Ratio guide
4:3 Aspect Ratio
A 4:3 frame is 4 units wide for every 3 units high. Exact sizes include 800 x 600, 1024 x 768, and 1600 x 1200 pixels. It is narrower than 3:2 and 16:9, so it keeps more vertical space for photos, presentations, and near-square displays.
Ratio-locked calculator
Calculate matching dimensions
Change either value. The other stays locked to 4:3.
Common 4:3 pixel dimensions
| Width | Height | Total pixels |
|---|---|---|
| 640 px | 480 px | 307,200 |
| 800 px | 600 px | 480,000 |
| 1,024 px | 768 px | 786,432 |
| 1,600 px | 1,200 px | 1,920,000 |
| 2,048 px | 1,536 px | 3,145,728 |
What 4:3 means
Four width units align with three height units, producing a decimal ratio of about 1.3333. Multiply width by 3/4 to calculate height.
How it compares
A 4:3 frame is narrower than 3:2 and keeps more content above and below at the same width. Compared with 1:1, it adds one-third more width.
Common uses
- Presentations, educational diagrams, older video, and images for near-square displays.
- Photos and illustrations that need a landscape shape without losing much vertical detail.
Fit, Crop, and Pad
Keep all contentCrop
Fill the framePad
Add background
Cropping a 16:9 image to 4:3 removes content from both sides. Fit keeps the full widescreen image and leaves space above and below. Pad fills that space with a background. Check people or text near the edges before cropping.
Try this ratio with your imageFormula
Calculate the missing side
height = width × 3 / 4width = height × 4 / 3
For a 1600 px width, height = 1600 x 3 / 4 = 1200 px. For a 900 px height, width = 900 x 4 / 3 = 1200 px.
Frequently asked questions
Which resolutions are 4:3?
640 x 480, 800 x 600, 1024 x 768, and 1600 x 1200 pixels are all exact 4:3 resolutions.
Is 4:3 the same as 1.33:1?
Approximately. Four divided by three is 1.3333 recurring, commonly shortened to 1.33:1 for display.
How does 4:3 differ from 16:9?
At the same height, 4:3 is narrower. To convert 16:9 to 4:3, crop the sides, add padding, or reframe the image.