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4–20 mA and 0–10 V Scaling

Signal to engineering units, or back the other way. The most-used calculation in the trade.

Free tool · BAS Field Fundamentals

Works offline. Every calculation runs on your device, no signal needed. Install the BAS Field Reference app to keep it on your phone.

How to use it

  1. Pick the signal type, or choose Custom to enter your own range.
  2. Enter the engineering range the sensor or actuator is scaled to.
  3. Enter either a signal value or an engineering value — the other is calculated.
  4. If a reading is off, check that the device's range matches what the controller thinks it is. Mismatched ranges are far more common than bad sensors.

Background reading: Chapter 1 — what is a point? →

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More where this came from

This calculator comes out of BAS Field Fundamentals — the meter tests, the maths and the failure modes for every sensor, drive and control loop in the building, plus 20 field cases and a browser simulator to practice on.

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