PX to CH Converter

PX → CH Converter

The size you want to express in ch.
Enter any CSS font stack. Example: Georgia, 'Times New Roman', serif
1ch equals the width of “0” for the current font, weight, and size.
Optional: Fluid Font Size (clamp)
If Min = Max, converter uses a fixed font-size (no fluid scaling).
Measured 1ch (current settings): —
PX → CH: —
CSS Snippet:
.element { width: 0ch; }
💡 Quick Presets:
📊 At Different Viewports (Result in ch):
📱 Mobile (375px): —
📱 Tablet (768px): —
💻 Desktop (1440px): —
Live Preview (Respects current font settings):
This box uses the computed ch value. Change font, weight, or size to see it update.
Current window width: —

PX to CH Converter 

The ch unit in CSS represents the width of the “0” (zero) character of the element’s font. It’s often used to define text containers, input widths, or layouts that should scale based on character count rather than pixels.

For example:

input {

  width: 30ch; /* fits ~30 characters */

}

This ensures the input width adapts to font metrics, instead of being locked to pixels.

Why Use a PX to CH Converter?

Pixels (px) are absolute units, while ch is relative to the font’s glyph width. Manually converting between them can be tricky because it depends on the font in use. A converter helps you:

  • Estimate text container widths in characters instead of pixels.
  • Build responsive form fields that adapt to different fonts.
  • Improve readability by designing layouts based on character length.
  • Save time compared to manual calculations.

How to Use the Converter

  1. Enter your pixel width.
  2. Specify your font’s character width (average px per “0”).
  3. Instantly see the equivalent ch value.
  4. Copy the generated value into your CSS.

Example Output:

textarea {

  width: 45ch; /* ~360px if 1ch ≈ 8px */

}

PX to CH Conversion Example

Assuming 1ch ≈ 8px (varies by font):

Pixels (px)CH (approx.)
80px10ch
160px20ch
240px30ch
320px40ch
400px50ch

(Use the calculator for precise results with your font settings.)

Best Practices for Using CH

  • Form inputs: Define widths in ch to align with expected character count.
  • Code blocks: Helps in setting widths based on average line length.
  • Responsive design: Works well for layouts where content length matters more than pixel precision.
  • Accessibility: Avoids overly wide text blocks, improving readability.

FAQs

What does 1ch equal in pixels?
It equals the width of the “0” glyph in the font being used. Typically ~8px at 16px font size, but it varies by font.

Is ch the same across all fonts?
No. The value depends on the font metrics, so 1ch can differ between Arial, Times New Roman, or monospace fonts.

When should I use ch instead of px?
Use ch when sizing text-related elements like inputs, code containers, or text blocks, so widths match character count.

Does ch work in all browsers?
Yes — all modern browsers support the ch unit.Can I mix ch with other CSS units?
Absolutely. Many developers use ch alongside em, rem, or even clamp() for more flexible responsive design.