FrameJet
Start

Free calculator

Aspect ratio calculator for video

How much of your video stays when it has to fit another format? Enter width and height and see, for vertical, 4:5, landscape and square, the target size, the share of the picture that stays and the area that would otherwise be empty. For social media, shop videos, courses, webinars and displays.

Your source

Or pick an example

Quality of the target sizes

What happens in each format

Source: 1,920 × 1,080 pixels, aspect ratio 16:9

Vertical 9:16

Short videos, stories, portrait displays

Target size
1,080 × 1,920 pixels
If you crop
32% of the picture stays
Window of 607 × 1,080 pixels in the source
If you fit the whole picture
68% of the area stays empty

Picture is lost on the left and right.

Feed portrait 4:5

Feed, ads, product videos

Target size
1,080 × 1,350 pixels
If you crop
45% of the picture stays
Window of 864 × 1,080 pixels in the source
If you fit the whole picture
55% of the area stays empty

Picture is lost on the left and right.

Landscape 16:9

YouTube, webinars, courses, screens

Target size
1,920 × 1,080 pixels

Same shape: nothing is lost and no borders appear.

Square 1:1

LinkedIn, ads, shop

Target size
1,080 × 1,080 pixels
If you crop
56% of the picture stays
Window of 1,080 × 1,080 pixels in the source
If you fit the whole picture
44% of the area stays empty

Picture is lost on the left and right.

One video in, every format out – without black borders.

For each format, you decide which framing stays.

Start for free

How the calculator works

When you crop, the picture fills the target format completely. Whatever sticks out is cut off. The share is the ratio of the two aspect ratios: a 9:16 crop from 16:9 keeps 81 of 256 parts of the picture area, about 32 percent.

When you fit the whole picture, all of it stays visible and the rest of the target format is empty: bars or a blurred fill. It is the same fraction seen from the other side: what is cut off when you crop is empty area when you fit.

The target sizes are the same as in the export. The window is exact; the export rounds it to even pixel counts.

Frequently asked questions

What does the percentage mean when cropping?

It shows the share of your video's picture area that the target format keeps. At 32 percent, a good two thirds of the picture are cut off. Then check whether your subject fits the crop, or whether the whole picture with a fill is the better choice.

Why does area stay empty when I fit the whole picture?

Because source and target have different shapes. The whole picture only fits without a border when both have the same aspect ratio. Otherwise a strip stays free, which you can fill with black bars, a colour or a blurred copy of the picture.

Do the sizes match the export?

The target sizes do, they come from the same calculation as the export. The export rounds the crop window to even pixel counts, because common video formats do not allow odd sizes.

What size is my video?

In the file's properties, in your editing software or in the recording app. For phone videos with rotation, the size you see when playing counts: a vertical video is narrower than it is tall.

Aspect ratio calculator for video – FrameJet