Image scale converter

Calculates new image dimensions from original size or scale factor for designers and developers needing quick, accurate pixel results.

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3,488+

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 scale 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

Calculates new image dimensions from an original size using either a scale factor or explicit target dimensions. This tool is intended for designers, developers, and content teams who need precise pixel sizes for web, mobile, or print assets.
Conceptually, it treats image resizing as a numeric transformation: a scale factor multiplies width and height; target sizes compute a scale based on the most constraining dimension when preserving aspect ratio. Rounding to integers ensures valid pixel values.
Its value lies in speed, accuracy, and reproducibility across many assets. It clearly communicates the chosen method, handles edge cases, and outputs dimensions that can feed into pipelines or asset catalogs without performing any image processing.

Save your calculation history with a free account

How to Use

Provide inputs: original_width_px, original_height_px, and choose method (scale_factor or target_dimensions).
If using scale_factor, enter the factor (e.g.,
and decide whether to maintain aspect ratio.
If using target_dimensions, enter target_width_px and/or target_height_px and set aspect ratio preservation as desired.
Run calculation to obtain new_width_px and new_height_px.
Review outputs and export if required.

Frequently Asked Questions

Find Quick Answers

How do I preserve aspect ratio?

Enable maintain_aspect_ratio. If only one target dimension is provided, the other dimension is computed to preserve the original proportion. If both target dimensions are given and aspect ratio is kept, the tool uses the most constraining dimension to determine a uniform scale and then applies it to both axes.

What happens if both target width and height are provided?

If preserve aspect ratio is on, the tool determines the limiting dimension and scales accordingly; if off, it uses exactly the provided dimensions.

Does this tool modify the image data?

No. It only computes new dimension values; no image data is read or written, and no resampling or compression is performed.

What units are used and what is the output?

All inputs and outputs are in pixels; values are integers after rounding; outputs present new_width_px and new_height_px.

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