Video Aspect Ratio Guidesv1.0.0

Calculate video dimensions for any aspect ratio, explore common presets used in film, television, and social media, and find equivalent resolutions for your projects. Use either preset ratios or custom dimensions to plan video output for any platform or display.

• Select a Preset Ratio from the dropdown to populate the width and height fields with a standard resolution for that ratio. Presets are grouped by category: TV and Streaming, Cinema and Film, Ultrawide, Photography and Print, and Square and Vertical. Choose Custom to enter your own values.
• Enter the desired Width and Height in pixels. The tool accepts whole numbers, decimals (such as 1920.5), simple fractions (3/4), and mixed numbers (5 1/2).
• Use the Lock Dimension selector to choose whether width or height stays fixed when switching presets. Locking width makes the height adjust to match the selected ratio. Locking height makes the width adjust instead.
• Click Calculate or simply type in the input fields. Results refresh automatically after a short delay.
• Review results including the simplified ratio, decimal ratio, total pixel count, and orientation (landscape, portrait, or square).
• Open Settings and enable Show step-by-step calculation to see the formula derivation, including the greatest common divisor calculation used to simplify the ratio.
• Scroll to Common Resolutions to see well-known resolutions that share the same aspect ratio as the current input. These help when choosing a target resolution for encoding or export.
• Consult the Aspect Ratio Quick Reference table for a summary of common ratios across film, television, social media, photography, and specialty formats such as IMAX and Ultra Panavision 70.
• Click Reset to clear all saved state and return to the default 1920 by 1080 input.

Calculations follow the standard aspect ratio formula: divide width by height to obtain the decimal ratio, then divide both values by their greatest common divisor to express the ratio in simplified integer form. Total pixels equal width multiplied by height, and one megapixel equals one million pixels.

Plan aspect ratios across video production, graphic design, web development, and social media content creation. Choosing the correct ratio ensures content displays properly without unwanted cropping or letterboxing. The scenarios below show where this tool saves time and prevents costly export errors.

• YouTube Creators: Confirm that an editing timeline matches the standard 16:9 ratio at 1920 by 1080 or 3840 by 2160 before exporting, so the player does not show black bars.
• TikTok and Instagram Reels: Verify 9:16 vertical dimensions (1080 by 1920) for short-form content. Use the lock-width feature to calculate the exact height needed when a camera captures at a non-standard resolution.
• Instagram Posts and Portraits: Check 1:1 (1080 by 1080) for square posts or 4:5 (1080 by 1350) for portrait feed posts to maximize screen real estate in the mobile feed.
• Film and Cinema Production: Plan deliverables for theatrical projection in 2.39:1 anamorphic, 1.85:1 flat widescreen, 1.43:1 IMAX 70mm, or 1.90:1 IMAX Digital. Use the common resolutions list to pick the right render target.
• Web Designers: Determine hero image and background video dimensions that hold a consistent aspect ratio across responsive breakpoints.
• Game Developers: Calculate viewport dimensions for ultrawide 21:9 and super ultrawide 32:9 support, with 16:9 and 4:3 fallback modes for older displays.
• Digital Signage: Find the correct resolution for portrait-mode (9:16, 9:21) or square (1:1) digital displays used in retail, airports, and kiosks.
• Photographers: Convert between 3:2 DSLR output and 4:5 or 1:1 crops required for print and social sharing without guessing pixel counts.
• Educators and Presenters: Match slide decks and screen recordings to the target display ratio, whether 16:9 for modern projectors, 16:10 for laptop screens, or 4:3 for older equipment.