Radiator Size Calculator
UK BTU Radiator Calculator
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Plan your heating properly. Get a quick radiator size or set up your room step by step for a more accurate result.
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
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, William Newcombe, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- William Newcombe
- Size
- 8.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Full Access $2.99
- Copyright
- © 2026 Will Newcombe
