uplads.com

Ad Aspect Ratio Calculator & Checker

The free Facebook and Meta ads aspect ratio calculator and checker. Drop a creative or enter its pixel size to see which placements it clears - Feed, Stories, Reels, in-stream - or switch to the calculator to reduce any width x height to a clean ratio and solve the missing dimension. No signup, nothing uploaded.

Drop an image here, or click to choose

The image never leaves your browser - dimensions are read locally. Or type the size below.

Aspect ratio

4:5

0.8 : 1

Orientation

Portrait

1080 x 1350 px

Closest Meta ratio

4:5

Export 1080 x 1350

Where this fits in Meta

Facebook & Instagram FeedPerfect fit

4:5 is the ratio Meta recommends for Feed - the tallest it allows, so it takes the most screen real estate.

Recommended: 4:5 (1080 x 1350)

Stories & ReelsSupported

Vertical but not 9:16. It runs, but Meta adds background padding above and below. 9:16 removes the bars.

Recommended: 9:16 (1080 x 1920)

In-stream videoCropped / padded

Vertical creative in a landscape slot gets pillarboxed. Use a 16:9 or 1:1 cut for in-stream.

Recommended: 16:9 (1920 x 1080)

Name the file so it auto-groups at launch

Once a master file clears its ratio, the filename is what tells a bulk launcher which placement it belongs to. uplads reads tokens like 4x5 from the filename and merges the matching variants into one ad that serves the vertical cut in Stories/Reels and the default cut in Feed - no per-placement clicking.

spring_hook_a_4x5.jpg

How it works

How to use this aspect ratio checker

Two tabs: the Checker grades a real file against Meta placements, the Calculator does the pure math.

Drop a creative into the Checker and it reads the pixel size locally - nothing is uploaded. Know only the dimensions? Type width and height instead. It reduces them to a clean ratio and grades every major placement - Feed, Stories, Reels, in-stream - as a perfect fit, supported, or cropped / padded, with the exact size to re-export at.

Aspect ratio calculator: reduce a size or solve a dimension

The Calculator tab is pure arithmetic - no upload, no file needed.

Reduce a size divides any width × height by its greatest common divisor - 1920 × 1080 becomes 16:9, 1080 × 1350 becomes 4:5 - and names the closest ad ratio and how far off you are. Solve a dimension takes a target ratio and the one side you have and returns the other, so the export lands on 4:5 or 9:16 exactly. Need full pixel specs and file limits? The ad specs hub lists them, and the safe zone checker shows where the interface covers your creative.

What is an aspect ratio?

An aspect ratio is the relationship between width and height, written like 4:5 or 9:16- independent of pixel count, so 1080 × 1350 and 1600 × 2000 are both 4:5. Meta cares because every placement is a fixed shape: a Reel is a tall rectangle, a Feed slot a near-square. A ratio that doesn't match gets cropped or padded to fit - 1920 × 1080 is 16:9, and its vertical inverse 1080 × 1920 is 9:16.

Reference

The aspect ratios Meta actually uses

Only a handful matter in 2026. Design to these and the crop stays yours.

📱

4:5 - Feed

1080 × 1350. The tallest shape Feed allows, so it takes the most screen space - the recommended default for Facebook and Instagram Feed.

📲

9:16 - Stories & Reels

1080 × 1920. Full-screen vertical, edge to edge - the only ratio that fills these placements without bars.

⬛

1:1 - square

1080 × 1080. Displays uncropped in Feed and the right column. The safe travels-everywhere fallback.

🖥️

16:9 & 1.91:1 - landscape

1920 × 1080 for in-stream video; 1.91:1 (1200 × 628) for link and landscape image ads. Feed supports down to 1.91:1 wide.

What happens when the ratio doesn't match the placement

Meta never rejects a mismatched creative. It adjusts it - which is worse, because you stop deciding the crop.

⚡The one rule: Meta adjusts, you lose control

A 9:16 video forced into Feed is cropped to 4:5 and loses its top and bottom; a 1:1 square in Reels gets big background bars. The ad still spends - just on a worse cut of your creative. Checking the ratio before launch is the cheapest creative fix there is: a re-export, not a reshoot.

Can one creative cover every placement?

A single 1:1 square displays everywhere, which is why rushed launches default to it - but it's a compromise everywhere and ideal nowhere: shorter than 4:5 in Feed, letterboxed in Reels. Most performance teams settle on two exports per concept - a 4:5 master for Feed, a 9:16 for Stories and Reels - because those placements carry the spend. That's what multi-placement delivery is for: one ad, two ratios, the right one shown per placement.

