Surface Charge Density Converter

How to Use

1. 1Type a surface charge density value in the input field
2. 2Select your starting unit from the From dropdown - choose from SI / Metric, Imperial, or CGS / Scientific
3. 3Select your target unit from the To dropdown - the result appears instantly
4. 4All 17 conversions appear simultaneously, grouped by unit system
5. 5Hover any result row to reveal the copy (📋) and use-as-input (⇅) buttons
6. 6Click the copy icon to copy a value to your clipboard
7. 7Click ⇅ on any row to use that unit and value as the new input for instant reverse conversion
8. 8Use the ⇄ button between From and To to swap both units while updating the value
9. 9Adjust 'Sig. figures' to control result precision (3 to 12 significant digits)
10. 10Toggle 'Sci notation' for very small CGS values (statC/cm²) or very large values such as C/mm²
11. 11Collapse a group by clicking its header to reduce clutter when you only need one unit system
12. 12Open 'Common conversions & electrostatics reference' at the bottom for a quick-reference table with typical capacitor and semiconductor values

Features

• 17 surface charge density units across 3 unit systems
• SI / Metric (9 units): C/m², mC/m², µC/m², nC/m², pC/m², C/mm², C/cm², µC/cm², mC/cm²
• Imperial (4 units): C/in², µC/in², C/ft², C/yd²
• CGS / Scientific (4 units): statC/cm², abC/cm², abC/m², e/nm²
• Includes C/m² - the SI base unit used in electrostatics, capacitors, and semiconductor physics
• Includes µC/cm² - the common engineering unit in capacitor datasheets and older literature
• Includes e/nm² - used in nanotechnology and molecular simulations (1 e/nm² ≈ 0.1602 C/m²)
• Includes statC/cm² - the natural Gaussian CGS unit for surface charge density
• All 17 conversions shown simultaneously - no need to select a single target unit
• Click any result row to use it as the new input for instant reverse conversion
• Adjustable significant figures: 3, 4, 5, 6, 8, 10, or 12 digits
• Toggleable scientific notation - essential for CGS units spanning many orders of magnitude
• Collapsible unit-system groups to reduce visual clutter
• One-click copy to clipboard for any converted value
• Quick-reference table with 12 entries including typical capacitor, semiconductor, and breakdown values
• Exact factors: 1 in² = 6.4516 × 10⁻⁴ m² (exact), 1 abC = 10 C (exact), 1 statC ≈ 3.3356 × 10⁻¹⁰ C
• Default: 1 C/m² → µC/cm² (= 100 µC/cm², most common SI-to-engineering conversion)
• 100% browser-based - no server, no data upload

Frequently Asked Questions