Quick answer: Use 300 DPI for photos and small prints viewed up close. Use 150 DPI for large posters (18×24 and up) viewed from 3+ feet. Use 72 DPI only for screen display — it will look pixelated when printed.
The four DPI tiers explained
Different printing contexts require different DPI levels. The right number depends on how closely viewers will look at the final print:
300
Print Quality
Photo prints (4×6 to 16×20)
Business cards, flyers
Framed art prints
Anything viewed under 2 feet
Professional / commercial printing
150
Good Quality
Posters 18×24 and larger
Home / Costco photo printing
Canvas prints
Viewed from 3+ feet
Acceptable for most casual uses
96
Low Quality
Large format banners
Trade show displays
Viewed from 6+ feet
Will look soft up close
Acceptable only at a distance
72
Screen Only
Website images
Social media graphics
Email images
Will look pixelated if printed
Not suitable for any physical print
DPI by print size: quick reference
Required pixel dimensions at each quality level for the most common print sizes.
Print Size
300 DPI (Print)
150 DPI (Good)
Recommended Minimum
4×6"
1200 × 1800 px
600 × 900 px
300 DPI (viewed close)
5×7"
1500 × 2100 px
750 × 1050 px
300 DPI
8×10"
2400 × 3000 px
1200 × 1500 px
300 DPI
11×14"
3300 × 4200 px
1650 × 2100 px
300 DPI
8.5×11" (Letter)
2550 × 3300 px
1275 × 1650 px
300 DPI
12×18"
3600 × 5400 px
1800 × 2700 px
200 DPI acceptable
18×24"
5400 × 7200 px
2700 × 3600 px
150 DPI acceptable
24×36"
7200 × 10800 px
3600 × 5400 px
100–150 DPI acceptable
A4 (8.3×11.7")
2481 × 3508 px
1240 × 1754 px
300 DPI
A3 (11.7×16.5")
3508 × 4961 px
1754 × 2480 px
200–300 DPI
A2 (16.5×23.4")
4961 × 7016 px
2480 × 3508 px
150–200 DPI
Why viewing distance changes everything
The human eye can resolve approximately 300 points per inch at a distance of about 10 inches (arm's length). At greater distances, the eye can no longer distinguish individual dots — which is why large format printing at 100 DPI looks perfectly sharp from across a room.
This is why:
A 4×6 photo you hold in your hand needs 300 DPI to look sharp
A 18×24 poster on the wall at arm's length is fine at 150 DPI
A 40×60 banner viewed from 10 feet looks sharp at just 30–50 DPI
Billboards seen from 100+ feet use 10–15 DPI and look perfectly sharp from the road
The practical implication: you don't always need 300 DPI. Use our calculator to determine if your image's actual DPI at the desired size will look good at your expected viewing distance.
Common DPI myths — debunked
✗ Myth
"It looks sharp on my screen, so it will print fine."
Computer screens display at 72–110 PPI (pixels per inch). Your image may look great on screen because the screen's own pixels are tiny. But when printed, the same image at 72 DPI has 4× fewer dots per inch than a 300 DPI print — and the pixelation becomes visible.
✓ Reality
To check if your image will print well, use our calculator. Enter your pixel dimensions and it will tell you exactly what DPI you'll get at each standard print size.
✗ Myth
"I can just upscale my image to 300 DPI in Photoshop."
Changing the DPI setting in an image editor without also increasing the pixel count doesn't add real detail — it just tells the printer how to interpret existing pixels. Upscaling (adding pixels) using AI tools like Lightroom Enhance or Topaz Gigapixel can help, but it cannot fully recover lost detail from a low-resolution original.
✓ Reality
DPI without pixel count is meaningless. What matters is the actual pixel dimensions of your image. A 4000×3000 pixel image has the same amount of data regardless of whether its DPI metadata says 72 or 300.
✗ Myth
"I need 600 DPI for the best possible print quality."
Human eyes can't distinguish detail beyond about 300 DPI at normal viewing distances. 600 DPI prints are indistinguishable from 300 DPI prints to the naked eye for photos and posters. 600 DPI is only relevant for very fine text, engineering drawings, or microscopic labels.
✓ Reality
300 DPI is the professional standard for photo and poster printing. 600 DPI produces a 4× larger file with no visible improvement for typical print uses.
Find out what DPI your image will achieve at any standard print size:
DPI tips for photographers and designers
📱
Check DPI before ordering
Use our calculator to verify your image has enough pixels before placing a print order. Discovering a DPI problem after paying is a frustrating (and expensive) surprise.
🎨
Save for print in sRGB
Most online printers handle sRGB to CMYK conversion automatically. Export in sRGB at 300 DPI for best compatibility with Printify, Printful, and major photo labs.
📏
Design at 300 DPI from the start
In Canva or Photoshop, set your document to 300 DPI before you start designing. It's much harder to increase DPI after the fact than to reduce it later.
🔍
Use AI upscaling as a rescue tool
If your image is slightly below 300 DPI, tools like Lightroom's Enhance Detail or Topaz Gigapixel AI can often recover 1.5–2× resolution with good results.
Frequently asked questions
300 DPI is the professional standard for photos and prints viewed up close. For large format prints (18×24 and larger) viewed from arm's length or farther, 150 DPI is generally acceptable and often indistinguishable from 300 DPI. 72 DPI is screen resolution and will look pixelated when printed.
200 DPI is acceptable for most casual printing and home photo printing. Professional print labs and close-up viewing (framed portraits, business cards) benefit from 300 DPI. For large format printing viewed from normal distance, 200 DPI is usually fine and most viewers cannot tell the difference from 300 DPI.
Less than for small prints. Large format prints like 24×36 and larger are typically viewed from 3+ feet away. At that distance, 100–150 DPI is often indistinguishable from 300 DPI. The rule of thumb: the farther the viewing distance, the lower the DPI you need. Billboard printing uses just 15–30 DPI — it looks sharp from a car because you're 50+ feet away.
DPI stands for "dots per inch" — it describes how many ink dots a printer places in one inch of output. In digital photography, the equivalent concept is PPI (pixels per inch) — how many pixels your image contains per inch at a given print size. For printing purposes, DPI and PPI are used interchangeably. What actually matters is your image's total pixel count, not the DPI metadata setting, since that can be changed without adding real detail.
300 DPI is the right choice for virtually all photo and poster printing. The human eye cannot distinguish individual dots at 300 DPI from a normal viewing distance — printing at 600 DPI will not look visibly better and requires 4× as many pixels. The only cases where 600 DPI matters are very fine text printing, engineering drawings, or scientific printing requiring microscopic detail.