Photo Print Sizes in Pixels

What is a 4x6 photo in pixels?

A 4 x 6 inch photo is 1,200 x 1,800 pixels at 300 DPI, the print standard, or 600 x 900 pixels at 150 DPI. To size any photo yourself, multiply each inch dimension by your DPI. So 4 inches times 300 gives you 1,200 pixels, and 6 inches times 300 gives you 1,800. That's the whole trick, and it works for every size on this page.

Why 300? It's the number photo labs print at, and it's roughly the point where your eye stops seeing individual dots at normal reading distance. Go below it and a 4x6 starts looking soft. Go above it and you're feeding the printer pixels it can't use, so you're just making bigger files for no payoff. If you've ever wondered why a phone screenshot looks great on screen but mushy on paper, that's the gap between screen pixels and print pixels in action.

Photo print size to pixels (with megapixels needed)

Here's every common photo size with its pixel dimensions at 150 and 300 DPI, plus the megapixels you need for a sharp 300 DPI print. The megapixel column is the one most charts skip, and it's the number that actually tells you whether your camera or phone is up to the job.

Read the megapixel column like a shopping list. A 4x6 needs just 2.2 MP, so literally any phone from the last decade handles it. An 8x10 wants 7.2 MP, and a 16x20 jumps to 28.8 MP, which is more than most phones capture in a single shot. That doesn't mean you can't print big from a phone, it just means you'll be leaning on lower DPI or the printer's own upscaling, and the result won't be quite as crisp as a native high-resolution file.

One thing the table can't show is cropping. The moment you crop a wide shot down to a square or a tall portrait, you throw away pixels, so your real working resolution drops. If you know you'll crop, start with more megapixels than the chart asks for so you've got room to spare.

Aspect ratio is the other gotcha. A 4x6 is a 2:3 shape, but most phones shoot 4:3, so a straight phone photo doesn't fit a 4x6 frame without trimming the long edges. A 5x7 is 5:7, an 8x10 is 4:5, and none of those match each other exactly. That's why the same image can fill one size and leave white borders on another. Crop to the target ratio first, then check the pixel count against this chart, and you won't get a surprise at the print counter.

How big can you print your image?

Now flip the math around. Instead of starting with a print size, start with the file you already have and ask how large it'll go. Divide each pixel dimension by 300 for a sharp handheld print, or by 200 for wall art you'll view from a few feet back. Here's that worked out for the resolutions people ask about most.

Notice how a 1920 x 1080 screenshot, which looks enormous on a monitor, only prints sharp up to about 6.4 inches wide at 300 DPI. That's a common surprise. Screens pack pixels loosely, so what fills a 27-inch display won't fill a sheet of paper. If you've got a 24 MP camera file, though, you're sitting on a 20-inch wide print at full quality, and a poster-sized one if you ease off to 200 DPI. When you've landed on a size, the pixels to inches tool checks any exact number in a second.

What resolution do you need for a sharp print?

There isn't a single right answer, because the right DPI depends on how close someone stands. Closer viewing wants more pixels per inch. Here's the rule of thumb most print shops work to:

• 300 DPI for prints you'll hold in your hands, like a 4x6 or a photo book.
• 200 DPI for framed prints on a wall that people view from a few feet away.
• 150 DPI for large posters and banners you'll mostly see from across the room.

The further back the viewer, the more you can relax. A billboard might print at 20 DPI and still look flawless from the road, because nobody's pressing their nose against it. For everyday photos, though, don't drop below 200 if you can help it. When you're not sure which number fits your project, the DPI guide walks through it with examples for prints, screens, and signage.

It also helps to know what your source actually is. A camera RAW or a high-quality JPEG straight off the sensor carries its full pixel count, so it prints to the sizes in the reverse table above. A web download or a social media save is a different animal, because those get compressed and shrunk on upload. An image saved from Instagram, for instance, often comes back at roughly 1,080 pixels wide, which caps a sharp print at about 3.6 inches. So before you trust any resolution, check where the file came from, because the pixel count in the file properties is the only number that counts at the printer.

Frequently asked questions

What is a 4x6 photo in pixels?

A 4 x 6 inch photo is 1,200 x 1,800 pixels at 300 DPI, the print standard. At 150 DPI it's 600 x 900 pixels. Photo labs usually want 300 DPI because that's what keeps a print sharp in your hand.

How big can I print my image?

Divide each pixel dimension by 300 to find the largest sharp print in inches. A 3,000 pixel wide image prints crisply up to 10 inches wide at 300 DPI, and you'll stretch further at 200 DPI for wall art.

How many megapixels do I need to print 8x10?

An 8 x 10 inch print at 300 DPI is 2,400 x 3,000 pixels, which is 7.2 megapixels. Any modern camera or recent phone clears that easily, so you don't need pro gear for a sharp 8x10.

What DPI is best for printing photos?

300 DPI is the standard for photos you'll hold in your hands. Large prints hung on a wall and viewed from a few feet can drop to 150 to 200 DPI, and you won't see the difference.

Why does my photo look pixelated when printed?

It's almost always too few pixels for the size. If you blow a 1,000 pixel image up to 8 inches wide, that's only 125 DPI, so edges turn soft. Start with more pixels or print smaller and it'll look crisp.