Roof Pitch Calculator
Rise and run
Rise and run can be measured over any distance — the outputs are ratios, so 6 in over 12 in gives the same pitch as 6 ft over 12 ft. Both fields just need the same unit.
Results
A rise of 6 in over a run of 12 in is a 6/12 pitch — a 26.6° roof angle with an area multiplier of 1.118.
Roof pitch
6/12
That's a conventional walkable-to-moderate pitch — the range most house roofs fall in.
Standard shingle installation applies. Above roughly 6/12, walking the roof gets uncomfortable and above 8/12 most roofers charge steep-slope labor premiums and use staging — worth factoring into any quote you request.
Roof angle: 26.6°
Pitch multiplier (footprint area × this = true roof area): 1.118