What's the best way to calculate aspect ratio?

Advantages:

• ✅No math needed
• ✅Instant results
• ✅Multiple format options
• ✅Works with images directly
• ✅Free and no sign-up required

How to use:

1. Go to our aspect ratio calculator
2. Enter your width and height
3. Get results instantly
4. See all ratio formats (16:9, 1.78:1, etc.)

Formula:

Aspect Ratio = Width ÷ Height

Steps:

1. Get your dimensions (in pixels or inches)
2. Divide width by height to get decimal form
3. Simplify by finding the greatest common divisor (GCD)
4. Express as ratio like 16:9

Example:

• Dimensions: 1920 × 1080
• Divide: 1920 ÷ 1080 = 1.78
• GCD of 1920 and 1080 = 120
• 1920 ÷ 120 = 16
• 1080 ÷ 120 = 9
• Result: 16:9

Windows:

1. Right-click image → Properties
2. Details tab → Dimensions

Mac:

1. Right-click image → Get Info
2. More Info → Image section

Photoshop:

• Image → Image Size
• Shows dimensions automatically

Preview (Mac):

• Open image → Tools → Adjust Size
• Displays current dimensions

Choose the calculator if:

• You want instant results
• You're not comfortable with math
• You need multiple formats
• You're working with images

Choose manual calculation if:

• You want to learn the concept
• You're teaching others
• You need to understand the math

Choose image properties if:

• You only need to check once
• You're already viewing the image
• You want the exact file dimensions

Tip 1: Decimal vs Ratio

• Decimal: 1.78:1 (divide width by height)
• Ratio: 16:9 (simplified whole numbers)
• Both are correct, just different formats

Tip 2: Round Numbers

If your calculation gives something like 1.777..., that's 16:9 (or 1.78:1 rounded)

Tip 3: For Resizing

When resizing, multiply by the aspect ratio:

• Original: 1920×1080
• Aspect ratio: 1.78:1
• New width 800: 800 ÷ 1.78 = 449 height