UnitConvConvert
Length

Convert centimeters to inches

1 cm=0.3937in

Use the converter below to change any centimeters value into inches instantly — with formula, conversion table, and real-world examples.

0.3937

Conversion formula

Forward
inches = centimeters × 0.3937
Reverse
centimeters = inches × 2.54

Example: 10 cm × 0.3937 = 3.93701 in.

About both units

From

Centimeter

cm

The centimeter equals one hundredth of a meter and is the everyday metric unit for body measurements, clothing sizes and furniture. European clothing tags, height on ID documents and household rulers are all marked in cm. An A4 sheet is 21 × 29.7 cm.

Real-world: An average adult is 160–185 cm tall. An A4 sheet is 21 × 29.7 cm. A standard passport photo is 3.5 × 4.5 cm.
Read full centimeter reference →
To

Inch

in

The inch equals 2.54 centimeters exactly since 1959. It is the global standard for screen diagonal sizes — a "55-inch TV" has a 139.7 cm diagonal. Pipe diameters, US and UK shoe sizes, and hard-drive form factors are all specified in inches. 1 inch = 1/12 foot = 1/36 yard.

Real-world: A 65-inch TV has a 165 cm diagonal. A smartphone screen is typically 6–7 inches. Standard copper plumbing in the UK is ½ inch or ¾ inch.
Read full inch reference →

Centimeter to Inch conversion table

Common centimeters to inches values for quick reference.

Centimeter (cm)Inch (in)
1 cm0.3937 in
5 cm1.9685 in
10 cm3.93701 in
25 cm9.84252 in
50 cm19.685 in
100 cm39.3701 in
250 cm98.4252 in
500 cm196.85 in
1,000 cm393.701 in
5,000 cm1,968.5 in

Tips & common mistakes

Quick tips

  • 1 cm ≈ 0.394 inches — divide cm by 2.54 for a precise inch conversion.
  • Your little finger is about 1 cm wide at the nail — useful when no ruler is nearby.
  • 100 cm = 1 metre exactly. Always convert to metres for architectural plans.

Avoid these

  • Confusing linear cm with square cm. 21 cm of ribbon is not the same as 21 cm² of fabric.
  • Using 2.5 instead of 2.54 for inch conversion — the 1.6% error grows on long measurements.
  • Reading a clothing size label as cm when it is actually an EU size code (e.g. size 42 ≠ 42 cm).

Frequently asked questions

How many inches in a centimeter?
One centimeter equals 0.3937 inches.
How do I convert centimeters to inches?
Multiply the centimeter value by 0.3937 to get the equivalent in inches.
What is 100 centimeters in inches?
100 centimeters equals 39.3701 inches.
Is a centimeter bigger than a inch?
No. 1 centimeter equals 0.3937 inches, so one centimeter is smaller.
How to convert centimeters to inches without a calculator?
Multiply by 0.39 for a quick estimate; use a calculator for precise results.

Related length conversions

📊 See full comparison matrix →

More from Centimeter

cm → m
1 = 0.01 m
cm → km
1 = 1.0000e-5 km
cm → mm
1 = 10 mm
cm → mi
1 = 6.2137e-6 mi
cm → yd
1 = 0.01094 yd
cm → ft
1 = 0.03281 ft
cm → nmi
1 = 5.3996e-6 nmi
cm → µm
1 = 10,000 µm

More to Inch

m → in
1 = 39.3701 in
km → in
1 = 39,370.08 in
mm → in
1 = 0.03937 in
mi → in
1 = 63,360 in
yd → in
1 = 36 in
ft → in
1 = 12 in
nmi → in
1 = 72,913.39 in
µm → in
1 = 3.9370e-5 in

Conversions in other categories

WeightKilogram → PoundTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePressureBar → Pound per Square InchPowerKilowatt → Mechanical Horsepower