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Surface current density converter
Current crossing an area — what sets conductor sizing. 4 units, converted from one table of exact factors.
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1 ampere/square meter in every other surface current density unit
Computed by the same engine that runs the converter above, so these can never drift apart from it.
| From | Equals | Unit |
|---|---|---|
| 1 ampere/square meter | 0.000001 | ampere/square millimeter (A/mm²) |
| 1 ampere/square meter | 0.0001 | ampere/square centimeter (A/cm²) |
| 1 ampere/square meter | 0.00064516 | ampere/square inch (A/in²) |
What each unit actually is
Most converters give you a number and stop. Where a figure is exact by definition we say so, and where it is an average or shifts with conditions we say that too — that is usually the thing you needed to know.
| Unit | Symbol | What it actually is |
|---|---|---|
| ampere/square meter | A/m² | SI. |
| ampere/square millimeter | A/mm² | The number electricians size cable by. |
| ampere/square centimeter | A/cm² | |
| ampere/square inch | A/in² |
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