Aspect Ratio Calculator
Calculate aspect ratio from any width and height. Find the perfect resolution for YouTube, TikTok, Instagram, Twitch, and more.
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Common resolutions for 16:9
Understanding Aspect Ratios
An aspect ratio describes the proportional relationship between a video or image's width and height. The most common aspect ratio for video is 16:9, used by YouTube, Twitch, and most modern displays. Vertical content on TikTok and Instagram Reels uses 9:16.
Choosing the correct aspect ratio ensures your content displays without black bars or cropping. Use our calculator above to find the right dimensions, or pick a platform preset to get started instantly.
Frequently Asked Questions
What aspect ratio is 1920x1080?
1920×1080 is a 16:9 aspect ratio, also known as Full HD or 1080p. This is the standard for YouTube, Twitch, and most TV content.
What is the best aspect ratio for YouTube?
YouTube uses 16:9 as its standard aspect ratio. The recommended resolution is 1920×1080 (1080p) or 3840×2160 (4K). YouTube Shorts use 9:16 (1080×1920).
What aspect ratio does TikTok use?
TikTok uses 9:16 (vertical video). The recommended resolution is 1080×1920 pixels. This is the same ratio used by Instagram Reels and YouTube Shorts.
How do I calculate aspect ratio?
Divide both the width and height by their greatest common divisor (GCD). For example, 1920÷120 = 16 and 1080÷120 = 9, giving you 16:9.