Current converter
Convert between A, mA, µA, dBA, dBmA and dBµA current units.
Formulas
dBµA = 20·log₁₀(A) + 120
dBA = 20·log₁₀(A)
1 A = 10³ mA = 10⁶ µA
Engineering background
Current dB units reference 1 µA. CISPR 25 current-probe conducted-emission limits are expressed in dBµA.
Key benefits
01
Convert between A, mA, µA, dBA, dBmA and dBµA in one click, no lookup tables or calculators needed.
02
Matches CISPR 25 current-probe limit units for direct comparison with measurements.
03
Linked conversion eliminates magnitude errors (such as missing a 10³ factor).
How to use
- 1 Enter a known current value in any unit field.
- 2 All other units update in real time.
- 3 Click "Share link" to save the current state.
Use cases
- › CISPR 25 conducted-emission (current-probe method) limit comparison for automotive parts.
- › Common-mode / differential-mode current assessment on power lines.
- › Before/after current reading comparison during EMC troubleshooting.
FAQ
What is the offset between dBµA and dBmA?
60 dB. 1 mA = 10³ µA, so dBµA = dBmA + 60.
Does the current-probe method measure current or voltage?
A current probe senses common-mode current on the cable; the receiver reading is converted to dBµA using the probe transfer impedance.