Print size · Metric

20×30 cm print size

Exactly how many pixels a 20×30 cm print needs — and how much your camera's frame gets cropped.

8.4 MP
Needed at 300 DPI
3.7 MP
Needed at 200 DPI
30.0×20.0 cm
Size in cm
1.50:1
Aspect ratio
21 in
Typical viewing distance

Pixels needed for a 20×30 cm print#

At normal viewing distance (≈1.5× the diagonal, 0.5 m) about 200 DPI is indistinguishable from 300 DPI for most viewers.

ResolutionQualityPixel dimensionsMegapixels
360 DPIExceptional (close inspection)4,252 × 2,833 px12.0 MP
300 DPIPhoto-lab standard3,543 × 2,361 px8.4 MP
240 DPIFine-art inkjet2,834 × 1,889 px5.4 MP
200 DPILarge wall print2,362 × 1,574 px3.7 MP
150 DPIPoster, viewed from 1 m+1,772 × 1,180 px2.1 MP
100 DPIBillboard / banner1,181 × 787 px0.9 MP

Cropping from your camera#

Camera aspect ratioWhat happensImage kept
3:2 (full frame, APS-C)No crop needed100%
4:3 (MFT, phones)Crop the short side89%
16:9Crop the long side84%
1:1Crop the short side67%
Maximum print size—
In centimetres—
Megapixels · aspect ratio—

Will my camera be enough?#

A 24 MP camera (6000 × 4000 px) prints 508 DPI on the long side at 20×30 cm — more than enough. A 12 MP phone (4032 × 3024) gives 341 DPI. See the 8 megapixel guide.

3:2 metric print.

Other print sizes#

Wallet (2.5×3.5 in)3.5×5 in4×6 in5×5 in5×7 in6×8 in8×8 in8×10 in8.5×11 in (US Letter)8×12 in10×10 in11×14 in12×12 in11×17 in (Tabloid)12×16 in12×18 in13×19 in (Super B / A3+)16×20 in16×24 in18×24 in20×24 in20×30 in24×30 in24×36 in30×40 in40×60 inA6 (105×148 mm)A5 (148×210 mm)A4 (210×297 mm)A3 (297×420 mm)A3+ (329×483 mm)A2 (420×594 mm)A1 (594×841 mm)A0 (841×1189 mm)10×15 cm13×18 cm30×40 cm30×45 cm40×60 cm50×70 cm60×90 cm

Frequently asked questions#

How many megapixels do I need for a 20×30 cm print?

8.4 MP for 300 DPI photo-lab quality, 3.7 MP at 200 DPI, and 2.1 MP at 150 DPI.

What resolution is 20×30 cm at 300 DPI?

3,543 × 2,361 pixels.

Last updated October 03, 2026 · How we calculate · Sources