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Surface Charge Density Converter

Convert between different units of surface charge density with precision

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Common Conversions
Quick access to frequently used conversions
Unit Information

SI Units

International System of Units (SI) measurements

C/m²
si
Coulomb per Square Meter
Base unit of surface charge density in the SI system
C/cm²
si
Coulomb per Square Centimeter
10,000 coulombs per square meter (1 × 10⁴ C/m²)
C/mm²
si
Coulomb per Square Millimeter
1,000,000 coulombs per square meter (1 × 10⁶ C/m²)
mC/m²
si
Millicoulomb per Square Meter
One thousandth of a coulomb per square meter (1 × 10⁻³ C/m²)
μC/m²
si
Microcoulomb per Square Meter
One millionth of a coulomb per square meter (1 × 10⁻⁶ C/m²)
nC/m²
si
Nanocoulomb per Square Meter
One billionth of a coulomb per square meter (1 × 10⁻⁹ C/m²)

Practical Units

Commonly used units in practical applications

Ah/m²
practical
Ampere-hour per Square Meter
Surface charge density equivalent to 1 ampere-hour per square meter
mAh/m²
practical
Milliampere-hour per Square Meter
Surface charge density equivalent to 1 milliampere-hour per square meter

CGS Units

Centimeter-gram-second system units

statC/cm²
cgs
Statcoulomb per Square Centimeter
CGS unit of surface charge density (3.336 × 10⁻⁶ C/m²)
abC/cm²
cgs
Abcoulomb per Square Centimeter
CGS electromagnetic unit of surface charge density (100,000 C/m²)

Engineering Units

Imperial and other engineering units

C/in²
engineering
Coulomb per Square Inch
Surface charge density in imperial units (1550 C/m²)
C/ft²
engineering
Coulomb per Square Foot
Surface charge density in imperial units (10.76 C/m²)
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About Surface Charge Density

Surface charge density is a measure of electric charge per unit area. It's commonly used in electrical engineering, electrostatics, and physics to describe how electric charge is distributed over a surface, such as a capacitor plate, conductor surface, or dielectric interface.

Common Applications

  • Capacitor Design: Calculating charge distribution on parallel plate capacitors
  • Electrostatics: Analyzing charge distribution on charged surfaces
  • Semiconductor Physics: Understanding charge distribution at interfaces
  • Transmission Lines: Analyzing charge distribution on conductors

Key Units

  • C/m² (Coulomb per Square Meter): The SI base unit for surface charge density
  • C/cm² (Coulomb per Square Centimeter): Common in practical applications
  • C/mm² (Coulomb per Square Millimeter): Used for high-density applications
  • Ah/m² (Ampere-hour per Square Meter): Useful for battery and energy applications
  • statC/cm² (Statcoulomb per Square Centimeter): CGS unit system

Conversion Examples

  • 1 C/m² = 0.0001 C/cm² = 0.000001 C/mm²
  • 1 C/cm² = 10,000 C/m² = 0.01 C/mm²
  • 1 C/mm² = 1,000,000 C/m² = 100 C/cm²
  • 1 Ah/m² = 3600 C/m² = 0.36 C/cm²
  • 1 statC/cm² = 3.336 × 10⁻⁶ C/m²

Practical Considerations

Surface charge density is crucial in many electrical applications. High surface charge densities can lead to electric field breakdown, while low densities may result in insufficient charge storage. Understanding the relationship between different units helps engineers design better electrical systems and analyze charge distribution patterns.