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Centimeters to Inches
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// about this tool

Centimeters to Inches Online

Updated 2026-07-09

Convert centimeters to inches online for free. Enter a length in cm and SnapTools shows the exact value in inches instantly, in your browser — nothing is uploaded.

One centimetre is about 0.393701 inches, because an inch is exactly 2.54 cm — so you divide cm by 2.54. For quick reference: 1 cm ≈ 0.39 in, 5 cm ≈ 1.97 in, 10 cm ≈ 3.94 in, 30 cm ≈ 11.81 in, and 100 cm ≈ 39.37 in. Enter any value above for the precise figure, or use the full Length Converter for metres, feet, and more.

// how to use

  1. 1 Type a length in centimetres into the input.
  2. 2 SnapTools shows the value in inches instantly as you type.
  3. 3 Copy the result, or open the Length Converter for other units.

// examples

Screen or paper size
Input
30
Output
11.81102362
Round number
Input
10
Output
3.93700787

// common uses

Converting paper, screen, or fabric sizes to inches Reading metric measurements on a US-style ruler Following craft or sewing patterns across systems Checking a height or length quoted in cm

// faq

No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
One centimetre is about 0.393701 inches, because an inch is defined as exactly 2.54 centimetres. So you divide the cm value by 2.54 to get inches.
Divide by 2.54, or as a rough estimate divide by 2.5. 30 cm is about 11.8 inches. This tool gives the exact value.
In 1959 the inch was internationally standardised as exactly 2.54 centimetres, which makes cm-to-inch conversions exact rather than approximate.
Yes. Screen sizes are measured diagonally, so enter the diagonal in centimetres to get inches — the figure manufacturers usually quote.

// related

Inches to Centimeters Meters to Feet Kilometers to Miles Length Converter PX to REM Converter

Use this via API

Get a free API key → 
curl -X POST https://snaptools.dev/api/v1/tools/cm-to-inches \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"30"}'
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