Enter the value to convert into the box and modify the accuracy of the conversion by selecting number of significant figures or decimal places by clicking on the boxes provided.

Conversion Formulae

The conversion formula for square centimetres (sq cm) to square inches (sq in) conversions is as follows:

- 1 square centimetre = 0.15500031 square inches

The conversion formula for square inches (sq in) to square centimetres (sq cm) conversions is as follows:

- 1 square inch = 6.4516 square centimetres

Square Centimetres
### Unit System

### Definition

### Base Unit

### Abbreviation

### Information

### More Information

### Global Adoption

### Conversion Formulae

The square centimetre is a unit of area, its size is that of a square with sides of one centimetre.

SI Metric

The square centimetre is defined as the area covered by a square with sides of one centimetre.

Metre

Formal: cm2

The abbreviation sq cm is also often used.

The square centimetre is an SI metric unit of area, it is one ten thousandth (1/10000) of a square metre.

Square centimetres are used worldwide for scientific applications and in the vast majority of countries worldwide in day to day use. The major exceptions being the United States and Liberia, where the metric system has not been adopted. In the UK, Canada and other former British Commonwealth countries metric units such as the square centimetre are sometimes not used by the general public.

- 1 square centimetre = 100 square millimetres
- 1 square centimetre = 0.0001 square metres
- 1 square centimetre = 0.00000001 hectares
- 1 square centimetre = 0.0000000001 square kilometres

- 1 sqaure millimetre = 0.01 square centimetres
- 1 square metre = 10,000 square centimetres
- 1 hectare = 100,000,000 square centimetres
- 1 sqaure kilometre = 10,000,000,000 square centimetres

Square Inches
### Unit System

### Definition

### Base Unit

### Abbreviation

### Information

### More Information

### Global Adoption

### Conversion Formulae

The square inch is a unit of area that covers a square with sides of one inch in length, it is often used for measuring small areas, such as the size of a postcard.

Imperial & US Customary

The square inch is defined as the unit of area covering a square with sides of one inch.

Yard

Formal: in2

The abbreviation sq in is also often used and sq ins can sometimes be seen for numbers above one.

The sqaure inch is derived from the inch, which in turn is derived from the formal definition of the yard. A square inch is 1/1296th of a square yard.

Wikipedia: UK Weights and Measures Acts

Square inches are a standard unit of area in the United States and Liberia and are still used informally in the United Kingdom and other British Commonwealth countries that formerly used Imperial units as standard.

- 1 sqaure inch = 0.006944444 sqaure feet
- 1 sqaure inch = 0.000771605 square yards
- 1 sqaure inch = 0.000000159 acres
- 1 sqaure inch = 0.000000000249 square miles

Conversions accurate to 9 decimal places.

- 1 square foot = 144 square inches
- 1 square yard = 1,296 square inches
- 1 acre = 6,272,640 square inches
- 1 square mile = 4,014,489,600 square inches

sq cm to sq in Values

sq cm | sq in |

1 | 0.16 |

2 | 0.31 |

3 | 0.47 |

4 | 0.62 |

5 | 0.78 |

6 | 0.93 |

7 | 1.09 |

8 | 1.24 |

9 | 1.40 |

10 | 1.55 |

sq cm | sq in |

10 | 1.55 |

20 | 3.10 |

30 | 4.65 |

40 | 6.20 |

50 | 7.75 |

60 | 9.30 |

70 | 10.85 |

80 | 12.40 |

90 | 13.95 |

100 | 15.50 |

sq cm | sq in |

100 | 15.50 |

200 | 31.00 |

300 | 46.50 |

400 | 62.00 |

500 | 77.50 |

600 | 93.00 |

700 | 108.50 |

800 | 124.00 |

900 | 139.50 |

1,000 | 155.00 |

sq in to sq cm Values

sq in | sq cm |

1 | 6.45 |

2 | 12.90 |

3 | 19.35 |

4 | 25.81 |

5 | 32.26 |

6 | 38.71 |

7 | 45.16 |

8 | 51.61 |

9 | 58.06 |

10 | 64.52 |

11 | 70.97 |

12 | 77.42 |

sq in | sq cm |

12 | 77.42 |

24 | 154.84 |

36 | 232.26 |

48 | 309.68 |

60 | 387.10 |

72 | 464.52 |

84 | 541.93 |

96 | 619.35 |

108 | 696.77 |

120 | 774.19 |

132 | 851.61 |

144 | 929.03 |