Square Centimeters to Square Inches

Convert cm² to in² instantly — with a table, common amounts, and a live calculator.

1 cm² equals 0.155 in².

Updated Open the Unit Converter →

Convert any amount

Result (in²)0.155 in²

cm² to in² table

cm²in²
0.25 cm²0.0388 in²
0.5 cm²0.0775 in²
0.75 cm²0.116 in²
1 cm²0.155 in²
1.5 cm²0.233 in²
2 cm²0.31 in²
2.5 cm²0.388 in²
3 cm²0.465 in²
4 cm²0.62 in²
5 cm²0.775 in²
6 cm²0.93 in²
7 cm²1.09 in²
7.5 cm²1.16 in²
8 cm²1.24 in²
10 cm²1.55 in²
12 cm²1.86 in²
15 cm²2.33 in²
20 cm²3.1 in²
25 cm²3.88 in²
50 cm²7.75 in²
75 cm²11.63 in²
100 cm²15.5 in²

in² to cm² (reverse)

in²cm²
0.25 in²1.61 cm²
0.5 in²3.23 cm²
0.75 in²4.84 cm²
1 in²6.45 cm²
1.5 in²9.68 cm²
2 in²12.9 cm²
2.5 in²16.13 cm²
3 in²19.35 cm²
4 in²25.81 cm²
5 in²32.26 cm²
6 in²38.71 cm²
7 in²45.16 cm²
7.5 in²48.39 cm²
8 in²51.61 cm²
10 in²64.52 cm²
12 in²77.42 cm²
15 in²96.77 cm²
20 in²129.03 cm²
25 in²161.29 cm²
50 in²322.58 cm²
75 in²483.87 cm²
100 in²645.16 cm²

Common amounts

cm²in²
1/8 cm²0.0194 in²
1/4 cm²0.0388 in²
1/3 cm²0.0517 in²
1/2 cm²0.0775 in²
2/3 cm²0.103 in²
3/4 cm²0.116 in²
1 cm²0.155 in²
1 1/4 cm²0.194 in²
1 1/2 cm²0.233 in²
1 3/4 cm²0.271 in²
2 cm²0.31 in²
2 1/2 cm²0.388 in²

How it scales

0.160.310.470.6201234cm²

1 acre in other units

43560ft²4840yd²40470.4ha

The ratio at a glance

1 cm²0.16 in²

Imperial and metric area units

Square inches, square feet, square yards, acres, and square miles belong to the imperial/US system, while square centimeters, square meters, hectares, and square kilometers are metric. A square foot is defined as exactly 0.09290304 square meters, and an acre as exactly 4,046.8564224 square meters.

Area conversions are exact and rest on fixed factors — for more unit pairs, use our area conversion hub.

Where area conversions are used

Area conversions come up in property and land deals, flooring and paint estimates, and farming — switching between square metres, square feet, acres, and hectares.

  • One hectare is 10,000 m² (a square 100 m on each side); one acre is about 4,047 m².
  • Area scales with the square of length, so doubling a room's dimensions quadruples its floor area.
  • A football pitch is roughly 0.7 hectares, a useful mental yardstick for land size.

Frequently asked questions

How many in² are in a cm²?

1 cm² equals 0.155 in².

How many in² are in 2 cm²?

2 cm² equal 0.31 in².

How do I convert cm² to in²?

Divide the number of cm² by 6.45 to get in².

Is the cm²-to-in² conversion exact?

Yes. Area conversions are exact; the values here are only rounded to two decimal places.

Why are there imperial and metric area units?

Square inches, square feet, square yards, acres, and square miles belong to the imperial/US system, while square centimeters, square meters, hectares, and square kilometers are metric. All conversions rest on fixed, exact factors.

Convert any unit

The unit converter handles length, volume, weight, and more.

Open Unit Converter →