 × 20 inches, which is usually plenty for a wall print seen from a few feet away. Crop first and calculate from the pixels that remain.

### Is PPI the same as DPI?

No. PPI is the density of image pixels on the paper and is set by the file's pixel count and the print size. DPI is how densely the printer lays down ink dots, set in the printer driver. Many apps and labs say DPI when they mean PPI; a lab asking for a 300 dpi file wants 300 pixels per inch at the print size.

### Does changing the PPI value make a photo sharper?

No. Without resampling, typing a new PPI value only changes the print size the file claims; the pixels are the same. With resampling on, the software adds or removes pixels, and added pixels are estimated from their neighbors, so they cannot restore detail the camera never recorded.

### Can I export a print file from RevelRaw?

Yes. RevelRaw's Print preset writes a full-size 16-bit TIFF in Adobe RGB, and its exports never enlarge a smaller image, so the pixels you check after cropping are the pixels the lab gets. RevelRaw does not print; print from Preview, Photos or your printer maker's app, or send the file to a lab. It needs macOS 26 or later on an Apple M1 or later Mac.

* * *

Visit [RevelRaw](https://revelraw.com) to prepare your next print file on a Mac: check its cropped pixel dimensions, then choose an output size that fits how the photograph will be seen.