Aspect ratios
2:3 Aspect Ratio Calculator & Portrait Dimensions
Find 2:3 portrait dimensions, verify 512×768, and scale photos or print layouts while keeping the correct shape.
A 2:3 frame is two units wide and three units tall. Its height is 1.5 times its width. The 512 × 768 image in the calculator reduces exactly to 2:3 after dividing both dimensions by 256.
Resize With This Ratio — 2:3
Change either side. The other updates proportionally. Results show whole pixels and the exact value before rounding.
Exact height: 768 px
2:3 dimensions in pixels
There is no single pixel size for a 2:3 frame. These width × height pairs all simplify exactly to 2:3. Choose a size to open it in the full calculator.
| Width (px) | Height (px) | Calculate this size |
|---|---|---|
| 512 | 768 | 512 × 768 |
| 800 | 1200 | 800 × 1200 |
| 1080 | 1620 | 1080 × 1620 |
| 1200 | 1800 | 1200 × 1800 |
| 2000 | 3000 | 2000 × 3000 |
Use the resizing calculator above for a custom dimension. Changing both sides independently can distort the image; changing one side proportionally preserves the ratio.
How the ratio is calculated
512 ÷ 256 = 2; 768 ÷ 256 = 3. Dividing both sides by the same value preserves the proportions and gives 2:3. 256 is the greatest common divisor of these dimensions.
Height = width × 3 ÷ 2. Width = height × 2 ÷ 3. These formulas change size without changing shape. They do not crop or pad the source.
From a small image to a larger layout
512 × 768, 800 × 1200 and 2000 × 3000 all share this portrait shape. At 1000 pixels wide, a 2:3 output is 1500 pixels high. Enlarging a 512 × 768 source to that size increases its pixel dimensions but cannot reconstruct detail absent from the original.
A portrait print example
A 4 × 6 inch print is 2:3 when the shorter side is the width. At 300 pixels per inch, 1200 × 1800 is a matching digital size. If your original image is 4:5, it will need cropping or padding to fit this taller print frame without distortion.
Compared with a 9:16 frame
Both shapes are portrait, but 9:16 is narrower relative to its height. Cropping 800 × 1200 to 9:16 keeps 675 × 1200 and removes 62.5 pixels from each side before rounding. Do not treat all portrait presets as interchangeable.
2:3 resizing examples
| Width | Exact height | Rounded height |
|---|---|---|
| 320 px | 480 px | 480 px |
| 640 px | 960 px | 960 px |
| 1080 px | 1620 px | 1620 px |
| 1920 px | 2880 px | 2880 px |
Decimal heights are displayed to four decimal places. Rounding can change the final ratio slightly. For an exact integer result, use dimensions that are whole-number multiples of 2:3.