Aspect Ratio & Screen Size Calculator | Precision Display Tools

Calculate aspect ratios, pixel dimensions, and physical screen footprints with surgical precision. Built for video editors, UI designers, and hardware enthusiasts.

⚡️ What This Tool Does

Stop guessing at pixel math. This utility uses a Greatest Common Divisor (GCD) algorithm to normalize resolutions and map physical dimensions to screen real estate.

• Simplify Ratios: Input any resolution (e.g., 3840 x 2160) to find its base ratio (16:9).
• Scale Pixels: Lock your target ratio to calculate the required height for any width instantly.
• Measure Physical Footprint: Input a diagonal size to get the exact width and height of a panel in centimeters or inches.
• Reference Industry Standards: Compare common formats like UHD, WQHD, and DCI 4K at a glance.

🧐 FAQ

Does the calculator support decimal ratios? Yes. The engine handles floating-point numbers for both ratio inputs and diagonal measurements.

Does the diagonal calculation include the monitor bezel? No. These results represent the viewable area. If you are measuring for desk clearance, add 1–2 inches to account for the physical frame and stand.

What is the difference between 4K and UHD? "True 4K" (DCI) is 4096 x 2160, while "UHD" (Consumer 4K) is 3840 x 2160. This tool calculates both—simply toggle your pixel dimensions to see the difference in ratio.

📚 The "16:9" Backstory

The 16:9 aspect ratio became the global standard because it is the geometric mean of 4:3 (legacy TV) and 2.35:1 (cinema). It was engineered as a mathematical compromise to minimize "letterboxing" and "pillarboxing" when viewing content from both worlds.