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Pixel dimension calculator

Image Dimensions Calculator

Calculate image dimensions, aspect ratio, total pixels, megapixels, and print size from width and height.

Planning workflow

Calculate the target first, then convert, compress, resize, or clean the image with AI when needed.

Calculate Dimensions

Calculate dimensions, compression, file size, print size, and web image budget from one set of inputs.

Free calculator
Aspect ratio
16:9

2,073,600 total pixels, 2.07 MP.

Estimated file size
454 KB

Estimated WEBP output at 80% quality.

Compression needed
79.2%

Save about 950 KB to reach 250 KB.

Resize result
960 x 540

Estimated resized file: 113 KB.

Print size

6.40 x 3.60 in

At 300 DPI. Try 300 for high-quality prints or 150 for larger viewing-distance prints.

Website budget

125 KB each

Current estimate is 3.54 MB for 8 images against a 1,000 KB budget.

Social size targets
Square post1080 x 1080 (1:1)
Portrait feed1080 x 1350 (4:5)
Landscape post1200 x 630 (1.91:1)
Story/Reel cover1080 x 1920 (9:16)

Understand image dimensions quickly

Width and height determine where an image works best: web pages, thumbnails, marketplace uploads, social posts, and print layouts all have different dimension needs.

This calculator converts dimensions into aspect ratio, megapixels, estimated file size, and print size so users can plan the next edit.

Image planning targets

Fast landing pages
Under 1 MB total image weight
Resize large images, convert to WebP or AVIF, then compress.
Product catalog uploads
Consistent ratio and predictable KB size
Plan dimensions first, then clean watermark or logo artifacts.
Print or document use
Enough pixels at 150-300 DPI
Check print size before upscaling or enhancing the photo.

Frequently asked questions

What are image dimensions?

Image dimensions are the width and height of an image measured in pixels.

Are larger dimensions always better?

Not always. Larger images can show more detail, but they also create larger files and slower pages.

What dimensions should I use for web images?

Use dimensions close to the display size. Avoid uploading very large originals when a page only shows a smaller image.

Plan the image, then improve it

Use free calculators for sizing and compression decisions, then use Photo Cut tools when the image needs AI cleanup, watermark removal, logo removal, or smarter compression.