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Surface Current Density Converter

Convert between current density units: ampere per square meter (A/m²), ampere per square centimeter, milliampere per square meter, and more.

What this tool does

Convert between current density units: ampere per square meter (A/m²), ampere per square centimeter, milliampere per square meter, and more. Type an amount in amperes per square meter, choose the units, and the tool converts it to amperes per square centimeter. It offers 10 current density units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one from 10 options, including Ampere per square meter, Kiloampere per square meter, Milliampere per square meter, Microampere per square meter, Ampere per square centimeter, Milliampere per square centimeter. Starts as Ampere per square meter.
  • To: Choose one of the same 10 units as "From". Starts as Ampere per square centimeter.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from amperes per square meter to amperes per square centimeter:

  • 1 A/m² = 0.0001 A/cm²
  • 5 A/m² = 0.0005 A/cm²
  • 10 A/m² = 0.001 A/cm²
  • 50 A/m² = 0.005 A/cm²
  • 100 A/m² = 0.01 A/cm²

Multiply the number of amperes per square meter by 0.0001 to get amperes per square centimeter. Both units are exact definitions, so 0.0001 is the exact factor: 1 A/m² = 0.0001 A/cm².

Sources: Ampere per square meter: SI Brochure, 9th edition (2019). Ampere per square centimeter: exact by definition.

Limitations

  • Converts the unit of a current density only. It does not work out current density from current and cross-section.
  • Current per unit length (A/m) is a different quantity and is not included.

FAQs

Q: How many A/m² is one A/cm²?
A: One ampere per square centimeter is 10,000 amperes per square meter, because a square meter holds 10,000 square centimeters.
Q: How many A/m² is one A/in²?
A: One ampere per square inch is about 1550 A/m². The conversion uses the exact inch of 25.4 mm.
Q: Is this the same as surface current in A/m?
A: No. Current per unit length (A/m) is a different quantity. This page converts current per unit area (A/m²), which is usually just called current density.

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