Aspect Ratio Calculator

Convert between any aspect ratios with frame-accurate precision. Essential for filmmakers, video editors, and content creators working across different formats.

Input & Output Value Types

I
Input Value Types

Source Resolution

Resolution enum or custom values

Input resolution from preset options or custom dimensions

Target Aspect Ratio

StandardRatio enum or custom values

Target aspect ratio from preset options or custom ratios

O
Output Value Types

New Dimensions

Calculated resolution maintaining aspect ratio

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

Crop/Letterbox Information

Format transformation details

  • • Example: Crop dimensions when needed
  • • Example: Letterbox/pillarbox calculations
  • • Example: Pixel-accurate positioning
Example Result
1920 × 1080
Precise calculation

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

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

Professional Aspect Ratio Calculator Calculator in Your Pocket

Professional calculator app designed specifically for filmmakers. Twelve essential tools including speed percentage, timecode math, and aspect ratio calculations.

Frame-accurate calculations for aspect ratio calculator
Works completely offline
Instant results with no ads
Universal app - one purchase works on all your Apple devices
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Aspect Ratio Calculator
iOS
iPadOS
macOS