PrintPixelAspect Ratio Calculator & Visual Crop Tool
Upload an image to visually preview and reposition crop boundaries for any standard print frame (4×6, 5×7, 8×10, A4), or use the manual ratio calculator to simplify dimensions.
Sample 3:2 Photo (1200 × 800 px)
![Crop preview source](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="800" viewBox="0 0 1200 800"><defs><linearGradient id="g" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" stop-color="%232b3a67"/><stop offset="50%" stop-color="%23496a81"/><stop offset="100%" stop-color="%2366999b"/></linearGradient></defs><rect width="1200" height="800" fill="url(%23g)"/><circle cx="600" cy="400" r="180" fill="%23edc4b3" opacity="0.85"/><circle cx="600" cy="400" r="120" fill="%23e6b8a2" opacity="0.9"/><rect x="300" y="600" width="600" height="20" rx="10" fill="%23ffffff" opacity="0.4"/><text x="600" y="720" font-family="system-ui, sans-serif" font-size="28" font-weight="600" fill="%23ffffff" text-anchor="middle" opacity="0.8">Sample 3:2 Photo (1200 × 800 px)</text></svg>)
About 1 in every 4 pixels is cropped. Check subject placement to ensure edges are not cut off.
Ratios you'll recognize
1:1
Instagram posts, square frames, social avatars.
3:2
Standard DSLR/mirrorless sensors; 4×6, 12×18, 24×36 prints.
4:3
Micro Four Thirds & smartphone sensors; requires crop for 4×6.
5:4 / 7:5
8×10, 16×20 (5:4) and 5×7 (7:5) traditional frames.
Why aspect ratio matters when printing
Every standard frame size has a fixed aspect ratio. A 4×6 print is 3:2; a 5×7 print is 7:5; an 8×10 print is 5:4; and an A4 sheet is √2:1 (1:1.414). When your image ratio does not match the frame ratio, fitting the image without stretching means trimming parts of your composition.
The visual crop tool lets you see exactly which pixels are retained, how much image area is trimmed, and where to position the crop frame before you order prints.
Worked examples: How common prints crop
3:2 Camera Photo → 5×7 Print
A standard 24 MP camera photo at 6000 × 4000 pixels (3:2) printed as a 5×7 (7:5) requires cropping the long edge:
• Usable width = 4000 × (7 ÷ 5) = 5600 pixels.
• 400 horizontal pixels (6.7% of image area) are trimmed from the sides.
• Effective print resolution = 5600 ÷ 7 in = 800 PPI (Excellent quality).
3:2 Camera Photo → 8×10 Print
A 6000 × 4000 pixel (3:2) photo printed as an 8×10 (5:4) is significantly more square:
• Usable width = 4000 × (5 ÷ 4) = 5000 pixels.
• 1000 horizontal pixels (16.7% of image area) are trimmed.
• Effective print resolution = 5000 ÷ 10 in = 500 PPI (Excellent quality).
Frequently asked questions
What does aspect ratio mean?
Aspect ratio is the proportional relationship between an image's width and height, written as two numbers like 3:2, 4:3, or 5:4. It describes the geometric shape of the image — how wide it is relative to how tall — regardless of its physical size or total pixel count.
Why does my 4×6 photo crop when printed as a 5×7?
A 4×6 print has a 3:2 aspect ratio (1.50:1), which is the native shape of most DSLR and mirrorless camera sensors. A 5×7 print has a 7:5 ratio (1.40:1), which is slightly taller and more square. When fitting a 3:2 image onto a 5×7 frame without stretching, roughly 6.7% of the image's width must be cropped off.
Why does an 8×10 print crop 4:3 phone photos and 3:2 camera photos?
An 8×10 print has a 5:4 (1.25:1) aspect ratio. Because both 3:2 (1.50:1) and 4:3 (1.33:1) are wider than 5:4, fitting either photo into an 8×10 frame requires trimming the left and right edges. A 3:2 photo loses about 16.7% of its area, while a 4:3 photo loses about 6.3% of its width.
Why shouldn't I stretch the image to fit instead of cropping?
Stretching changes the physical proportions of subjects in the photo — faces and objects become noticeably wider or narrower than reality. Cropping trims peripheral pixels while preserving natural optical proportions.
Is my image uploaded to any server when using the visual crop tool?
No. All image decoding, aspect ratio analysis, visual crop rendering, and pixel calculations run 100% locally in your browser memory. Your image is never uploaded to any server.