Tool4:3 Aspect Ratio Calculator
Enter any width or height and get the matching 4:3 dimension, with presets for classic display resolutions.
Ratio is locked to 4:3. Edit the width and the height updates automatically, or edit the height to solve for the width.
4:3 resolution chart
| Name | Resolution | Use |
|---|---|---|
| VGA | 640 × 480 | Legacy displays, webcams |
| SVGA | 800 × 600 | Old monitors, projectors |
| XGA | 1024 × 768 | Projectors, classic desktops |
| SXGA+ | 1400 × 1050 | Business laptops (older) |
| UXGA | 1600 × 1200 | High-res CRTs, medical displays |
| QXGA | 2048 × 1536 | iPad retina, photo work |
Where 4:3 is used
4:3 is the classic "fuller" shape from before widescreen took over. It survives today in tablets (iPads are 4:3), Micro Four Thirds and many smartphone cameras, document scanning, slide decks, projectors and retro gaming. Because it is taller relative to its width than 16:9, it shows more vertical content — handy for reading, forms and portrait-leaning photos.
The math behind 4:3
A 4:3 frame is 4 units wide for every 3 units tall. Height from a width is height = width × 3 ÷ 4; width from a height is width = height × 4 ÷ 3. A resolution is exactly 4:3 when both numbers reduce to 4 and 3 — 1600 and 1200 share a divisor of 400, giving 4:3.
Related calculators
- Aspect Ratio Calculator — any custom ratio
- 16:9 Aspect Ratio Calculator — widescreen video and monitors
- 21:9 Aspect Ratio Calculator — ultrawide monitors
- What Is My Screen Resolution — detect your display size
Frequently Asked Questions
What is the 4:3 aspect ratio in pixels?
Common 4:3 resolutions are 640×480 (VGA), 800×600 (SVGA), 1024×768 (XGA), 1600×1200 (UXGA) and 2048×1536 (QXGA, the classic iPad retina size). Any width divisible by 4 gives a whole-pixel 4:3 height.
How do I calculate a 4:3 height from a width?
Multiply the width by 3 and divide by 4. A width of 1024 gives 1024 × 3 ÷ 4 = 768, so 1024×768 is exactly 4:3. Enter any width above and the calculator returns the matching 4:3 height.
Is 1024×768 a 4:3 ratio?
Yes. 1024 and 768 both divide by 256, reducing to 4:3. It was the standard XGA desktop resolution for years and is still common on projectors and older displays.
What is 4:3 used for today?
Photography (Micro Four Thirds and many phone cameras shoot 4:3), iPads and other tablets, document and slide scanning, projectors, retro gaming and CRT-style content. It is taller than 16:9, so it fits more vertical detail on screen.