Image Size Converter

This tool provides precise calculations to convert image dimensions across units and DPIs for multiple output targets. It accepts width and height in px, inches, centimeters, or millimeters, together with current DPI and a desired target DPI. Users can choose to preserve the aspect ratio so the other dimension scales proportionally, ensuring the original image proportions are maintained. The core output includes new dimensions in the chosen unit, the corresponding pixel area, and a scale factor relative to the original pixel dimensions. Conceptually, the workflow converts inputs to pixel space, derives physical size in inches, applies the target DPI to obtain new pixel counts, and converts back to the requested unit for display. This enables quick assessment of print sizes, web assets, and app-ready images without manual calculations. Benefits include faster iteration for responsive design, print preflight, and asset cataloging, all while avoiding guesswork in unit conversions. Core features are multi-unit input support, DPI-aware scaling, and explicit reporting of the resulting pixel area and scale factor. Use cases span web optimization (adjusting assets to target pixel counts), print production (matching physical sizes at specified DPI), and asset management workflows requiring consistent dimensional metadata. The tool emphasizes numerical precision and transparent math, allowing accurate planning across devices and media formats.