About this converter
Surface charge density measures electric charge per unit area. Coulomb per square meter (C/m²) is the SI unit, 1 mC/m² equals 0.001 C/m², and 1 C/cm² equals 10,000 C/m² because one square centimeter is one ten-thousandth of a square meter.
This converter supports SI, square-centimeter, square-inch, millicoulomb, and CGS abcoulomb units. Electrical engineers, capacitor designers, semiconductor researchers, electrostatics students, and materials scientists use these conversions for charged surfaces, interfaces, dielectric films, and Gauss-law calculations.
How to Use This Converter
- Enter the surface charge density value.
- Select the source unit from the From menu.
- Select the target unit from the To menu.
- Read the converted result and formula line.
- Use Swap to reverse the selected units.
Units Covered
| Unit | Symbol | Common Use |
|---|---|---|
| Coulomb per square meter | C/m² | SI electrostatics, capacitor plates, and surface charge models. |
| Coulomb per square centimeter | C/cm² | High-density charge values on small surface areas. |
| Coulomb per square inch | C/in² | Inch-based engineering references and surface calculations. |
| Millicoulomb per square meter | mC/m² | Smaller lab and materials surface-charge readings. |
| Abcoulomb per square meter | abC/m² | CGS electromagnetic surface charge density. |
| Abcoulomb per square centimeter | abC/cm² | CGS centimeter-scale electrostatic references. |
| Abcoulomb per square inch | abC/in² | Mixed CGS and inch-based legacy calculations. |
C/m² to mC/m² Conversion Table
| From | To |
|---|---|
| 0.001 C/m² | 1 mC/m² |
| 0.01 C/m² | 10 mC/m² |
| 0.05 C/m² | 50 mC/m² |
| 0.1 C/m² | 100 mC/m² |
| 0.5 C/m² | 500 mC/m² |
| 1 C/m² | 1,000 mC/m² |
| 2 C/m² | 2,000 mC/m² |
| 5 C/m² | 5,000 mC/m² |
| 10 C/m² | 10,000 mC/m² |
| 25 C/m² | 25,000 mC/m² |
How to Convert C/m² to mC/m²
Coulombs per square meter to millicoulombs per square meter
For example, 0.12 C/m² x 1,000 = 120 mC/m².
Millicoulombs per square meter to coulombs per square meter
For example, 850 mC/m² / 1,000 = 0.85 C/m².
When You Need to Convert Surface Charge Density
Capacitor and electrostatic field calculations usually use C/m², while lab measurements may be easier to read in mC/m². A plate charge density of 0.02 C/m² equals 20 mC/m².
Semiconductor interface and dielectric film work may use small physical areas. A value of 0.00003 C/cm² equals 0.3 C/m² after the square-centimeter area conversion.
CGS electromagnetic references use abcoulombs. A surface value of 0.04 abC/m² equals 0.4 C/m², so converting charge units first avoids misreading older literature.