Use ratio before pixels
A ratio controls shape. Pixel dimensions control export size and sharpness. Start with the shape, then choose exact width and height.
Ratio calculator hub
Dedicated aspect ratio calculators
Choose a common ratio, enter width or height, and calculate matching dimensions for video, social media, website heroes, thumbnails, dashboards, and ultrawide layouts.
Calculator coverage
7
ratio calculators
6
common formats
Live
width/height math
Best workflow: choose the final placement first, then calculate matching dimensions before exporting or cropping assets.
Ratio pages
Pick a dedicated calculator
Each page includes a focused calculator, common export sizes, practical use cases, FAQs, and links back to related tools and guides.
Widescreen
16:9
16:9 Aspect Ratio Calculator
Calculate 16:9 dimensions for YouTube videos, widescreen banners, presentations, and HD/4K layouts.
1,920 × 1,080
Classic and photography
4:3
4:3 Aspect Ratio Calculator (and 3:4 Portrait)
Calculate 4:3 landscape or 3:4 portrait dimensions for photos, projectors, tablets, retro video, print, and crops.
1,600 × 1,200
Vertical video
9:16
9:16 Aspect Ratio Calculator
Calculate 9:16 dimensions for TikTok, Instagram Reels, YouTube Shorts, stories, and vertical mobile video.
1,080 × 1,920
Square
1:1
1:1 Aspect Ratio Calculator
Calculate square 1:1 dimensions for profile images, icons, product thumbnails, and social posts.
1,080 × 1,080
Portrait feed
4:5
4:5 Aspect Ratio Calculator
Calculate 4:5 dimensions for Instagram portrait posts, social feed creatives, ads, and vertical image crops.
1,080 × 1,350
Ultrawide
21:9
21:9 Aspect Ratio Calculator
Calculate 21:9 ultrawide dimensions for cinematic banners, ultrawide monitor screenshots, and hero layouts.
2,560 × 1,097
Super ultrawide
32:9
32:9 Aspect Ratio Calculator
Calculate 32:9 super ultrawide dimensions for dual-screen style dashboards, panoramic layouts, and wide monitor captures.
5,120 × 1,440
Avoid stretching assets
Change one dimension and calculate the other. Stretching both width and height manually can distort people, products, UI, and screenshots.
Create reusable templates
Save common sizes for 16:9, 9:16, 1:1, and 4:5 so your design and marketing exports stay consistent.
Guide collection
Related guides
Use these supporting guides to understand the tool result and next testing steps.
Related tools
Continue with another ScreenMetricLab utility.
Need more screen sizing help? Explore device viewport sizes, compare popular screens, or read our screen and viewport guides.