Is CSS clamp() universally supported across browsers?

Yes, CSS clamp() is supported across all modern browsers including Chrome, Safari, Edge, and Firefox with >98% global market share.

Updated: August 2026 • Verified v1.2

CSS Fluid Typography clamp() Calculator & Viewport Scaler

Creative & DesignNew

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

slope = (maxFont - minFont) / (maxView - minView); intercept = minFont - slope * minView; clamp(minRem, slopeVw + interceptRem, maxRem)

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Understanding Your Results

Computes mathematical slope in vw and y-intercept in rem, generates pure CSS and Tailwind CSS classes, and provides interactive viewport scaler preview.

Practical Guidance & Next Steps

Using rem for min/max and the intercept preserves user browser accessibility zoom settings, unlike raw vw units.

What is this?

A design engineering utility that calculates CSS clamp() fluid typography formulas with slope and rem intercept values.

How does it work?

1. Input minimum and maximum font sizes (in pixels). 2. Input minimum and maximum target viewport widths. 3. Copy the computed CSS clamp() expression or Tailwind CSS arbitrary class with live scaler testing.