4 5 Ratio in Pixels Explained with Examples and Uses
Learn what the 4:5 ratio in pixels means, how to calculate dimensions, and optimize images for platforms like Instagram, Pinterest, and Facebook.
Understanding the 4:5 Ratio in Pixels
The 4:5 ratio in px refers to the proportional relationship between an image’s width and height—where the width measures 4 units for every 5 units of height. This aspect ratio is widely used in digital media because it produces a vertical format that is eye-catching while maintaining balance in composition.
If the height is 1000 pixels, the width should be exactly 800 pixels to preserve the 4:5 ratio. Unlike arbitrary sizes, aspect ratios describe the shape of an image rather than its absolute pixel dimensions. For example, 800×1000, 1080×1350, and 1600×2000 all share a 4:5 relationship, even though the pixel counts differ.
---
Why the 4:5 Ratio Is Popular on Social Media
The 4:5 aspect ratio has become a go-to format for vertical media on platforms such as:
- Instagram Feed: Supports 4:5 vertical posts that occupy more vertical space than square images, increasing the chance of engagement.
- Pinterest Pins: Optimized for tall images, often improving click-through rates.
- Facebook & LinkedIn posts: Mobile-friendly vertical images perform well in feed previews.
In mobile-first design, slightly taller-than-wide formats create stronger impact, drawing the viewer’s eye as they scroll.
---
Calculating Pixel Dimensions for a 4:5 Ratio
To find the exact pixels for a 4:5 ratio, apply these formulas:
Height = (Width × 5) / 4
Width = (Height × 4) / 5Common pixel dimensions for 4:5 images include:
| Width (px) | Height (px) | Use Case |
|---|---|---|
| 800 | 1000 | General web images |
| 1080 | 1350 | Instagram Feed (optimal) |
| 1200 | 1500 | High-quality blog posts |
| 1600 | 2000 | Large print or retina displays |
---
Choosing the Right Resolution for Different Platforms
Selecting the correct resolution ensures your 4:5 images look crisp across devices:
- Instagram: 1080 × 1350 px (max feed resolution in 4:5)
- Pinterest: Minimum 1000 px height; ideally 1000 × 1250 or higher in proportion.
- Facebook: Larger uploads are supported, but 1080 × 1350 px is safe.
- High-DPI Screens: Double dimensions (e.g., 2160 × 2700 px) for retina sharpness.
No matter the platform, always preserve the 4:5 ratio and adjust only pixel density.
---
Aspect Ratio vs Resolution: The Key Distinction
It’s essential to distinguish:
- Aspect Ratio: The proportion (4:5, 16:9, etc.).
- Resolution: The pixel count (width × height).
Two images can have the same ratio but different resolutions:
- Image A: 800 × 1000
- Image B: 1600 × 2000
Both maintain 4:5 proportions, but Image B has four times the pixels.
---
Resizing Images to 4:5 Without Distortion
When resizing, maintain proportional scaling to avoid stretching. Popular tools include:
- Adobe Photoshop
- GIMP (Free)
- Canva
- Figma
- Online ratio calculators
Pro tip: In most editors, enable “Constrain Proportions” or “Lock Aspect Ratio”.
---
Cropping Techniques to Preserve Quality and Composition
If an image starts in a different aspect ratio, smart cropping is essential:
- Set fixed crop ratio: 4:5 in your tool before selecting the crop area.
- Keep the subject visible: Position key elements for balance.
- Watch the edges: Avoid cutting off vital content.
- Check headroom in portraits: Leave space above the subject’s head.
In Photoshop, for example:
Select Crop Tool > Set Ratio (4:5) > Adjust Frame > Apply---
Best Practices for Exporting 4:5 Ratio Images
For professional results:
- JPEG for photos; PNG for graphics with transparency.
- Export in sRGB for consistent colors online.
- Compress with tools like TinyJPG or ImageOptim to reduce file size.
- Preview across mobile and desktop for responsive fit.
---
Common Mistakes to Avoid With 4:5 Images
Watch out for:
- Using the wrong ratio—can result in auto-cropping.
- Too-low resolution—leads to pixelation on large or retina displays.
- Excessive compression—causes blurry details.
- Ignoring safe zones—text or graphics might be cut off in feeds.
- Not testing previews—risk of poor composition in final view.
---
Final Checklist Before Uploading 4:5 Ratio Images
- Ratio is exactly 4:5.
- Resolution meets platform guidelines.
- Correct format (JPEG/PNG/WebP).
- File size is optimized.
- sRGB profile applied.
- Mobile and desktop previews checked.
- Composition preserved during crop.
---
Summary
Mastering the 4:5 ratio in px gives your visuals a mobile-friendly, attention-grabbing format suitable for Instagram, Pinterest, blogs, and beyond. By using correct calculations, appropriate resolutions, and mindful cropping, you ensure images retain sharpness and balance across devices.
Apply these formatting and optimization tips to make your content stand out—and start testing 4:5 images in your next campaign for improved online engagement.
