Aspect Ratio Calculator
Everyday & MiscAspect Ratio Calculator
Aspect Ratio Results
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Dimension Result
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Common Aspect Ratios
| Ratio | Decimal | Common Use | Example Resolutions |
|---|---|---|---|
| 1:1 | 1.00 | Square, Social media | 1080x1080, 1024x1024 |
| 4:3 | 1.33 | Classic TV, iPad | 1024x768, 2048x1536 |
| 3:2 | 1.50 | Photography, Surface | 2160x1440, 6000x4000 |
| 16:10 | 1.60 | Widescreen laptops | 1920x1200, 2560x1600 |
| 16:9 | 1.78 | HD Video, Modern TVs | 1920x1080, 3840x2160 |
| 21:9 | 2.33 | Ultrawide monitors | 2560x1080, 3440x1440 |
| 32:9 | 3.56 | Super ultrawide | 5120x1440, 3840x1080 |
| 9:16 | 0.56 | Vertical video, Stories | 1080x1920 |
How to Use This Calculator
How to Use the Aspect Ratio Calculator
The Aspect Ratio Calculator determines the aspect ratio of any image or screen, calculates missing dimensions to maintain proportions, and converts between standard ratios. It is essential for photographers, videographers, web designers, and anyone working with visual media.
Finding the Aspect Ratio
Enter the width and height of your image, video, or screen. The calculator computes the simplified ratio and decimal value. A 1920 × 1080 resolution has a 16:9 aspect ratio (1.778:1). A 4000 × 3000 photo has a 4:3 ratio (1.333:1).
Calculating Missing Dimensions
Enter one dimension and the desired aspect ratio to find the other dimension. If you need a 16:9 image that is 1200 pixels wide: height = 1200 × (9/16) = 675 pixels. This ensures your media maintains correct proportions when resized.
Common Aspect Ratios
16:9: Widescreen standard for TVs, monitors, and YouTube. 1920×1080, 2560×1440, 3840×2160.
4:3: Classic TV and computer monitor ratio. 1024×768, 1600×1200.
21:9: Ultrawide monitors and cinema. 2560×1080, 3440×1440.
1:1: Square, popular on Instagram. 1080×1080.
9:16: Vertical video for Stories, Reels, TikTok. 1080×1920.
3:2: DSLR camera photos. 6000×4000.
Social Media Requirements
Each platform has preferred aspect ratios: Instagram feed (1:1 or 4:5), Instagram Story (9:16), YouTube (16:9), Facebook cover (820×312 ≈ 2.63:1), Twitter header (1500×500 = 3:1), LinkedIn banner (1584×396 = 4:1). The calculator includes presets for common platforms.
Frequently Asked Questions
Q: How do I crop an image to a specific aspect ratio?
A: Calculate the target dimensions using this tool, then use your image editor crop tool set to that ratio. To crop a 4000×3000 (4:3) photo to 16:9, the height becomes 4000×(9/16) = 2250. You will lose 750 pixels of height, cropping equally from top and bottom for centered results.
Q: What happens if I resize without maintaining aspect ratio?
A: The image or video becomes distorted, stretched horizontally or vertically. People look wider or taller, circles become ovals, and text appears skewed. Always maintain aspect ratio when resizing unless intentional distortion is the creative goal.
Q: What aspect ratio is best for printing photos?
A: Common print sizes have different ratios: 4×6 (3:2), 5×7 (7:5), 8×10 (5:4), 11×14 (14:11). Most DSLR cameras shoot 3:2, which matches 4×6 prints perfectly. For 8×10 prints, slight cropping is needed. Know your intended print size before shooting for optimal composition.