BoardCalc

BoardCalc helps builders, carpenters, remodelers, and DIYers solve everyday jobsite math without juggling paper notes, span charts, or a generic calculator. Enter measurements the way you use them in the field, including feet, inches, and fractions, then get clear results for stairs, roofs, board feet, rafters, materials, arcs, and unit conversions.

Then the feature list should be framed around outcomes:

Plan stairs with riser, tread, run, stringer, and angle results.
Estimate roof pitch, roof area, diagonal lengths, hip/valley rafters, and jack rafters.
Calculate board feet, area, and material weight from jobsite dimensions.
Convert between metric and imperial units without leaving the calculator.
Copy results so you can save, share, or double-check them later.