Aspect Ratio Calculator | Resize Dimensions & Detect Ratio - Online Nil - Online Nil

Aspect Ratio Tool

Smart Calculator by Online Nil

Select Preset

Width (px)

Height (px)

Target Ratio

I have Width (px):

You need a height of:

📂 Click to Upload Image
Supports JPG, PNG, WebP

Image Analysis:

Welcome to the Online Nil Aspect Ratio Calculator. This free tool helps graphic designers, video editors, and web developers calculate dimensions, find aspect ratios, and resize images instantly without losing quality.

Why Use This Tool?

🚀 Smart Detection Since we know you work with laptops and cameras, our tool automatically identifies "Approximate Ratios" like 1366x768 as standard 16:9 screens.

🖼️ Visual Preview Don't just look at numbers. Our dynamic preview box changes shape in real-time, letting you visualize the crop before you apply it.

📂 Image Analysis Have a file but don't know its size? Upload any JPG or PNG, and we will instantly tell you its exact Width, Height, and Aspect Ratio.

How to Calculate & Resize

Using the Calculator

1. Enter your Width and Height in pixels.

2. The tool will instantly show the Ratio (e.g., 16:9).

3. Use the "Copy" button to use this data in Photoshop or Premiere Pro.

Using the Resizer

1. Switch to the "Resizer" tab.

2. Enter your target ratio (e.g., 4:5 for Instagram).

3. Enter the Width you have. The tool will calculate the exact Height you need.

Common Aspect Ratios Cheat Sheet

Use this quick reference guide for your daily projects:

Ratio	Platform / Device	Standard Resolution
16:9	YouTube, HD TV, Laptops	1920 x 1080
1:1	Instagram / Facebook Posts	1080 x 1080
9:16	TikTok, IG Reels, YouTube Shorts	1080 x 1920
4:5	Instagram Portrait	1080 x 1350
4:3	iPad, Old TV, CCTV	1024 x 768

Frequently Asked Questions (FAQ)

What is the Aspect Ratio of 1920x1080?

The aspect ratio of 1920x1080 is 16:9. This is the standard High Definition (HD) format used for most YouTube videos, televisions, and computer monitors.

How do I resize an image without stretching it?

To resize without stretching, you must maintain the original aspect ratio. Use our "Resizer" tab, enter the original ratio, and then enter your new width. The tool will give you the correct height to keep the image shape perfect.

What is the best ratio for Instagram?

For standard posts, use 1:1 (Square). For portrait photos, use 4:5. For Reels and Stories, the standard is 9:16 (Full mobile screen).