Screen Size Calculator
Calculate actual dimensions from diagonal size and aspect ratio. Perfect for display planning and comparison.
Result
- Width
- -
- Height
- -
- Area
- -
Conversion Guide
Conversion
W
Width
Width = Diagonal × cos(arctan(H/W))
Calculate width using aspect ratio and diagonal
H
Height
Height = Diagonal × sin(arctan(H/W))
Calculate height using aspect ratio and diagonal
Step-by-Step Scenario
Example Scenario
Diagonal
24 inches
Aspect Ratio
16:9
1
Calculate Angle
- Angle = arctan(9/16) = 29.36°
Calculate angle from aspect ratio
2
Calculate Dimensions
- Width = 24 × cos(29.36°) = 20.9 inches
- Height = 24 × sin(29.36°) = 11.8 inches
Additional Examples
Ultrawide Monitor
Diagonal: 34 inches
Ratio: 21:9
Dimensions
31.3" × 13.4"
Classic Display
Diagonal: 20 inches
Ratio: 4:3
Dimensions
16.0" × 12.0"
Characteristics of Screen Size Calculation
Aspect Ratio Dependent
Same diagonal size with different aspect ratios results in different dimensions. Wider ratios have more width.
Multiple Formats
Shows dimensions in both inches and centimeters. Also calculates total screen area for comparison.
Display Planning
Essential for planning display setups, comparing screen sizes, and understanding actual viewing dimensions.
Precise Calculation
Uses trigonometric formulas for accurate dimension calculation. Results help understand actual screen space.
Important Notes
- Screen size is measured diagonally in inches. Actual width and height depend on the aspect ratio of the display.
- Same diagonal size with different aspect ratios results in different dimensions. 16:9 is wider, 4:3 is taller.
- The calculator uses trigonometric formulas to calculate width and height from diagonal and aspect ratio.
- Dimensions are shown in both inches and centimeters. 1 inch = 2.54 cm for conversion.
- Screen area is calculated to help compare total viewing space. Larger area means more screen real estate.
Frequently Asked Questions
Find answers to common questions about screen size calculation.