How do I calculate a 16:9 aspect ratio?

Divide width by height. For 16:9, height = width × 9 ÷ 16. Example: 1920 × 9 ÷ 16 = 1080. Use the calculator above to lock either side.

What is the difference between 16:9 and 16x9?

Nothing. 16:9 and 16x9 both mean sixteen units wide by nine units tall, the standard widescreen video frame.

What size should I use for 9:16 vertical video?

1080×1920 is the common export for TikTok, Reels, and Shorts. 720×1280 works when you need a lighter file.

Free tools

16:9 aspect ratio calculator

Use this 16:9 aspect ratio calculator to find the matching width or height for widescreen video. It also covers 9:16 vertical, 1:1 square, 4:3, and 21:9 so you can size canvases, exports, and thumbnails fast.

Pick a preset like 16:9 or 9:16, or type a custom ratio. Common 16x9 sizes include 1920x1080, 1280x720, and 3840x2160. Common 9:16 sizes include 1080x1920 and 720x1280.

The preview box updates as you type so you can see the frame shape before you open an editor. Everything runs in your browser; nothing is uploaded.

Recording product demos on Mac? Glisio exports widescreen, vertical, and square from one recording when you are ready to publish.

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Platform presets

Aspect ratio

Ratio widthRatio heightPixel widthPixel height

1920 × 1080px · 16:9

Formula: height = width × 9 ÷ 16

Common 16:9, 9:16, and 1:1 sizes

Quick reference for the sizes people look up most in a 16:9 aspect ratio calculator or 16x9 resolution tool.

16:9 Widescreen (YouTube, demos)

1920×1080
1280×720
3840×2160
2560×1440

9:16 Vertical (TikTok, Reels, Shorts)

1080×1920
720×1280
1080×2340

1:1 Square (feed posts)

1080×1080
1200×1200

Aspect ratio calculator FAQ

How do I calculate a 16:9 aspect ratio?: Divide width by height. For 16:9, height = width × 9 ÷ 16. Example: 1920 × 9 ÷ 16 = 1080. Use the calculator above to lock either side.
What is the difference between 16:9 and 16x9?: Nothing. 16:9 and 16x9 both mean sixteen units wide by nine units tall, the standard widescreen video frame.
What size should I use for 9:16 vertical video?: 1080×1920 is the common export for TikTok, Reels, and Shorts. 720×1280 works when you need a lighter file.