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CSS Unit & Clamp Calculator

Media & Design

Essential styling toolkit for frontend developers and designers. Convert between Pixels (px), REM, EM, and Viewport units, and generate fluid responsive CSS clamp() formulas with ease.

100% Client-Side

PX ↔ REM ↔ EM Converter

px
REM (Root EM)
1.5rem
EM (Relative)
1.5em
Viewport Width (VW)
1.6667vw
Points (PT)
18pt

Responsive CSS clamp() Fluid Typography Generator

Calculates responsive typography that scales smoothly between mobile and desktop viewports.

CSS clamp() Rule
font-size: clamp(1.0000rem, 0.5856rem + 1.7680vw, 2.0000rem);
Simulate Viewport Width: 800pxRendered Size: ~24px
The quick brown fox jumps over the lazy dog.

Zero-Knowledge Privacy Guarantee

This CSS Unit & Clamp Calculator executes 100% locally in your browser’s JavaScript memory using client-side Web APIs. No inputs, keys, tokens, files, or outputs are ever uploaded to any server or logged in any database.

Key Features & Capabilities

  • Two-way conversion: PX ↔ REM ↔ EM ↔ VW ↔ Percentage
  • Configurable base font size (default: 16px)
  • Responsive CSS clamp() fluid typography generator (min/max viewport & font sizes)
  • Interactive visual preview with responsive resizing slider

How to Use This Tool

  1. 1Enter your pixel or rem values to see real-time conversions.
  2. 2Configure your base root font size (e.g. 16px or 10px).
  3. 3Use the Fluid Typography tab to generate clamp(min, preferred, max) for fluid responsive typography.

Frequently Asked Questions (FAQ)

REM units scale proportionally with the user's browser root font size settings, ensuring accessibility for visually impaired users who adjust default font sizes.

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