Resolution lookup
1080×1350 Aspect Ratio: 4:5 Calculator
Find the 1080×1350 aspect ratio (4:5), see the reduction steps, and calculate resized dimensions without stretching.
1080 × 1350 is a portrait resolution with a 4:5 ratio. Its height is 1.25 times its width, and it contains 1,458,000 pixels.
Resize With This Ratio — 4:5
Change either side. The other updates proportionally. Results show whole pixels and the exact value before rounding.
Exact height: 1350 px
How the ratio is calculated
1080 ÷ 270 = 4; 1350 ÷ 270 = 5. Dividing both sides by the same value preserves the proportions and gives 4:5. 270 is the greatest common divisor of these dimensions.
Height = width × 5 ÷ 4. Width = height × 4 ÷ 5. These formulas change size without changing shape. They do not crop or pad the source.
4:5 portrait: scaling and framing
At 800 pixels wide, proportional resizing gives 1000 pixels high. A square crop at original width keeps 1080 × 1080 and removes 135 pixels from each vertical edge when centered. A 1080 × 1920 canvas has a different, taller 9:16 shape.
Ratio, resolution and units
A ratio compares width with height; it does not describe file size, compression or image quality. Enter both sides in pixels, inches or another matching unit. This calculator assumes square pixels for digital images. Video with a non-square pixel aspect ratio needs its display aspect ratio checked separately.
4:5 resizing examples
| Width | Exact height | Rounded height |
|---|---|---|
| 320 px | 400 px | 400 px |
| 640 px | 800 px | 800 px |
| 1080 px | 1350 px | 1350 px |
| 1920 px | 2400 px | 2400 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 4:5.