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Free Tools for Gas Technicians

Converters and calculators for the numbers gas work runs on. Free, no account, and they keep working offline once loaded.

Pressure converterConvert between PSI, inches of water column and kilopascals. The three units gas work moves between constantly.Temperature converterCelsius to Fahrenheit and back, with the formulas and the values that come up in gas work.BTU / kW converterConvert between BTU per hour, kilowatts and boiler horsepower — the three ways heating capacity gets quoted.Combustion airHow much air an appliance needs, from its input rating — for natural gas or propane.Pipe sizing helperWork through the four steps with your own numbers. It shows the method and the figures to take to the B149.1 tables.

Built for the trade, not just the exam

These are the conversions that come up on a job as often as in a classroom — reading a manifold pressure, sizing air for an appliance, or working out what a rating plate in kilowatts means in BTU. They are free and they always will be.

If you are studying for the G3

The exam expects most of these from memory rather than from a calculator. Every tool page includes the underlying formula and the values worth committing to memory, so you can use it now and stop needing it later.

Try the free 20-question mock exam →

The full G3 exam guide →