EVERYDAY
Area
Surface, land and cross-sectional area.
Try a decimal, 1e-9, 1/3, or 5 1/2.
Result100 mm²1 cm² = 100 mm²
EVERYDAY · ENGINEERING · SCIENCE
cm² to mm² Converter
Convert square centimetre (cm²) to square millimetre (mm²). Enter a value for an instant result, or use the examples and reverse conversion below.
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HOW IT IS CALCULATED
Convert through square metre
Enter a square centimetre value to calculate square millimetre with full internal precision before display rounding.
Display PrecisionAuto · 6 significant digits
Auto trims unnecessary zeroes and uses scientific notation for extreme magnitudes. Use Digits to set the display precision; calculations retain full precision.
QUICK REFERENCE
All units in this quantity
| Unit | Symbol | Converted value |
|---|---|---|
| square micrometrefrom cm² | µm² | 100000000 |
| square millimetrefrom cm² | mm² | 100 |
| square centimetrefrom cm² | cm² | 1 |
| square decimetrefrom cm² | dm² | 0.01 |
| square metrefrom cm² | m² | 0.0001 |
| arefrom cm² | a | 0.000001 |
| hectarefrom cm² | ha | 0.00000001 |
| square kilometrefrom cm² | km² | 1e-10 |
| square inchfrom cm² | in² | 0.155 |
| square footfrom cm² | ft² | 0.00107639 |
| square yardfrom cm² | yd² | 0.000119599 |
| acrefrom cm² | acre | 0.0000000247105 |
| square milefrom cm² | mi² | 3.86102e-11 |
| barnfrom cm² | b | 1e24 |
SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.
cm² to mm² Conversion Reference
Square Centimetre (cm²) and square millimetre (mm²) are units of area. Use this page to convert in either direction.
Conversion Examples
| Square Centimetre (cm²) | Square Millimetre (mm²) |
|---|---|
| 1 cm² | 100 mm² |
| 5 cm² | 500 mm² |
| 10 cm² | 1000 mm² |
| 100 cm² | 10000 mm² |
Examples are rounded to 6 significant digits. The interactive converter retains full calculation precision; change Display Precision to see more digits.
Reverse Conversion
mm² to cm² (square millimetre to square centimetre)
Related Area Conversions
cm² to µm² (square centimetre to square micrometre)cm² to dm² (square centimetre to square decimetre)cm² to m² (square centimetre to square metre)cm² to a (square centimetre to are)cm² to ha (square centimetre to hectare)cm² to km² (square centimetre to square kilometre)cm² to in² (square centimetre to square inch)cm² to ft² (square centimetre to square foot)cm² to yd² (square centimetre to square yard)cm² to acre (square centimetre to acre)cm² to mi² (square centimetre to square mile)cm² to b (square centimetre to barn)