Aspect Ratio Calculator
Solve ratios, scale dimensions, and compare formats — with CSS output and device references.
Solve: Find the 4th Value
Enter width and height to get the reduced ratio, then enter any one of the new dimensions to find the other.
Ratio
16:9
Decimal
1.7778
Degrees
29.4°
Find missing dimension (lock ratio 16:9)
CSS Output
Modern CSS (preferred)
aspect-ratio: 16 / 9;Padding-top hack (legacy)
padding-top: 56.2500%;Common Resolutions for 16:9
320×180
0.3K
640×360
0.6K
1280×720
1.3K
1920×1080
1.9K
2560×1440
2.6K
3840×2160
3.8K
7680×4320
7.7K
Matching Photo Print Sizes
No standard print size matches this ratio closely (within 5%).
Standard sizes: 4×6, 5×7, 4×5, 8×10, 11×14, 16×20, 20×30 inches
Visual Preview
1920×1080
Ratio 16:9 — 1.778:1
Device Reference
Click to apply
How to Use
- Solve: Enter W & H → get ratio and CSS. Enter new W or H → find missing value.
- Convert: Scale any image to a new size while keeping its ratio exact.
- Compare: See how two different ratios differ visually and numerically.
All processing runs in your browser — nothing is sent to a server.