Free Tool
Roof Pitch & Rafter Calculator
Convert pitch angle to rise, rafter length and roof area, with instant tile, slate and batten quantities.
5°60°
Common UK pitches
Rise
2.80m
Rafter
5.18m
Roof area
103.7m²
Ratio
1 : 1.4
Materials guide (incl. waste)
Interlocking concrete tiles (~10/m²)1089
Plain clay tiles (~60/m²)6531
Natural slates (~13/m²)1415
Batten length332 m
Breathable membrane120 m²
Guide quantities only. Confirm coverage with your tile manufacturer. Need full roof drawings? Request a free quote.