UK Roof Pitch Calculator
Convert roof pitch between degrees, ratio, and rise & run. Calculate rafter length and common UK roof angles.
Pitch Converter
Rise & Run
Common UK Pitches
Roof Pitch Conversion
Roof Pitch in the UK
Common roof pitches range from 15° (shallow) to 45° (steep). Minimum recommended pitch for tiles is usually 15–22.5° depending on tile type. This calculator helps builders, roofers, and homeowners plan accurately.
Frequently Asked Questions
25° to 35° is most common for residential homes. Shallower than 15° usually requires special membranes.
Measure vertical rise and horizontal run. Pitch = Rise ÷ Run (e.g., 4:12 or 18.4°).
Yes. Low pitches need special tiles or membrane roofing. Steeper pitches allow traditional tiles and slates.