UnitsConverter.io

Square Inch to Square Centimeter Conversion Calculator: Free Online Tool

Convert square inches to square centimeters with our free online area converter.

Square Inch to Square Centimeter Calculator

Square Inch
Square Centimeter

How to Use the Calculator:

  1. Enter the value you want to convert in the 'From' field (Square Inch).
  2. The converted value in Square Centimeter will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Area category.
  4. Click the swap button (⇌) to reverse the conversion direction.

How to Convert Square Inch to Square Centimeter

Converting Square Inch to Square Centimeter involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

1 Square Inch = 6.4516 square centimeters

Example Calculation:

Convert 10 square inches: 10 × 6.4516 = 64.516 square centimeters

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

What is a Square Inch and a Square Centimeter?

The square inch (symbol: in², sq in) is an imperial and US customary unit of area. It represents the area of a square with sides that are each one inch long.

The square centimeter (symbol: cm²) is a unit of area in the metric system. It represents the area of a square with sides that are each one centimeter long.

Note: The Square Inch is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Square Centimeter belongs to the metric (SI) system.

History of the Square Inch and Square Centimeter

Derived from the inch, whose definition has varied historically but was standardized as 25.4 mm, the square inch became a common unit for small area measurements within the imperial system. It is frequently used in the US and UK for engineering and everyday measurements.

Derived directly from the centimeter (one-hundredth of a meter), the square centimeter became a standard small-scale unit of area with the adoption of the metric system during the French Revolution. It provides a finer measurement than the square meter for smaller objects.

Common Uses for square inches and square centimeters

Explore the typical applications for both Square Inch (imperial/US) and Square Centimeter (metric) to understand their common contexts.

Common Uses for square inches

  • Engineering & Manufacturing (US/UK): Specifying the area of small components, cross-sections, or surface areas.
  • Material Measurement: Measuring the area of small sheets of material (e.g., paper, fabric samples).
  • Pressure Measurement: Used implicitly in units like pounds per square inch (psi).
  • Crafts & Hobbies: Measuring fabric squares, paper sizes, or small design areas.

Common Uses for square centimeters

  • Science: Measuring the surface area of small samples, cross-sectional areas in biology or material science.
  • Medical Imaging: Often used to measure the area of lesions, organs, or specific regions in scans (e.g., MRI, CT).
  • Education: Used in geometry problems and science experiments for teaching area concepts at a smaller scale.
  • Manufacturing: Specifying the area of small components or surface features.

Frequently Asked Questions

Questions About Square Inch (in²)

How many square inches are in a square foot?

There are 144 square inches in one square foot (12 inches x 12 inches).

How many square centimeters are in a square inch?

One square inch is equal to exactly 6.4516 square centimeters.

Is the square inch used for large areas?

No, it's used for small areas. Square feet (ft²) or square yards (yd²) are used for room sizes, and acres (ac) or square miles (mi²) for land.

Is the square inch an SI unit?

No, it is part of the imperial and US customary systems. The corresponding metric units are square centimeter (cm²) or square millimeter (mm²).

About Square Centimeter (cm²)

How many square millimeters are in a square centimeter?

There are 100 square millimeters (mm²) in one square centimeter (10 mm x 10 mm).

How many square centimeters are in a square meter?

There are 10,000 square centimeters in one square meter (100 cm x 100 cm).

How many square inches are in a square centimeter?

One square centimeter is approximately 0.155 square inches.

Is cm² commonly used for large areas?

No, cm² is used for very small areas. Square meters (m²) or hectares (ha) are used for larger land or floor areas.

Conversion Table: Square Inch to Square Centimeter

Square Inch (in²)Square Centimeter (cm²)
16.452
532.258
1064.516
25161.29
50322.58
100645.16
5003,225.8
1,0006,451.6

All Area Conversions

Square Meter to Square KilometerSquare Meter to Square CentimeterSquare Meter to Square MillimeterSquare Meter to Square InchSquare Meter to Square FootSquare Meter to Square YardSquare Meter to Square MileSquare Meter to AcreSquare Meter to HectareSquare Kilometer to Square MeterSquare Kilometer to Square CentimeterSquare Kilometer to Square MillimeterSquare Kilometer to Square InchSquare Kilometer to Square FootSquare Kilometer to Square YardSquare Kilometer to Square MileSquare Kilometer to AcreSquare Kilometer to HectareSquare Centimeter to Square MeterSquare Centimeter to Square KilometerSquare Centimeter to Square MillimeterSquare Centimeter to Square InchSquare Centimeter to Square FootSquare Centimeter to Square YardSquare Centimeter to Square MileSquare Centimeter to AcreSquare Centimeter to HectareSquare Millimeter to Square MeterSquare Millimeter to Square KilometerSquare Millimeter to Square CentimeterSquare Millimeter to Square InchSquare Millimeter to Square FootSquare Millimeter to Square YardSquare Millimeter to Square MileSquare Millimeter to AcreSquare Millimeter to HectareSquare Inch to Square MeterSquare Inch to Square KilometerSquare Inch to Square MillimeterSquare Inch to Square FootSquare Inch to Square YardSquare Inch to Square MileSquare Inch to AcreSquare Inch to HectareSquare Foot to Square MeterSquare Foot to Square KilometerSquare Foot to Square CentimeterSquare Foot to Square MillimeterSquare Foot to Square InchSquare Foot to Square YardSquare Foot to Square MileSquare Foot to AcreSquare Foot to HectareSquare Yard to Square MeterSquare Yard to Square KilometerSquare Yard to Square CentimeterSquare Yard to Square MillimeterSquare Yard to Square InchSquare Yard to Square FootSquare Yard to Square MileSquare Yard to AcreSquare Yard to HectareSquare Mile to Square MeterSquare Mile to Square KilometerSquare Mile to Square CentimeterSquare Mile to Square MillimeterSquare Mile to Square InchSquare Mile to Square FootSquare Mile to Square YardSquare Mile to AcreSquare Mile to HectareAcre to Square MeterAcre to Square KilometerAcre to Square CentimeterAcre to Square MillimeterAcre to Square InchAcre to Square FootAcre to Square YardAcre to Square MileAcre to HectareHectare to Square MeterHectare to Square KilometerHectare to Square CentimeterHectare to Square MillimeterHectare to Square InchHectare to Square FootHectare to Square YardHectare to Square MileHectare to Acre

Other Units from Area