# GB Gas Heat Input Calculator > Calculates natural gas heat input and gas rate for installations. (iPhone/iPad app by GB-GAS.CO.UK.) - Source: https://appshunter.io/ios/app/gb-gas-heat-input-calculator/id426032737 (this page in markdown: same URL + `.md`) - Developer: [GB-GAS.CO.UK](https://appshunter.io/developer/425897007) - Category: Business, Utilities - Price: Free - Age rating: 4+ - Requires: iOS 8.0 · 21 MB - Languages: American English - Released: 2011-03-21 - Data updated: 2026-09-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/gb-gas-heat-input-calculator/id426032737/reviews.md ## What is GB Gas Heat Input Calculator? A simple heat input and gas rate calculator for timing Natural Gas installations. Time the Metric meter for any time (two minutes is more accurate), input the first and second reading, press calculate and your answer is there. For imperial meters time, one revolution then press calculate, with out putting readings into the metric reading boxes and your answer is there. No more looking up charts or using long-winded calculations... It is so simple ## Key features - Heat input calculation - Gas rate calculation - Metric meter timing - Imperial meter timing - Instant results - Eliminates chart lookup ## Recent user reviews (10 of 56) All indexed reviews: https://appshunter.io/ios/app/gb-gas-heat-input-calculator/id426032737/reviews.md ### 1/5 — Poor visual interface. Poor response *2026-07-04* Unreadable instruction page unless you have lazer vision. App seems to be working but not very user friendly. ### 1/5 — Need to review *2021-07-29* It seems it doesn’t do the right calculations the results are far from what should be ### 4/5 — Perfect but *2020-08-27* Works flawlessly for me but a new update changed the colour scheme. Red text on black background is way harder to read ### 1/5 — Crashes in iOS10 *2020-08-26, version 5* I've used this app for years with no problem, it was brilliant but since the latest update it’s absolute rubbish! .576 to .678 works out at 21.54kwn? I don’t think so! It should be more like 30.4kwn. I hate the new one button set up! Previous version was much better! Sort it out GB!!!🙏🙏🙏 ### 1/5 — Crashes a lot *2020-08-25* Used to be good, but since change of layout, stopped using. ### 1/5 — No longer works *2020-08-24* Update has made the app no longer work! Can’t hit a calculate button ### 1/5 — Ruined *2020-07-29* Was one of the best apps I used for gas rating until the latest update Now it’s ruined. Please go back to the old version. ### 1/5 — Not good since update *2020-07-28* Since update it is rubbish. Now deleted ### 1/5 — They have changed it!!! *2020-07-23* WHY!!!!! It’s rubbish now! ### 1/5 — Rubbish *2020-07-23* New format is rubbish, looses data when reopened aswell👎👎old format was great!! ## Frequently asked questions about GB Gas Heat Input Calculator ### What does the Gas Heat Input Calculator app do? This app is designed to simplify the process of calculating natural gas heat input and gas rates for installations. It allows users to accurately time their gas meter and input readings to quickly obtain the required calculations. ### How do I use the app for metric meters? For metric meters, you will need to time the meter for a specific duration, ideally two minutes for greater accuracy. Then, input the first and second readings into the designated fields and press calculate to get your answer. ### Can I use this app for imperial meters? Yes, the app supports imperial meters. For imperial meters, you should time one revolution of the meter. Then, press calculate without entering readings into the metric boxes, and your answer will be displayed. ### Is this app free to use? Yes, the application is completely free to use. There are no costs associated with downloading or using its features for calculating gas heat input and rates. ### What are the benefits of using this app over manual calculations? The primary benefit is its simplicity and speed. It eliminates the need to consult charts or perform long-winded manual calculations, providing instant and accurate results for natural gas installations. ## Version history (last 5 releases) ### 6 — 2020-10-04 Minor Fix to App, added marketing URL ### 5 — 2020-07-23 Glitch Fixes. ### 4 — 2020-07-21 Updated to the same as the paid version with adverts. No longer require to time for exactly two minutes, the calculation works with the time used although a longer time is more accurate. ### 3 — 2016-09-28 minor glitch fixes for IOS 10 ### 2.2 — 2012-07-14 Flip page to look at allowable values Instructions for use for those whoa re still not sure or don't use it often. ## Apps similar to GB Gas Heat Input Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [BOOKABUILDER](https://appshunter.io/ios/app/bookabuilder/id1092089910) | 5.0 (20) | Free | Business | | [Gas App Uk](https://appshunter.io/ios/app/gas-app-uk/id1033168436) | 3.0 (2) | Free | Business | | [Commusoft - Job Management](https://appshunter.io/ios/app/commusoft-job-management/id962643804) | 4.5 (6) | Free | Business | | [Tradify - Quote & Invoice Tool](https://appshunter.io/ios/app/tradify-quote-and-invoice-tool/id984378901) | 4.8 (175) | Free | Business | | [Trade Mastermind Club](https://appshunter.io/ios/app/trade-mastermind-club/id1631152954) | — | Free | Business | ## More apps by GB-GAS.CO.UK - [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 Pipe Sizing Calculator](https://appshunter.io/ios/app/gb-gas-pipe-sizing-calculator/id427457719) - [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 heat input calculator](https://appshunter.io/ios/topics/gb-gas-heat-input-calculator) · [gb gas rate calculator](https://appshunter.io/ios/topics/gb-gas-rate-calculator) · [gas ventilation calculator uk](https://appshunter.io/ios/topics/gas-ventilation-calculator-uk) · [gas rate calculator](https://appshunter.io/ios/topics/gas-rate-calculator) · [gb gas pipe sizing calculator](https://appshunter.io/ios/topics/gb-gas-pipe-sizing-calculator) · [budget calculator gas](https://appshunter.io/ios/topics/budget-calculator-gas) --- *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 2026-09-05.*