Video Aspect Ratio Calculator

Broadcast and cinema framing calculator: anamorphic, DCI 4K, IMAX, and letterboxing.

5-SEC OUTCOME

Resolve broadcast, cinema, and anamorphic video dimensions with pixel-accurate letterbox/pillarbox padding.

⚡ 0.1ms•🔒 100% Local

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Broadcast and cinema framing calculator: anamorphic, DCI 4K, IMAX, and letterboxing.

0.1ms100% LocalO(1)

RAM-ONLY ENGINE•USER CONTENT UPLOADS: 0•LOCAL EXECUTION

NO CREDENTIALS REQUIRED

VERIFIABLE CLIENT-SIDE PRIVACY CONTRACT

TOOL INPUTS STAY IN YOUR BROWSER

Zero Sign-Up FrictionNo email, no phone verification, no password creation. Start working immediately.

Zero Cloud ExposureYour files, calculations, or tokens remain exclusively in your computer's active RAM.

Instant 0ms ResponsivenessNo AI queues, no rate-limiting, and no cloud processing delays.

HOW TO USE THE VIDEO ASPECT RATIO CALCULATOR// DIRECT WORKFLOW

GUIDE

Specify your sensor resolution or target delivery canvas.

Choose from industry-standard cinematic framing aspect ratios.

Calculate top and bottom letterbox matte pixel heights.

TECHNICAL SPECIFICATIONS & PERFORMANCE// ENGINE TELEMETRY

VERIFIED

EXECUTION SPEED:0.1ms (Instant local)

SECURITY LEVEL:100% Local

NATIVE SUBSYSTEM:O(1)

Supports DCI 4K (4096x2160), Scope (2.39:1), and Flat (1.85:1).

Essential for colorists and video editors applying matte bars.

Instant mathematical breakdown.

FREQUENTLY ASKED QUESTIONS// PRIVACY & PROTOCOL SPECS

FAQ

Modern widescreen cinema typically uses either 2.39:1 (anamorphic scope) or 1.85:1 (standard flat widescreen).

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