Photo Lab Standard • 4 × 6"
4 × 6 Inches in Pixels at 300 DPI Guide
Accurate pixel dimensions, 2:3 aspect ratio specs, and file requirements for high-definition 4 × 6 photo printing.
300 DPI (Commercial Print)1,200 × 1,800 px
96 DPI (Web Display)384 × 576 px
Aspect Ratio2:3 (Classic 35mm)
Total Megapixels2.16 MP
Interactive Live CalculatorPre-calibrated for 4 × 6" Photo (300 DPI)
DPI / PPI:
DPI
10.16 cm / 101.6 mm
Inches
Pixels
15.24 cm / 152.4 mm
Inches
Pixels
Display Precision:
Aspect Ratio Preview2:3
4" (1200px)6" (1800px)
1200 × 1800
2.16 MP • Portrait
Total Pixels
2,160,000
Megapixels
2.16 MP
Diagonal
7.21" / 2163.33px
Instant Developer ExportOne-click copy
Designer & Printmaker Preset Trays:
Overview & Resolution Specifications
The 4 × 6 inch format is the world standard for postcard prints and classic 35mm film photography with an authentic 2:3 aspect ratio. When printing at commercial photo lab quality (300 DPI), 4x6 inches in pixels equals exactly 1,200 × 1,800 pixels in portrait orientation, or 1,800 × 1,200 pixels in landscape orientation, with a total resolution of 2.16 megapixels.
Resolution Breakdown Across DPI Standards
| Standard | DPI | Pixel Dimensions | Megapixels | Common Use Case |
|---|---|---|---|---|
| Web Thumbnail | 72 DPI | 288 × 432 px | 0.12 MP | Social media previews |
| CSS Display | 96 DPI | 384 × 576 px | 0.22 MP | Portfolio web display |
| Standard Photo Lab | 300 DPI | 1,200 × 1,800 px | 2.16 MP | Walgreens, CVS, Shutterfly prints |
| Fine Art Giclée | 600 DPI | 2,400 × 3,600 px | 8.64 MP | Museum-grade archival cotton rag |
Calculation Formulas & Arithmetic
Width (300 DPI)
4 in × 300 DPI = 1,200 px
Multiply photo width by 300 pixels per inch.Height (300 DPI)
6 in × 300 DPI = 1,800 px
Multiply photo height by 300 pixels per inch.Frequently Asked Questions
How many pixels is a 4x6 photo at 300 DPI?▼
A 4x6 inch photo at 300 DPI measures exactly 1,200 × 1,800 pixels (portrait) or 1,800 × 1,200 pixels (landscape), totaling 2,160,000 pixels (2.16 MP).
Can I print a 4x6 photo with less than 1200x1800 pixels?▼
Yes, but if the resolution drops below 200 DPI (800 × 1200 px), you may notice graininess or blurriness upon close visual inspection.