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What is a centimeter?

The everyday unit for body measurements, clothing and furniture

Definition

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.

Common uses

  • Height and body measurements in medical records
  • Ready-to-wear clothing sizes in Europe and Asia
  • Furniture and interior design dimensions

🌍 Real-world scale

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.

Convert from centimeters

14 conversions
Centimeter to Meter1 cm = 0.01 mCentimeter to Kilometer1 cm = 1.0000e-5 kmCentimeter to Millimeter1 cm = 10 mmCentimeter to Mile1 cm = 6.2137e-6 miCentimeter to Yard1 cm = 0.01094 ydCentimeter to Foot1 cm = 0.03281 ftCentimeter to Inch1 cm = 0.3937 inCentimeter to Nautical Mile1 cm = 5.3996e-6 nmiCentimeter to Micrometer1 cm = 10,000 µmCentimeter to Nanometer1 cm = 10,000,000 nmCentimeter to Light Year1 cm = 1.0570e-18 lyCentimeter to Furlong1 cm = 4.9710e-5 furCentimeter to Fathom1 cm = 0.005468 ftmCentimeter to Angstrom1 cm = 100,000,000 Å

Convert to centimeters

14 conversions
Meter to Centimeter1 m = 100 cmKilometer to Centimeter1 km = 100,000 cmMillimeter to Centimeter1 mm = 0.1 cmMile to Centimeter1 mi = 160,934.4 cmYard to Centimeter1 yd = 91.44 cmFoot to Centimeter1 ft = 30.48 cmInch to Centimeter1 in = 2.54 cmNautical Mile to Centimeter1 nmi = 185,200 cmMicrometer to Centimeter1 µm = 1.0000e-4 cmNanometer to Centimeter1 nm = 1.0000e-7 cmLight Year to Centimeter1 ly = 9.4607e17 cmFurlong to Centimeter1 fur = 20,116.8 cmFathom to Centimeter1 ftm = 182.88 cmAngstrom to Centimeter1 Å = 1.0000e-8 cm

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.

Common mistakes

  • 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).

FAQ about the centimeter

What is a centimeter?
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.
Where is the centimeter used?
The centimeter is commonly used for: Height and body measurements in medical records; Ready-to-wear clothing sizes in Europe and Asia; Furniture and interior design dimensions.
What is an example of a centimeter in real life?
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.
What category does the centimeter belong to?
The centimeter is a unit of length, part of the 15-unit length category on UnitConv.
How accurate are centimeter conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 15 length units and their conversions.📏 Length hub →