# GB Gas Pipe Sizing Calculator — Natural Gas Pipe Sizer > Metric natural gas pipe sizing calculator for UK installations. (iPhone/iPad app by GB-GAS.CO.UK.) - Source: https://appshunter.io/ios/app/gb-gas-pipe-sizing-calculator/id427457719 (this page in markdown: same URL + `.md`) - Developer: [GB-GAS.CO.UK](https://appshunter.io/developer/425897007) - Category: Business, Utilities - Price: $9.99 - Age rating: 4+ - Requires: iOS 26.0 · 2 MB - Released: 2011-03-28 - Data updated: 2026-09-04 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/gb-gas-pipe-sizing-calculator/id427457719/reviews.md ## What is GB Gas Pipe Sizing Calculator? A natural gas pipe sizing calculator for metric copper, stainless and stainless semi rigid pipes (U.K.). Simply input the information for the appliances Gas Rate size the meter length of pipe in the installation and how many bends will be used. This will tell you if the installation will meet the requirement of a 1mb drop from the meter to the appliance. If not adjust the pipe sizes to get an instant answer to see if it works. Only works for metric 35,32,28,22,15,12,10,8 mm pipes Steel pipes or imperial copper equivalent sizes could be used to give you a good idea, but will not be completely accurate. No need to use calculations and tables to work out pipe sizes, it even tell you what size of gas meter should be fitted. This design tool completes all the hard stuff for you. Pipe tables and pressure drops will only work upto 30m lengths of the chosen diameter. If you find that the pressure drop does not change when changing the diameter, then try a smaller pipe size it may work ## Key features - Metric pipe sizing - Copper, stainless, and semi-rigid pipe support - Calculates 1mb pressure drop - Suggests gas meter size - Supports up to 30m pipe lengths - Instant results for pipe adjustments ## Recent user reviews (10 of 16) All indexed reviews: https://appshunter.io/ios/app/gb-gas-pipe-sizing-calculator/id427457719/reviews.md ### 5/5 — Good app *2019-03-18* If your a total mong then you’ll struggle with this app, if you can spell your name then it’s actually a really decent app. ### 1/5 — Not a pipe size calculator !! CRAP *2018-10-31* This app does not tell you what size pipe is required for each branch. Not eorth buying it, i regretted buying it 5 minutes later !!! ### 1/5 — Gas pipe App *2018-05-10* Do not bother!!! Rubbish. ### 4/5 — Good little app *2014-02-02* This is a good little app for checking gas pipe sizing. It confirmed I had an undersized gas pipe and meter. It was easy to change the sizing and do a recheck. Results can be stored as a picture and printed out. ### 2/5 — Gas pipe size calculator *2013-08-28* After paying £5 for this app I was hoping it would be more advanced then the cheaper ones . It would nice to see an app which tells you how much of each size copper pipe can be used at each section before being able to reduce down ie 5m of 28mm copper and then 10m of 22mm whilst adding bends, elbows tees etc. perhaps the ability to add appliances kw ratings as well . Thanks ### 1/5 — Poo avoid !! Rip off !! :( *2013-01-03* Avoid u have to put all info in your self ### 4/5 — Gas Man *2012-06-04* Good app which basically does what it says, would be great to have non domestic pipe sizes added as it would really save time when on commercial gas jobs, would happily recommend. ### 2/5 — Ok for small installations!! *2012-04-16* This is only a good app if you aren't doing a u16 meter, and would be greatly improved if you could input the kw of the appliance, especially considering the price. Apart from that it's very easy to use ### 2/5 — Not great *2012-01-31* Would be better if you could just type what flow you need and then it tells you min pipe size ### 1/5 — Pipe sizing *2012-01-01* This app don't work for pipe sizes above 22 mm for the 1st run and the answers are all out by 0.3 mbars ## Frequently asked questions about GB Gas Pipe Sizing Calculator ### What pipe materials does GB Gas Pipe Sizing Calculator support? GB Gas Pipe Sizing Calculator supports metric copper, stainless steel, and stainless semi-rigid pipes. While steel pipes or