Pipe Sizing Calculator - GES

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.