4-20mA Current Loop Calculator

Convert between engineering units and 4-20mA signal levels for process instrumentation.

Current measured value in engineering units.
Value corresponding to 4 mA.
Value corresponding to 20 mA.
Total loop resistance in ohms.
Ω

Results

Current Signal-mA
Span Percentage-%
Loop Voltage Drop-V
References: ISA-50.00.01; IEC 60381-1; HART Protocol Specification