Video Aspect Ratio Calculator (2026) - 16:9, 9:16 Dimensions

One known side, one ratio, both dimensions

Editors ask for 1080 wide but need the matching height for 9:16. This page solves the other dimension instantly with rounded integer pixels.

Defaults: 16:9 preset, fix width, 1920 px → 1920 × 1080, 2.07 MP. Decimal ratio shows 1.7778 for 16:9.

Ratio width and height must be greater than 0. Known dimension must be greater than 0.

Presets for social and broadcast

16:9 landscape for YouTube Watch Page. 9:16 for Shorts, Reels, and TikTok. 4:3 for legacy slides. 21:9 for ultrawide b-roll plates.

After export, estimate Shorts ad earnings on the YouTube Shorts RPM Estimator and TikTok view pay on the TikTok Money Calculator.

Square 1:1 assets can feed the Instagram Grid Preview Splitter when you slice a grid post.

Copy dimensions into your NLE

Copy dimensions summary exports ratio, pixel width and height, and megapixels. Paste into a production brief or sequence preset dialog.

Custom ratio accepts any positive integers (2:1 cinematic, 4:5 Instagram portrait). Preset dropdown refills ratio fields when changed.

Switching fix width vs fix height recalculates on the same known value. Toggle when your template locks height instead of width.

Frequently Asked Questions (FAQ)

How do you calculate video dimensions from aspect ratio?

Fix width: height = width × ratio height ÷ ratio width. Fix height: width = height × ratio width ÷ ratio height. Default 16:9 with width 1920 → height 1080.

Which preset matches Shorts, Reels, and TikTok?

9:16 vertical. With width 1080 you get height 1920, the common vertical HD export. 16:9 is landscape YouTube. 1:1 is square feed.

What are megapixels on the results card?

Width × height ÷ 1,000,000, rounded to two decimals. 1920×1080 = 2.07 MP. Useful when comparing sensor crop vs export resolution.

Does the preview box match exact pixels?

The box is a visual ratio preview scaled to fit the card, not a pixel ruler. Use the numeric width and height outputs for export settings in Premiere, CapCut, or DaVinci.

Video Aspect Ratio Calculator