Surface Charge Density Converter
Convert charge per area between C/m², µC/cm² and pC/mm².
YOUR CALCULATION
Result
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Calculation steps
Work through one step at a time or reveal the complete calculation. The steps use your current inputs.
How to calculate
Convert charge to coulombs and the denominator area to square meters.
Surface charge density in C/m² = value × charge factor / length factor²
Worked example
1 µC/cm² is 0.01 C/m². One pC/mm² is 1 µC/m².
Assumptions and input details
Retain the same signed surface charge and physical area. Surface density is not a line or volume density, and no thickness is assumed. The tool does not infer electric field, polarization, electric displacement, dielectric breakdown or total charge from a unit conversion.
References: BIPM: SI quantities and prefixes
Using this calculator
Can I enter my own problem?
Yes. Replace the example values with your own inputs. The result, calculation steps, tables and applicable diagrams update from those inputs. Blank or invalid values clear the result; example values are never silently substituted for missing inputs.
Are the results exact?
Results use floating-point arithmetic and displayed rounding. Read the formula, assumptions and any stated data precision before interpreting the result.
Is my input uploaded?
The calculation runs in your browser. No account, file upload or external AI service is required. Inputs are not saved between page reloads.
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