UNITSFree
PX to VW Converter
Pixels to vw, then the same vw across eight viewport widths so you can see it collapse on a phone, plus the clamp() that stops it.
48px at 1920 = 2.5vw · 9px on a phoneCSS Values 4 →WordPress 7.1+ Ready345 tools in this category
Typography & Units Tools
The measurements behind a layout: type scales, font pairings, ratios, and converting between the units CSS and print disagree about.
Tools
UNITSFree
Inch to CM Converter
Inches to centimetres at exactly 2.54, which has been the definition since 1959, with the pixel and point equivalents alongside.
Exact since 1959, not a roundingArithmetic →UNITSFree
MM to PX Converter
Millimetres to CSS pixels at the specified 3.779528 to the millimetre, plus what those pixels actually measure on a real screen.
Exact by definition, not by measurementCSS Values →RATIOFree
Golden Ratio Calculator
Divide a length at φ, get the type scale and the golden rectangle, and read why the ratio is useful without being the law of beauty it is sold as.
960px → 593.313 + 366.687 · scale to 109.666pxArithmetic →GRIDFree
Grid Column & Gutter Calculator
Column width from container, columns and gutter, solved in any direction, with the span table and the reminder that twelve columns have eleven gutters.
1200px, 12 cols, 24px gap → 78px · span 4 = 384pxArithmetic →PRINTFree
DPI to PPI Converter
What an image prints at, what resolution a size needs, and why a 1200 dpi printer wants a 150 ppi file rather than a 1200 ppi one.
Dots of ink are not pixelsArithmetic →SEQUENCEFree
Fibonacci Sequence Calculator
Fibonacci terms through BigInt, exact past F(79) where a JavaScript number stops being, with the golden ratio convergence decided exactly.
A double is wrong from term 79BigInt →TYPEFree
Font Pairing Generator
Fourteen font pairings that work, set in your own words, with the CSS, the theme.json or the link tags to put them on a site.
--font-heading: "Fraunces", Georgia, serif;Google Fonts →UNITSFree
CSS Font Size & Unit Converter
Convert one CSS length into every other unit, with the context each relative unit depends on stated rather than assumed.
2rem → 32px · 24pt · 2.5vwCSS Values 4 →UNITSFree
Aspect Ratio Calculator
Work out the missing dimension at a given ratio, see the ratio reduced to its smallest terms, and copy the CSS that holds it at any width.
1200 wide at 16 / 9 → 675 tallCSS Sizing 4 →Intuitive Workflow
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