Size Input

Width

Height

Unit

DPI/PPI

Color depth

Lock aspect ratio

Results

Aspect ratio1.78:1

Total pixels2,073,600 px

Uncompressed size5.93 MB

Unit conversions

Calculated at 96 DPI

Unit	Width	Height
Pixels	1920	1080
Millimeters	508.00	285.75
Centimeters	50.80	28.57
Inches	20.00	11.25

Estimated sizes

Format	Size
JPG	486.00 KB
PNG	1.78 MB
WebP	243.00 KB
GIF	2.08 MB

Estimated values

Free Image Size Calculator - Calculate Dimensions & File Size

Calculate image dimensions, file size, and resolution instantly with our free online image size calculator. Convert between pixels, inches, and centimeters. Estimate JPG, PNG, WebP file sizes. Calculate aspect ratio and total pixels for any image.

Powerful Image Size Calculator Features

Dimension Calculator

Calculate image dimensions in pixels, inches, cm, or mm. Free image size calculator converts between units instantly. Enter width and height to get accurate image dimension calculations.

File Size Estimator

Estimate image file sizes for JPG, PNG, WebP, and GIF formats. Image size calculator predicts compressed file sizes. Calculate storage requirements before creating images.

Aspect Ratio Calculator

Calculate image aspect ratio automatically. Image dimension calculator shows common ratios like 16:9, 4:3, 1:1. Lock aspect ratio to maintain proportions when resizing.

Unit Conversion

Convert image dimensions between pixels, inches, centimeters, and millimeters. Image size calculator handles DPI/PPI conversions. See dimensions in all units simultaneously.

Color Depth Options

Calculate file sizes for different color depths. Image calculator supports 1-bit, 8-bit, 24-bit RGB, 32-bit RGBA, and 48-bit high color. Estimate uncompressed image sizes.

Instant Results

Get image size calculations instantly. Free calculator updates results in real-time as you type. No waiting, no processing delays for dimension and file size estimates.

How to Calculate Image Size

Enter Image Dimensions

Input image width and height in pixels, inches, cm, or mm. Image size calculator accepts any unit. Enter dimensions you want to calculate file size for.

Set DPI and Color Depth

Specify DPI/PPI resolution for print size calculations. Choose color depth (1-bit, 8-bit, 24-bit RGB, 32-bit RGBA, 48-bit). Image calculator uses these for accurate file size estimates.

View Calculated Results

See aspect ratio, total pixels, and uncompressed size instantly. Image size calculator displays results in real-time. View estimated file sizes for JPG, PNG, WebP, GIF formats.

Check Unit Conversions

Review dimensions converted to all units. Image calculator shows pixels, mm, cm, and inches simultaneously. Use conversions for print or screen size planning.

Image Size Calculator Use Cases

Web Image Planning

Calculate optimal image dimensions for websites. Image size calculator helps estimate file sizes for web performance. Plan image dimensions to meet size budgets and loading speed requirements.

Print Size Calculation

Calculate print dimensions from pixel sizes. Image calculator converts pixels to inches or cm at specified DPI. Determine if image resolution is sufficient for print quality.

Social Media Images

Calculate image sizes for social media platforms. Image dimension calculator ensures correct sizes for Instagram, Facebook, Twitter. Verify images meet platform requirements before creation.

Storage Planning

Estimate storage requirements for image collections. Image file size calculator predicts space needed for different formats. Plan storage capacity for photography or design projects.

Resolution Verification

Verify image resolution meets requirements. Image size calculator shows total pixels and aspect ratio. Ensure images have enough resolution for intended use.

Format Comparison

Compare file sizes across image formats. Image calculator estimates JPG, PNG, WebP sizes. Choose optimal format for balancing quality and file size.

Image Size Calculation Tips

Lock Aspect Ratio

Enable aspect ratio lock to maintain image proportions. Image size calculator automatically adjusts height when changing width. Prevents distortion when calculating new dimensions.

