Unit converter to pixel

Converts values between common length units and CSS pixels, helping frontend developers and designers ensure consistent layout measurements across devices and zoom levels.

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אודות כלי זה

This tool converts measurements between common physical units and CSS pixels for web design and development. It targets frontend developers, UI engineers, and designers who need exact layout, typography, and spacing values across devices. It supports quick one-to-one conversions and enables exploration across multiple target units to reduce guesswork.
Conceptually, the tool normalizes any source value to a pixel base using standard CSS conventions (1in = 96px, 1cm ≈ 37.795px, 1mm ≈ 3.7795px, 1pt ≈ 1.333px, 1pc = 16px) and then converts to the requested target unit. Em and rem conversions rely on a base font size (default 16px) when a value in those units is involved. This approach yields deterministic results suitable for design handoffs and QA checks.
The core value lies in accuracy, speed, and reproducibility: designers can compare conversions for typography, margins, and paddings, validate against design specs, and document exact factors used. Use cases include translating print-ready measurements to CSS for responsive typography, converting physical dimensions in mockups to web-ready units, and ensuring spacing scales correctly across breakpoints.

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איך להשתמש

Provide inputs: value, source_unit, target_unit, and optional font_size_px for em/rem.
Confirm unit choices align with CSS conventions (px, in, cm, mm, pt, pc, em, rem).
If converting to/from em or rem, specify a base font size (default 16px).
The tool computes the target value in the requested unit in real time.
Review the result, and repeat with different target units if needed for comparison.

Frequently Asked Questions

מצא תשובות מהירות

Which units are supported for conversion?

Supported units include px, in, cm, mm, pt, pc, em, and rem. Em and rem require a base font size to convert to and from pixels. If the base font size is not provided, 16px is assumed.

How is em/rem converted to pixels?

Em/rem values are multiplied by the base font size (font_size_px). For example, 2em with a 16px base equals 32px. Conversions from pixels to em/rem divide by the same base size.

What baseline is used for CSS pixel conversions?

The converter uses CSS standards: 1in = 96px, 1cm ≈ 37.795px, 1mm ≈ 3.7795px, 1pt ≈ 1.333px, and 1pc = 16px. These constants ensure web layout consistency across devices.

Can I round the output?

Yes. The tool supports rounding to a configurable number of decimal places. By default results are shown with typical double precision and can be adjusted for design handoffs.

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