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Centimetres to Inches

1 centimetre = 0.3937 inches · 1 in = 2.54 cm

1 centimetre = 0.3937 inches

How it’s calculated

in = cm ÷ 2.54

  • Divide the value in centimetres by 2.54.
  • Equivalently, multiply by 0.3937007874.
  • 1 cm = 0.3937007874 in · 1 in = 2.54 cm
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 cm = 0.01 m and 1 in = 0.0254 m, so 1 in = 2.54 cm. Source: BIPM SI Brochure (9th ed.); NIST SP 811 / Handbook 44.

  2. Multiply by the factor written as a fraction

    Put cm in the denominator so it cancels, leaving in.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 0.3937 in

1 cm in other units

Batch convert cm → in
Results
  1. 1 cm = 0.3937 in
  2. 5 cm = 1.9685 in
  3. 10 cm = 3.937 in
  4. 25 cm = 9.8425 in

Permanent link to this conversion

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Quick examples

  • 1 centimetre = 0.3937 inches
  • 5 centimetres = 1.9685 inches
  • 10 centimetres = 3.937 inches
  • 25 centimetres = 9.8425 inches
  • 100 centimetres = 39.37 inches

About these units

Centimetre (cm)

SI (metric)

Exactly 1/100 of a metre.

1 cm = 0.01 m

Source: BIPM SI Brochure (9th ed.)

Inch (in)

US & imperial (identical)

Exactly 2.54 cm (international inch, 1959).

1 in = 0.0254 m

Source: NIST SP 811 / Handbook 44

Centimetres to inches conversion table

centimetre (cm) to inch (in)
Centimetres (cm)Inches (in)
0.1 cm0.03937 in
0.5 cm0.19685 in
1 cm0.3937 in
2 cm0.7874 in
3 cm1.1811 in
4 cm1.5748 in
5 cm1.9685 in
6 cm2.3622 in
7 cm2.7559 in
8 cm3.1496 in
9 cm3.5433 in
10 cm3.937 in
15 cm5.9055 in
20 cm7.874 in
25 cm9.8425 in
30 cm11.811 in
40 cm15.748 in
50 cm19.685 in
75 cm29.528 in
100 cm39.37 in
250 cm98.425 in
500 cm196.85 in
1,000 cm393.7 in

Related conversions

Frequently asked questions

How do I convert centimetres to inches?

Use in = cm ÷ 2.54. Divide the value in centimetres by 2.54.

How many inches are in 1 centimetre?

1 centimetre (cm) equals 0.3937 inches (in); more precisely 0.3937007874.

How many centimetres are in 1 inch?

1 inch (in) equals 2.54 centimetres (cm).

What is 10 cm in in?

10 centimetres = 3.937 inches.

What is a centimetre?

Exactly 1/100 of a metre.

What is a inch?

Exactly 2.54 cm (international inch, 1959).

Formula: in = cm ÷ 2.54. Factors last reviewed 2026-10-27.