imperial copper equivalents can provide a good idea, they may not be completely accurate for calculations. ### What is the maximum pipe length supported by GB Gas Pipe Sizing Calculator? Pipe tables and pressure drops will only work up to 30m lengths of the chosen diameter in GB Gas Pipe Sizing Calculator. If the pressure drop does not change when changing the diameter, try a smaller pipe size. ### Does GB Gas Pipe Sizing Calculator work for imperial pipe sizes? GB Gas Pipe Sizing Calculator primarily works for metric pipe sizes (35, 32, 28, 22, 15, 12, 10, 8 mm). While imperial copper equivalents can offer an estimate, they are not guaranteed to be completely accurate. ### What is the price of GB Gas Pipe Sizing Calculator? GB Gas Pipe Sizing Calculator is a paid application priced at $7.99. There are no in-app purchases or subscriptions required after the initial purchase. ### On which devices can I use GB Gas Pipe Sizing Calculator? GB Gas Pipe Sizing Calculator is available for iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS operating system. ### How often is GB Gas Pipe Sizing Calculator updated? The latest version of GB Gas Pipe Sizing Calculator is 8, and it was last updated on July 19, 2020. This indicates the app has not received updates in over three years. ### What age rating does GB Gas Pipe Sizing Calculator have? GB Gas Pipe Sizing Calculator has an age rating of 4+. This suggests it is suitable for users of all ages, with no mature content. ### Does GB Gas Pipe Sizing Calculator have ads? No, GB Gas Pipe Sizing Calculator does not contain advertisements. As a paid application, it provides an ad-free experience for users. ## Version history (last 5 releases) ### 10 — 2026-08-11 Game changing calculation method that tells you the pipe diameters required... No guessing on a rule of thumb and proving it works , then moving back to resize other sections. This calculator works forward then back to find out the smallest pipe diameter so that the meter to the appliance drop is less than 1mb. This then works out the installation volume, the purge volume and the purge type. This will also give you the new IGE UP 1B permissable pressure drop for existing systems. It has a page to work out each section of a pipe system seperatly, just like long hand with no mistakes, this includes every pipe material including MDPE. ### 8 — 2020-07-19 Ios Update fixes. ### 7 — 2017-08-02 Updates for IOS and IPad Corrections ### 6 — 2017-04-07 Updates for new IOS issues in preparation for Major update to new British Standards ### 5.2 — 2014-01-09 screen size fix for iOS 7 ## Apps similar to GB Gas Pipe Sizing Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [FlowReporter](https://appshunter.io/ios/app/flowreporter/id1581923311) | — | Free | Business | | [Gas App Uk](https://appshunter.io/ios/app/gas-app-uk/id1033168436) | 3.0 (2) | Free | Business | | [Printer app, Smart AIR printer](https://appshunter.io/ios/app/printer-app-smart-air-printer/id6754819617) | 4.0 (1) | Free | Business | | [Renewable Energy Hub](https://appshunter.io/ios/app/renewable-energy-hub/id1559013094) | — | Free | Business | ## More apps by GB-GAS.CO.UK - [GB Gas Heat Input Calculator](https://appshunter.io/ios/app/gb-gas-heat-input-calculator/id426032737) - [GB Gas Ventilation Calculator](https://appshunter.io/ios/app/gb-gas-ventilation-calculator/id426220160) - [GB Gas Purging Calculator](https://appshunter.io/ios/app/gb-gas-purging-calculator/id426227084) - [GB Gas Tightness Testing](https://appshunter.io/ios/app/gb-gas-tightness-testing/id428846431) - [GB Gas Tightness NG + LPG](https://appshunter.io/ios/app/gb-gas-tightness-ng-plus-lpg/id430236121) All apps by GB-GAS.CO.UK: https://appshunter.io/developer/425897007 ## Related topics [gb gas pipe sizing calculator](https://appshunter.io/ios/topics/gb-gas-pipe-sizing-calculator) · [pipe sizing](https://appshunter.io/ios/topics/pipe-sizing) · [natural gas pipe size](https://appshunter.io/ios/topics/natural-gas-pipe-size) · [gas pipe sizing calculator](https://appshunter.io/ios/topics/gas-pipe-sizing-calculator) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*