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Automation / Analog signals

4–20 mA Scaling Calculator

Set the process range, choose the conversion direction, and enter the signal or process value.

Calculator

4–20 mA Scaling Calculator

Results update automatically.

Converted value—

Formula

Value = Min + (mA − 4) / 16 × (Max − Min)mA = 4 + (Value − Min) / (Max − Min) × 16

Worked example

For a 0–100 °C transmitter, 12 mA represents 50 °C. A 75 °C setpoint corresponds to 16 mA.

Interpret the range before the number

4 mA represents the lower process limit, not zero current. A reading outside 4–20 mA may indicate a diagnostic condition or overrange; verify the device manual before treating it as a measurement.

The process unit is whatever your sensor measures. The calculator does not infer whether the range represents temperature, pressure, level or percent.