Why ratio is really a creative-velocity problem

Checking one image is trivial; the cost shows up at volume. A weekly test of five concepts in a 4:5 and a 9:16 cut is ten files - each the right ratio, named so the launcher knows its placement, matched to its sibling. Get one wrong and a letterboxed ad turns up in reporting three days later.

uplads was built inside an Austrian performance-marketing agency where that grind was the Monday-morning tax. It reads the placement token in the filename - 4x5, 9x16, 1x1 - and merges the matching variants into one multi-placement ad: the vertical cut in Stories and Reels, the default in Feed, no per-placement clicking. Correct ratio in, correctly grouped ad out.

The workflow that keeps ratios clean at scale

Three steps, repeatable forever.

  1. 1

    Export at the placement ratio

    4:5 for Feed, 9:16 for Stories and Reels. Run each through the checker above so a wrong size never reaches a launch.

  2. 2

    Name with the placement token

    Generate names instead of typing them with the naming convention generator so the launcher can group them.

  3. 3

    Bulk-launch and let ratios collapse

    Drop the whole set into a bulk launch; matching ratios merge into one multi-placement ad each. Pair it with the UTM builder so sizing, grouping and tracking are decided once, not per ad.

Related media-buyer tools

Ad specs & validatorEvery placement's ratio, size and file limitsSafe-zone checkerSee where the UI covers your creativeNaming convention generatorToken-based names the launcher can groupUTM builderClean Meta URL params, ready for GA4

Frequently asked questions

What aspect ratio should I use for Facebook ads?
Use 4:5 (1080 x 1350) for Feed and 9:16 (1080 x 1920) for Stories and Reels. Those two cover the placements where most budget is spent. 1:1 (1080 x 1080) is a safe square fallback that displays uncropped in Feed. 4:5 is preferred over 1:1 for Feed because it is the tallest ratio Meta allows there, so it takes the most screen space on a phone.
What happens if my aspect ratio doesn't match the placement?
Meta does not reject the ad - it adjusts it. In Feed, anything taller than 4:5 is cropped to 4:5, and anything wider than 1.91:1 is cropped on the sides. In Stories and Reels, a non-9:16 creative gets background padding (letterbox bars) or, if it is landscape, large empty space. The ad still runs, but you lose control of the crop and usually screen real estate. Exporting at the placement's recommended ratio means you decide what stays in frame, not the algorithm.
Should I use 1:1 or 4:5 for Facebook feed ads?
4:5. Both are fully supported in Feed, but 4:5 is the tallest ratio Feed allows, so it occupies more vertical space on a mobile screen than a 1:1 square - more pixels means more attention. Use 1:1 only when the same asset also has to work in a square-only placement and you do not want to maintain two exports.
What is the best aspect ratio for Instagram Reels ads?
9:16 (1080 x 1920). Reels and Stories are full-screen vertical placements, and 9:16 fills the entire screen edge to edge. Any other ratio either gets letterboxed with background bars or, if it is square or landscape, leaves large empty regions that read as low-effort. Keep important elements away from the very top and bottom so captions and the profile bar do not cover them.
Can I use one creative for all Meta ad placements?
You can, but you usually shouldn't. A single 1:1 square will display everywhere, but it wastes space in Feed (where 4:5 is taller) and gets heavily letterboxed in Stories and Reels. The standard 2026 setup is two exports of each concept: a 4:5 for Feed and a 9:16 for Stories and Reels. The checker above tells you which placements a given file actually clears so you know whether you need the second export.
Does aspect ratio affect ad performance?
Indirectly but meaningfully. The ratio itself is not a ranking factor, but a creative that fills the screen in its placement gets more attention than the same creative shrunk into a letterboxed box, and attention drives the engagement signals that lower cost. Using the placement-correct ratio is one of the cheapest creative improvements available because it costs an export, not a reshoot.
Is there a free Facebook ads aspect ratio checker?
Yes. This one is free, needs no signup or email, and runs entirely in your browser - the image never leaves your device, only its pixel dimensions are read. Unlike a static spec table, it evaluates your actual file and tells you, per placement, whether it is a perfect fit, supported, or going to be cropped, plus the exact size to export at.

Right ratio in, correctly grouped ad out

Once your masters are the right size, naming and grouping them by hand across a 50-ad creative test is the slow part. uplads reads the placement token in each filename and ships one multi-placement ad per concept - the vertical cut in Stories and Reels, the default in Feed - in a single bulk launch. Save the hours a week that manual re-grouping eats.

Start free trialSee pricing