Aspect Ratio Calculator

📘 How to Use

Enter the original width (W₁) and original height (H₁) on the left. Then enter either a new width (W₂) or new height (H₂) on the right — the tool will automatically calculate the missing value to maintain the original aspect ratio.

You can modify any value at any time. The result updates in real-time and the visual preview below helps you see the scale.

• W₁ = Original Width
• H₁ = Original Height
• W₂ = Target Width (optional)
• H₂ = Target Height (optional)

📐 Aspect Ratio Formula

This tool uses the principle of proportional scaling, ensuring that the aspect ratio stays the same:

W₁ / H₁ = W₂ / H₂

Which means:

• If W₂ is given: H₂ = (W₂ / W₁) × H₁
• If H₂ is given: W₂ = (H₂ / H₁) × W₁

✅ Common Use Cases

• Resizing images and videos while keeping proportions
• UI & responsive layout design
• Social media content formatting (Instagram, TikTok, etc.)
• Poster, ad, or thumbnail creation

📊 Example