Simple Units

Radiator BTU Calculator

Don’t guess your heating needs. Calculate the required BTU output based on your room dimensions, window types, and wall exposure.

Required Output

8640 BTU

Watts

2534 W

* Estimator only. Consult a heating engineer for precise sizing.

Pro Tools & Essentials

Pipe cutter
Adjustable spanner
PTFE tape
Radiator key
Bucket & towels

Project Supplies

Looking for materials? In the future, we'll provide curated links to top DIY stores to help you get started on your project.