BAS Field Reference Practice Tools Learn Books Troubleshoot

Home / Tools / Field tool

BAS Unit Converter

The conversions that come up in a mechanical room, without wading through a general-purpose converter.

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 a category, enter a value, and read across.
  2. Pressure is where most mistakes happen — inches of water column and PSI differ by a factor of about 27.7.
  3. All conversions are exact except where noted.

Background reading: Chapter 1 — points and units →

Go deeper

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.

Get BAS Field Fundamentals

Found a wrong number or a broken link? Tell me and I’ll fix it.