Enter screen diagonals and aspect ratios to calculate width, height, and area in inches, millimeters, and square centimeters. Compare two displays at their true proportions.
Screen A
Diagonal
16:9 aspect ratio
13.30 in
Width
294.4 mm
11.59 in
Height
165.6 mm
6.52 in
Area
487.6 cm²
75.6 in²
Screen B
Diagonal
16:10 aspect ratio
13.30 in
Width
286.5 mm
11.28 in
Height
179.0 mm
7.05 in
Area
512.9 cm²
79.5 in²
True-Ratio Screen Comparison
Screen AScreen B
Differences from Screen A to Screen B
Width difference-2.71%
Height difference+8.11%
Area difference+5.18%
Diagonal differenceSame
Frequently Asked Questions
The diagonal and aspect ratio form a right triangle. The calculator divides the diagonal by the square root of width-ratio squared plus height-ratio squared, then multiplies that unit length by each ratio number to get screen width and height.
No. Aspect ratio changes the shape. A 13.3-inch 16:10 screen is taller and has a slightly larger area than a 13.3-inch 16:9 screen because more of the diagonal is used for height and less is consumed by width.
No. Results describe the nominal active display rectangle. Bezel, cover glass, curves, camera cutouts, and device housing can make the physical product larger.
Common laptop, monitor, phone, and tablet ratios are built in: 16:9, 16:10, 3:2, 4:3, 21:9, and 32:9. Choose a preset or enter both screens to compare their true proportions and area.
