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Aspect Ratio Calculator

Resize images, video frames, and display banners while preserving the original aspect ratio.

Calculated Result
16:9

Aspect Ratio

Aspect Ratio

16:9

Scaled Dimensions

1280 × 720

Decimal Ratio

1.778

Calculation Breakdown

  1. Aspect Ratio SimplificationDivide 1920×1080 by GCD (120) = 16:9\text{Aspect} = 16 : 9
  2. Scaled Height for Target WidthNew Height = (1080 ÷ 1920) × 1280 = 720 pxh_2 = \frac{h_1}{w_1} \cdot w_2

Common Screen Aspect Ratios

Interactive visualization based on your current inputs

Ratio
0.00.61.21.72.31:1 (Square)4:3 (Classic)16:9 (HD)21:9 (Ultrawide)StandardDecimal Ratio

What Is the Aspect Ratio Calculator?

An Aspect Ratio Calculator determines proportional dimensional relationships.

How Does the Aspect Ratio Calculator Work?

Divides dimensions by GCD and computes scaled sizes.

Aspect Ratio Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

Ratio=Wgcd⁡(W,H):Hgcd⁡(W,H)\text{Ratio} = \frac{W}{\gcd(W,H)} : \frac{H}{\gcd(W,H)}

Greatest common divisor simplification.

How to Use the Aspect Ratio Calculator

  1. Enter width and height.

Step-by-Step Example Calculation

1920×1080 Scaled to Width 1280

Input Values:

width:1920
height:1080
targetWidth:1280
Worked Steps: Aspect ratio is 16:9. Scaled dimensions are 1280×720.

Understanding Your Result

Shows simplified ratio and scaled height.

Factors That Affect the Result

  • Screen resolution standards.

When Should You Use This Calculator?

  • Graphic design, photography, and video editing.

Assumptions & Limitations

  • Positive pixel counts.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Exact integer geometry.

Explore more tools and calculators in Math Calculators