Conversion method
Charge per area. Denominator prefixes are raised to the indicated power; signed charge is supported.
µC/m² = x × 1000000
10 C/m² = 10000000 µC/m².
| C/m² | µC/m² |
|---|---|
| 1 | 1000000 |
| 5 | 5000000 |
| 10 | 10000000 |
| 25 | 25000000 |
| 50 | 50000000 |
| 100 | 100000000 |
Unit definitions and sources
Charge per area. Denominator prefixes are raised to the indicated power; signed charge is supported.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Coulomb per meter² (C/m²); si | Common units | Coulomb per meter²: base (c-m) = value × 1. Common use: Surface Charge Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Microcoulomb per meter² (µC/m²); si | Common units | Microcoulomb per meter²: base (c-m) = value × 1e-06. Common use: Surface Charge Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Coulomb per centimeter² (C/cm²); si | Specialist units | Coulomb per centimeter²: base (c-m) = value × 10000. Common use: Surface Charge Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Nanocoulomb per meter² (nC/m²); si | Specialist units | Nanocoulomb per meter²: base (c-m) = value × 1e-09. Common use: Surface Charge Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Coulomb/square inch (C/(in²)); other | Specialist units | coulomb/square inch = 1550.0031000062002 c-m, derived from the component SI/customary definitions. Common use: Surface Charge Density. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of surface charge density conversions
All 5 surface charge density units convert through Coulomb per meter² (C/m²). 5 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.