# Radiator Size Calculator — UK BTU Radiator Calculator

> UK BTU Radiator Calculator (iPhone/iPad app by William Newcombe.)

- Source: https://appshunter.io/ios/app/radiator-size-calculator/id6761782462 (this page in markdown: same URL + `.md`)
- Developer: [William Newcombe](https://appshunter.io/developer/1215031696)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 8 MB
- Languages: American English
- Released: 2026-04-15
- Data updated: 2026-07-10
- User reviews in markdown: https://appshunter.io/ios/app/radiator-size-calculator/id6761782462/reviews.md

## What is Radiator Size Calculator?

Radiator Size Calculator helps you figure out what size radiator you actually need, without overcomplicating it.

You can either get a quick estimate in seconds, or take a bit more time and set up your room properly for a more accurate result.

It’s built around typical UK homes, so the numbers you get are practical and useful.

== What you get ==

Free to use
• Quick Calculate for fast radiator sizing
• Instant BTU and wattage estimates

Full Access (one-time purchase)
• Guided room setup with step-by-step help
• Save multiple rooms
• Export your data as text or CSV
• More detailed, tailored results

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Access | $2.99 | one-time |



## Version history (last 1 release)

### 1.1 — 2026-04-15

No release notes.

## More apps by William Newcombe

- [Tuner for 12 String Guitar](https://appshunter.io/ios/app/tuner-for-12-string-guitar/id1215041739)
- [Life Calculator for YuGiOh](https://appshunter.io/ios/app/life-calculator-for-yugioh/id1526497385)
- [12 String Guitar Tuner](https://appshunter.io/ios/app/12-string-guitar-tuner/id1576080921)
- [PT100 Calculator](https://appshunter.io/ios/app/pt100-calculator/id1577277449)
- [Torque Calculator](https://appshunter.io/ios/app/torque-calculator/id6767835252)

All apps by William Newcombe: https://appshunter.io/developer/1215031696

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*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 2026-07-10.*