GES Gas Pipe Sizing Calculator

Quick gas pipe sizing for natural gas and LPG, on copper and steel pipework. Built for UK gas engineers who'd rather not be flicking through a sizing chart on the side of a job.

Enter your pipe details and gas rate, and the calculator works out the right size in seconds. Useful on quotes, on installs, on fault-finding visits — anywhere you'd normally reach for a chart.

WHAT IT DOES

• Sizes gas pipes for natural gas and LPG
• Works with copper and steel pipework
• Designed for UK domestic work
• Free to download, no signup required

WHY ENGINEERS LIKE IT

• No digging out paperwork in a customer's loft
• Faster than scrolling through a PDF chart or drawing diagrams by hand
• Clean enough to use in front of a customer
• Works on phone or tablet

GOOD FOR APPRENTICES AND ACS REVISION Studying for your ACS or working through your apprenticeship? Use it to sense-check your manual calculations and get a feel for how pipe length, fittings and gas rate affect sizing — before you're doing it for real on site.

WHO IT'S FOR

• Gas Safe registered engineers
• Heating and plumbing companies
• Gas installers working on natural gas or LPG
• Apprentices and trainees on ACS courses

A FREE TOOL FROM GAS ENGINEER SOFTWARE (GES) Built by the team behind Gas Engineer Software — the UK job-management app used by gas engineers, heating companies and plumbing firms to handle certificates, quotes, scheduling and invoicing. The Gas Pipe Sizing Calculator is a standalone tool — completely free.