The Aspect Ratio Calculator helps users determine the proportional relationship between width and height for images and screens. It's especially useful for designers, video editors, photographers and anyone needing to maintain consistent visual proportions without guessing or trial and error.
Pixels → Aspect Ratio: enter the width and height in pixels, optionally apply a scaling factor. The tool calculates the nearest standard aspect ratio along with the exact ratio, decimal value, orientation and pixel area. This is perfect for quickly determining how your image dimensions correspond to common aspect ratios like 16:9, 4:3, or 1:1.
Aspect Ratio → Pixels: select a standard aspect ratio from the provided options, enter the desired width in pixels, and optionally apply a scaling factor. The tool will instantly calculate the corresponding height to maintain the selected aspect ratio, making it easy to resize graphics or design layouts that stay perfectly proportional!
With my width and height, I'm probably a 16:9...short and fat. Not a good ratio in any aspect...if you need me, I'll be in the corner crying and eating lucky charms with cool whip.
Be sure to check out the Image Converter next!
| Ratio | Decimal | Used For | Examples |
|---|---|---|---|
| 16:9 | 1.78 | Most common widescreen | 1080p, 4K, monitors |
| 4:3 | 1.33 | Old monitors, retro content | CRT displays, older cameras |
| 1:1 | 1.00 | Perfect square | Icons, profile photos |
| 21:9 | 2.33 | Ultra-wide cinematic | Cinema, ultrawide monitors |
| 3:2 | 1.5 | Photography | DSLR images |
| 9:16 | 0.56 | Vertical video | TikTok, Reels, Shorts |
Aspect Ratio Reference Data
1. 16:9 (Widescreen)
Description: Most common display aspect ratio for monitors, TVs, streaming, and gaming.
Common Resolutions:
1280×720 (HD)
1600×900 (HD+)
1920×1080 (Full HD)
2560×1440 (QHD)
3840×2160 (4K UHD)
7680×4320 (8K UHD)
2. 4:3 (Standard)
Description: Older monitors, retro games, legacy office applications.
Common Resolutions:
640×480 (VGA)
800×600 (SVGA)
1024×768 (XGA)
3. 21:9 (Ultrawide)
Description: Ultrawide monitors for gaming, productivity, cinematic viewing.
Common Resolutions:
2560×1080
3440×1440
5120×2160 (Dual-QHD)
4. 1:1 (Square)
Description: Icons, thumbnails, app UI, avatars, social media posts.
Common Resolutions:
256×256
512×512
1024×1024
5. 3:2
Description: Popular for photography and Surface devices.
Common Resolutions:
2160×1440
3000×2000
6. 2.39:1 (CinemaScope)
Description: Movie and cinematic widescreen format.
Common Resolutions:
1920×804
3840×1608
Pixel Density & Display Terms
DPI (Dots Per Inch):
Used for printing, affects print sharpness.
PPI (Pixels Per Inch):
Screen pixel density, higher = sharper image.
Retina / HiDPI:
Displays with pixel density high enough to hide individual pixels.
Common Screen Resolutions
Standard HD Formats:
1280×720 (720p)
1920×1080 (1080p)
2560×1440 (1440p)
3840×2160 (4K)
7680×4320 (8K)
Mobile Resolutions:
750×1334 (iPhone)
1080×2340 (Common Android)
1440×3040 (High-end Android)
Tablet Resolutions:
1536×2048 (iPad Standard)
1668×2388 (iPad Pro 11")
2048×2732 (iPad Pro 12.9")
Aspect Ratio Conversion Notes
Converting Between Ratios:
Height = Width / Ratio
Width = Height × Ratio
Best Quality Source Formats:
PNG (lossless, transparency)
SVG (infinite scaling)
WebP (high quality, small size)
Avoid:
JPEG (blurred edges, no transparency)
GIF (low color depth)
General Advice:
Use the highest resolution available.
Avoid upscaling small images.
Maintain aspect ratio to prevent distortion.
Standard Pixel Dimensions by Ratio
16:9 Examples:
1280×720
1600×900
1920×1080
2560×1440
3840×2160
4:3 Examples:
640×480
800×600
1024×768
21:9 Examples:
2560×1080
3440×1440
1:1 Examples:
128×128
256×256
512×512
Other Useful Notes for Aspect Ratios
Best Source Image Orientation:
Square or widescreen images provide the most flexibility.
Transparency Support:
Supported: PNG, WebP, SVG
Not supported: JPEG, BMP
Scaling Tips:
Downscaling keeps quality.
Upscaling reduces sharpness.
SVG is best for generating multiple pixel sizes.