Image dimension converter

A free online tool to compute target image dimensions from source dimensions with optional aspect ratio preservation.

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2,732+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Image dimension converter processes input data instantly inside your browser.

Sample Input Birth date: Jan 15, 1995, Target date: Oct 20, 2023
Computed Result Chronological Age: 28 Years, 9 Months, 5 Days (10,505 days elapsed)
Execution Mode Client-Side In-Browser JS
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About This Tool

This tool computes target image dimensions from known source dimensions. It supports preserving aspect ratio, and can fit within a specified target size or apply an explicit width or height. It is designed for designers, developers, and content teams preparing assets for web, app, or print workflows.
Conceptually, you input source_width and source_height in pixels, and either target_width or target_height. The tool calculates a scale factor and reports final_width and final_height in px. If aspect preservation is enabled, one provided target dimension determines the scale and the other is derived to maintain the original proportion.
If both target dimensions are provided, the tool reconciles them according to the chosen mode (preserve aspect or override), and notes any resulting changes in aspect ratio. Outputs also include applied_scale and, when relevant, a suggested canvas size for web or print pipelines. The tool does not modify actual image data; it provides dimension guidance that can be pasted into editors, CMSs, or build pipelines. Beneficiaries include web designers, marketing teams, and developers who need precise, repeatable size adjustments across multiple assets. Unique value lies in combining straightforward math with optional fit strategies and clear, export-ready outputs. Core features include input validation, aspect-ratio handling, unit-consistency, and precise px results. Use cases include resizing banners, thumbnails, and hero images while maintaining proportion and target bounds.

How to Use

Provide inputs: source_width, source_height (in px).
Choose whether to preserve aspect ratio.
Enter target_width or target_height (px) as needed.
The tool computes final_width and final_height (px) and the scale factor.
Review outputs and export results to your workflow.

How to use image dimension converter free

Frequently Asked Questions

Find Quick Answers

What units are supported?
The primary unit is pixels (px). Other units can be interpreted if conversions are enabled, but results are presented in px to align with common web dimensions and asset pipelines.
What happens if both target dimensions are provided?
If aspect ratio is preserved, the tool uses the dimension that best preserves proportions and adjusts the other accordingly. If not preserving, both dimensions are applied directly, potentially changing the aspect ratio.
Will this tool modify my image?
No. It only computes target dimensions. Resize must be performed in an image editor or CMS using the resulting width and height to modify the actual file.

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