4:5 Aspect Ratio Calculator
Calculate dimensions for 4:5 portrait format, the optimal size for Instagram posts and mobile ads.
Calculate dimensions for 4:5 portrait format, the optimal size for Instagram posts and mobile ads.
The 4:5 aspect ratio is Instagram's optimal portrait format, allowing photos to take up maximum vertical space in users' feeds without being cropped. This slightly tall portrait orientation (4 units wide by 5 units tall) has become essential for social media marketing, mobile advertising, and portrait photography.
For maximum visibility in the Instagram feed, use 1080 x 1350 pixels. This is the optimal 4:5 resolution that fills the most screen space on mobile devices, increasing engagement potential.
| Resolution | Name | Category | Megapixels |
|---|---|---|---|
| 1080x1350 | Instagram Post | Social | 1.5 MP |
| 1200x1500 | Pinterest Pin | Social | 1.8 MP |
| 2160x2700 | High-Res Instagram | Social | 5.8 MP |
| 720x900 | Mobile Ad Standard | Social | 0.6 MP |
| 1440x1800 | Facebook Portrait | Social | 2.6 MP |
| 2400x3000 | 8x10 Print @ 300dpi | 7.2 MP | |
| 3600x4500 | 12x15 Print @ 300dpi | 16.2 MP | |
| 4000x5000 | 16MP High-Res | Camera | 20.0 MP |
Maximizes vertical presence in Instagram feeds for better engagement
Optimal format for mobile-first ad campaigns on social platforms
Tall format that stands out in Pinterest's vertical feed layout
Standard portrait print size used by photographers
4:5 is the tallest aspect ratio Instagram allows in the main feed. It takes up more screen real estate than square (1:1) or landscape photos, making posts more visible and potentially increasing engagement.
Studies suggest 4:5 vertical images can get up to 1.5x more engagement than square images because they occupy more screen space and stop scrollers longer. However, content quality matters most.
Instagram recommends 1080x1350 pixels for 4:5 portrait posts. While Instagram compresses images, uploading at this resolution ensures the best quality after compression.
Yes! 4:5 and 8:10 are the same ratio (8:10 simplifies to 4:5). This means photos shot for Instagram's optimal size will also perfectly fit standard 8x10 inch print frames.
Converting 16:9 to 4:5 requires significant cropping from both sides, as 16:9 is very wide and 4:5 is tall. You'll lose about 64% of the width. Consider if the main subject will still be visible after cropping.