Consider DPI for Print

Use 300 DPI for high-quality prints, 150 DPI for draft prints. Image calculator shows physical dimensions at different DPI values. Higher DPI requires larger pixel dimensions for same print size.

Screen vs Print Sizes

Screen images typically use 72-96 DPI. Print images need 300+ DPI. Image size calculator helps convert between screen and print dimensions for optimal quality.

Compressed vs Uncompressed

Image calculator shows uncompressed size and estimated compressed sizes. Actual file sizes vary based on image content and compression settings. Use estimates for planning purposes.

Color Depth Impact

Higher color depth increases file size. Image size calculator shows how 24-bit RGB vs 32-bit RGBA affects size. Choose appropriate color depth for your needs.

Total Pixels Matter

Total pixels (width × height) determines image detail. Image calculator shows total pixels for resolution comparison. Higher pixel counts allow larger prints or more detail.

Why Use Our Image Size Calculator

100% Free Calculator

Calculate unlimited image sizes completely free. No subscriptions, no hidden costs, no watermarks. Free image size calculator with all features available to everyone forever.

Instant Calculations

Get image dimension and file size results instantly. Real-time calculations as you type. No waiting, no delays. Fast image size calculator for quick results.

Multiple Unit Support

Calculate in pixels, inches, centimeters, or millimeters. Image size calculator converts between all units automatically. See dimensions in preferred measurement system instantly.

Multiple Format Estimates

Estimate file sizes for JPG, PNG, WebP, and GIF formats simultaneously. Image calculator helps choose optimal format. Compare sizes to balance quality and file size.

Comprehensive Results

Get aspect ratio, total pixels, uncompressed size, and format estimates. Image size calculator provides all information needed for image planning. Complete dimension and size analysis.

Works Offline

Image size calculator works in browser, even offline after initial load. No server required for calculations. Calculate image dimensions anywhere without internet connectivity.

Image Size Calculator FAQ

An image size calculator computes image dimensions, file sizes, and resolution specifications. It converts between measurement units (pixels, inches, cm) and estimates file sizes for different formats. Free online image calculators help plan image creation and storage.

Enter image width and height in pixels, select color depth (24-bit RGB or 32-bit RGBA), and the image size calculator estimates file sizes. Results show uncompressed size and estimated compressed sizes for JPG, PNG, WebP, GIF formats.

Enter pixel dimensions and DPI/PPI value. Image size calculator converts pixels to inches using formula: inches = pixels ÷ DPI. Higher DPI values result in smaller physical dimensions for same pixel count.

Use 72-96 DPI for screen/web images, 150 DPI for draft prints, 300 DPI for high-quality prints. Image size calculator shows physical dimensions at specified DPI. Print images need higher DPI for quality.

Aspect ratio is the proportional relationship between width and height. Image calculator computes ratio by dividing width by height and simplifying. Common ratios include 16:9 (widescreen), 4:3 (standard), 1:1 (square).

Estimated sizes are approximations based on compression averages. Actual file sizes vary based on image content complexity and compression settings. Simple images compress more than complex ones. Use image calculator estimates for planning.

Total pixels = width × height. Image size calculator multiplies image dimensions to get total pixel count. Example: 1920×1080 image has 2,073,600 total pixels (2.07 megapixels). Higher pixel counts allow larger prints.

24-bit (RGB) stores red, green, blue channels (16.7 million colors). 32-bit (RGBA) adds alpha transparency channel. Image size calculator shows 32-bit images have 33% larger uncompressed sizes than 24-bit due to extra channel.

Yes! Enter pixel dimensions and set DPI to 300 for print. Image calculator converts to inches or centimeters. Ensure total pixels are sufficient for desired print size at 300 DPI for quality results.

Estimates are based on typical compression ratios for each format. JPG estimates assume medium quality compression, PNG assumes typical lossless compression. Actual sizes may vary ±30% depending on image content complexity and settings.

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