# Aspect ratio calculator: 16:9, 4:3, image resize

> Get the height for a width at 16:9, 4:3 or any aspect ratio, find the proportions of a size and resize images without distortion. Free, online.

Home: https://funworks.app/en/ · HTML: https://funworks.app/en/calcie/aspect-ratio/

*Sizes from an aspect ratio and ratios from sizes, for photos, video and screens.*

## What it calculates

Our aspect ratio calculator online finds the height from the width (or the other way around) for 16:9, 4:3, 3:2, 1:1, 21:9, 9:16 or any ratio of your own, and works out the ratio from known dimensions.

It's useful for photos, video, screens, banners and stories: the calculator shows the pixel count, the megapixels and the closest standard format.

- Preset ratios: 16:9, 4:3, 3:2, 1:1, 21:9, 9:16, 2:3, 5:4, plus your own
- The second side from the first
- The ratio from width and height, and the closest standard
- Pixels and megapixels

## How to use it

1. Pick the “Size by ratio” or “Ratio by size” tab.
2. Choose a ratio and enter a width or height.
3. See the second side, the pixels and the megapixels.

## Example

Width 1920 at 16:9 → **height 1080**

## FAQ

**What size do I need for stories?**

A 9:16 ratio, for example 1080 × 1920.

**What is the closest standard?**

If your dimensions nearly match a well-known ratio (within 1.5%), Calcie will point it out.

**How do I resize an image without distortion?**

Open the “Size by ratio” tab, set the original image's ratio and enter the new width. Calcie calculates the height that keeps the proportions.

**Does the “Aspect Ratio” mode work offline?**

Yes. Calcie does all its math right on your device, so the mode works on a plane, on the subway and out of town. Nothing is sent to any server, and the answer appears instantly.

**Is “Aspect Ratio” available on iPad and Mac?**

Yes. On iPad the mode has its own layout with larger fields, and on a Mac with Apple Silicon Calcie runs in its iPad version and works from the keyboard. Your Premium purchase applies on every device signed in with your Apple ID.

**How do I switch to the “Aspect Ratio” mode?**

Open the modes menu, the icon at the top left of the calculator's main screen, and choose “Aspect Ratio”. Calcie remembers your choice: next time the app opens right in that mode.

Try it right here: https://funworks.app/en/calcie/aspect-ratio/#calc · App Store: https://apps.apple.com/app/id6819202153

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FunWorks · https://funworks.app/en/ · support@funworks.app