How to Export Figures at 300 DPI
A step-by-step guide to exporting scientific figures at 300 DPI for journal submission. Nature, Cell, Science, and PNAS requirements.
Step 1: Check Your Figure Dimensions
Determine the final print size in inches or millimeters. A single-column Nature figure is 89 mm (3.5 inches) wide.
| Journal | Single Column | Pixels at 300 DPI |
|---|---|---|
| Nature | 89 mm (3.5") | 1050 px |
| Cell | 85 mm (3.35") | 1005 px |
| Science | 84 mm (3.3") | 990 px |
| PNAS | 88 mm (3.46") | 1038 px |
Step 2: Calculate Required Pixels
Multiply the width in inches by 300 DPI.
Formula: Width (inches) × 300 DPI = Required pixels
Example: 3.5 inches × 300 DPI = 1050 pixels wide
Example: 7.2 inches × 300 DPI = 2160 pixels wide (double column)
Step 3: Set the Correct DPI in Your Software
In your figure software, set the export DPI to 300 before exporting. Do not resize after export — this reduces quality.
Adobe Illustrator
File → Export → Export for Screens. Set resolution to 300 PPI. Or use File → Save As → TIFF with 300 DPI.
Photoshop
Image → Image Size. Set resolution to 300 pixels/inch. Ensure "Resample" is unchecked to maintain quality.
PowerPoint
File → Options → Advanced. Set "Default resolution" to 300 ppi. Then export as PNG or TIFF.
FigureGuild
Select your journal preset (Nature, Cell, Science, PNAS). One-click export at 300 DPI with exact dimensions.
Step 4: Choose the Right File Format
Raster (TIFF, PNG)
For photographs, microscopy, and complex images. TIFF is preferred for journals. PNG is good for web and transparency.
Vector (PDF, SVG, EPS)
For charts, graphs, and diagrams. Resolution-independent. PDF is preferred for journals. EPS is legacy but accepted.
Step 5: Verify the Exported File
Check the exported file’s DPI to confirm it is correct.
Mac (Preview)
Open image → Tools → Show Inspector. Check "Resolution" under the "General Info" tab.
Windows (Properties)
Right-click image → Properties → Details. Scroll to "Resolution" under the Image section.
Photoshop
Open image → Image → Image Size. Check "Resolution" in pixels/inch.
Step 6: Test Print Quality
Print the figure at the journal’s column width on a laser printer. Check for pixelation, blurry text, or compression artifacts.
Tip: If text looks blurry or pixelated, increase the DPI or use a vector format (PDF/SVG). Vector formats are resolution-independent and print sharply at any size.
Frequently Asked Questions
Why do journals require 300 DPI?
Journals require 300 DPI (dots per inch) to ensure print quality. At 300 DPI, images are sharp and clear when printed at the journal’s column width. Lower DPI (e.g., 96 DPI for screens) produces pixelated, blurry images in print.
What is DPI?
DPI (dots per inch) measures the number of pixels per inch in an image. A 1200 × 900 pixel image at 300 DPI is 4 × 3 inches. At 96 DPI, the same image is 12.5 × 9.4 inches — but with the same pixel count, it appears much larger but less sharp.
How do I check the DPI of an image?
In Photoshop: Image → Image Size. In GIMP: Image → Scale Image. In Preview (Mac): Tools → Show Inspector. In Windows: Right-click → Properties → Details. The DPI value is stored in the image metadata.
What if my figure is too small at 300 DPI?
If your figure is too small at 300 DPI, you need to increase the pixel dimensions. For example, a 89 mm single-column figure at 300 DPI needs to be 1052 pixels wide. If your image is only 500 pixels wide, you need to recreate it at higher resolution or scale it up (which may reduce quality).
Related Pages
Export at 300 DPI automatically
One-click journal presets. Exact dimensions, DPI, and format.
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