Aspect RatioCalculator

Calculate dimensions when changing aspect ratios while maintaining proper proportions. Built-in preset resolution library with real-time calculations for professional workflows.

Input & Output Value Types

I
Input Value Types

Source Resolution

Resolution enum or custom values

Preset options:
  • • 4K DCI (4096×2160)
  • • 4K Scope (4096×1716)
  • • 4K Flat (3996×2160)
  • • 4K UHD (3840×2160)
  • • 2K DCI (2048×1080)
  • • 2K Scope (2048×858)
  • • 2K Flat (1998×1080)
  • • 2K HD (1920×1080)
Custom input:Width (String) + Height (String)

Target Aspect Ratio

StandardRatio enum or custom values

Preset options:
  • • 2.39:1 (Scope)
  • • 2.35:1 (Cinemascope)
  • • 1.85:1 (Flat)
  • • 1.78:1 (16:9)
  • • 1.66:1 (European)
  • • 1.33:1 (4:3)
Custom input:Width ratio (String) + Height ratio (String)

O
Output Value Types

New Dimensions

Calculated resolution maintaining aspect ratio

  • • Example: "1920 × 1080"
  • • Precise integer calculations
  • • Maintains proportional accuracy

Crop/Letterbox Information

Format transformation details

  • • Crop dimensions when needed
  • • Letterbox/pillarbox calculations
  • • Pixel-accurate positioning
Cinema Scope Conversion
1920 × 803
2.39:1 from 16:9 source

Professional Calculator in Your Pocket

Get instant, frame-accurate aspect ratio calculations with our native app. Designed specifically for filmmakers, video editors, and content creators.

Preset resolution library with common video formats
Crop & letterbox support for format transformations
Real-time calculation as you adjust inputs
Custom input options for specialized workflows
Download AppSee Features

Lightning Fast

Get instant calculations without waiting for web pages to load

2.39:1
CinemaScope Format

Everything You Need for Professional Work

From indie films to Hollywood productions, our aspect ratio calculator handles every format and use case.

Preset Resolution Library

Built-in common video formats (4K DCI, 4K UHD, 1080p, etc.) with custom input options for specialized workflows.

Perfect for quick format selection

Crop & Letterbox Support

Handle different aspect ratio transformations while preventing distortion with intelligent cropping and letterboxing.

Maintains proper proportions

Real-time Calculation

Automatically calculates new dimensions as you adjust inputs with live updates for immediate feedback.

Instant results as you type

Professional Aspect Ratio Reference

RatioNameCommon UseExample Resolution
2.39:1CinemaScopeTheatrical releases, epic films4096×1716
1.85:1Flat / Academy FlatStandard cinema, most films1998×1080
16:9HD / WidescreenTV, streaming, YouTube1920×1080
21:9Ultra-wideCinematic content, gaming2560×1080
9:16Vertical / PortraitTikTok, Instagram Stories1080×1920
1:1SquareInstagram posts, profile pics1080×1080

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